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Cisco 300-115

Implementing Cisco IP Switched Networks
Version: 10.0

Cisco 300-115 Exam
Topic 1, Layer 2 Technologies

QUESTION NO: 1
What is the maximum number of switches that can be stacked using Cisco StackWise?
A. 4
B. 5
C. 8
D. 9
E. 10
F. 13
Answer: D
Explanation:
Up to 9 Cisco Catalyst switches can be stacked together to build single logical StackWise switch
since Cisco IOS XE Release 3.3.0SE. Prior to Cisco IOS XE Release3.3.0SE, up to 4 Cisco
Catalyst switches could be stacked together.
Reference: http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-3850-seriesswitches/qa_c67-722110.html

QUESTION NO: 2
A network engineer wants to add a new switch to an existing switch stack. Which configuration
must be added to the new switch before it can be added to the switch stack?
A. No configuration must be added.
B. stack ID
C. IP address
D. VLAN information
E. VTP information
Answer: A
Explanation:
Switch Stack Offline Configuration
You can use the offline configuration feature to provision (to supply a configuration to) a new
switch before it joins the switch stack. You can configure in advance the stack member number,

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Cisco 300-115 Exam
the switch type, and the interfaces associated with a switch that is not currently part of the stack.
The configuration that you create on the switch stack is called the provisioned configuration . The
switch that is added to the switch stack and that receives this configuration is called the
provisioned switch.
You manually create the provisioned configuration through the switch stack-member-number
provision type global configuration command. The provisioned configuration is automatically
created when a switch is added to a switch stack and when no provisioned configuration exists.
When you configure the interfaces associated with a provisioned switch (for example, as part of a
VLAN), the switch stack accepts the configuration, and the information appears in the running
configuration. The interface associated with the provisioned switch is not active, operates as if it is
administratively shut down, and the no shutdown interface configuration command does not
return it to active service. The interface associated with the provisioned switch does not appear in
the display of the specific feature; for example, it does not appear in the show vlan user EXEC
command output.
The switch stack retains the provisioned configuration in the running configuration whether or not
the provisioned switch is part of the stack. You can save the provisioned configuration to the
startup configuration file by entering the copy running-config startup-config privileged EXEC
command. The startup configuration file ensures that the switch stack can reload and can use the
saved information whether or not the provisioned switch is part of the switch stack.
Effects of Adding a Provisioned Switch to a Switch Stack
When you add a provisioned switch to the switch stack, the stack applies either the provisioned
configuration or the default configuration. Table 5-1 lists the events that occur when the switch
stack compares the provisioned configuration with the provisioned switch.
Table 5-1 Results of Comparing the Provisioned Configuration with the Provisioned Switch
Scenario
Result
The stack member numbers and the switch types match.
1.
If the stack member number of the provisioned switch matches the stack member number in the
provisioned configuration on the stack, and
2.
If the switch type of the provisioned switch matches the switch type in the provisioned
configuration on the stack.
The switch stack applies the provisioned configuration to the provisioned switch and adds it to the
stack.
The stack member numbers match but the switch types do not match.
1.
If the stack member number of the provisioned switch matches the stack member number in the
provisioned configuration on the stack, but
2.
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3
The switch type of the provisioned switch does not match the switch type in the provisioned

html "Pass Any Exam. The stack member number of the provisioned switch is in conflict with an existing stack member. but the switch types do not match: 1.Cisco 300-115 Exam The switch stack applies the default configuration to the provisioned switch and adds it to the stack. The switch stack applies the default configuration to the provisioned switch and adds it to the stack.www. The stack member number of the provisioned switch is not found in the provisioned configuration. but 2.actualtests. and 2. The switch stack applies the default configuration to the provisioned switch and adds it to the stack. The stack master assigns a new stack member number to the provisioned switch. The provisioned configuration is changed to reflect the new information. The switch stack applies the default configuration to the provisioned switch and adds it to the stack.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/122_55_se/configuration/guide/3750xscg/swstack. If the new stack member number of the provisioned switch matches the stack member number in the provisioned configuration on the stack. The provisioned configuration is changed to reflect the new information. Reference: http://www. Any Time. The switch type of the provisioned switch does not match the switch type in the provisioned configuration on the stack. The stack member number is not found in the provisioned configuration.cisco." . If the switch type of the provisioned switch matches the switch type in the provisioned configuration on the stack.com 4 . If the stack member number of the provisioned switch matches the stack member number in the provisioned configuration on the stack. The provisioned configuration is changed to reflect the new information. The provisioned configuration is changed to reflect the new information. The stack member numbers and the switch types match: 1. The stack member numbers match. The switch stack applies the provisioned configuration to the provisioned switch and adds it to the stack.

Cisco StackWise Technology Resilient Cabling Reference: http://www. This mechanism restores dual path flow when the timing mechanisms detect renewed activity on the cable.com 5 . 50 D.actualtests.com/c/en/us/products/collateral/switches/catalyst-3750-seriesswitches/prod_white_paper09186a00801b096a. 100 Answer: C Explanation: Physical Sequential Linkage The switches are physically connected sequentially. Subsecond timing mechanisms detect traffic problems and immediately institute failover.Cisco 300-115 Exam QUESTION NO: 3 What percentage of bandwidth is reduced when a stack cable is broken? A. 0 B. "Pass Any Exam. Figure 3. Any Time.cisco. A break in any one of the cables will result in the stack bandwidth being reduced to half of its full capacity.www." .html QUESTION NO: 4 Refer to the exhibit. 75 E. 25 C. as shown in Figure 3.

Any Time. switch1 channel-group 1 mode on switch2 channel-group 1 mode auto D. switch1 channel-group 1 mode desirable switch2 channel-group 1 mode passive C. switch1 channel-group 1 mode desirable switch2 channel-group 1 mode auto Answer: D Explanation: "Pass Any Exam.www." .Cisco 300-115 Exam Which set of configurations will result in all ports on both switches successfully bundling into an EtherChannel? A. switch1 channel-group 1 mode active switch2 channel-group 1 mode auto B.com 6 .actualtests.

Reference: http://www. for Layer 2 EtherChannels. Any Time. An interface in the on mode that is added to a port channel is forced to have the same characteristics as the already existing on mode interfaces in the channel.Cisco 300-115 Exam The different etherchannel modes are described in the table below: Mode Description active Places an interface into an active negotiating state. in which the interface responds to PAgP packets it receives but does not start PAgP packet negotiation. but does not start LACP packet negotiation.actualtests. With the on mode.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/121_13_ea1/configuration/guide/3550scg/swethchl. desirable Places an interface into an active negotiating state. on Forces the interface into an EtherChannel without PAgP or LACP." . •An interface in the auto mode can form an EtherChannel with another interface in the desirable mode. in which the interface starts negotiations with other interfaces by sending LACP packets. trunking state and VLAN numbers. passive Places an interface into a passive negotiating state. a usable EtherChannel exists only when an interface group in the on mode is connected to another interface group in the on mode. This setting minimizes the transmission of PAgP packets. Interfaces can form an EtherChannel when they are in different PAgP modes as long as the modes are compatible. in which the interface responds to LACP packets that it receives.html "Pass Any Exam. An interface in the auto mode cannot form an EtherChannel with another interface that is also in the auto mode because neither interface starts PAgP negotiation. Both the auto and desirable PAgP modes allow interfaces to negotiate with partner interfaces to determine if they can form an EtherChannel based on criteria such as interface speed and.www.com 7 . auto Places an interface into a passive negotiating state. in which the interface starts negotiations with other interfaces by sending PAgP packets. For example: •An interface in the desirable mode can form an EtherChannel with another interface that is in the desirable or auto mode. This setting minimizes the transmission of LACP packets.cisco.

B. By default. You can monitor traffic on a single VLAN or on a series or range of ports or VLANs. or to limit (filter) SPAN source traffic to specific VLANs. | -] options." . You select a series or range of VLANs by using the [ . you must enter a space before and after the hyphen ( -). Any Time. Change the monitor session source to VLAN 10 instead of the physical interface. Add an access list to GigabitEthernet0/48 to filter out traffic that is not in VLAN 10. How can the traffic that is mirrored out the GigabitEthernet0/48 port be limited to only traffic that is received or transmitted in VLAN 10 on the GigabitEthernet0/1 port? A.www. You can have a total of 66 SPAN and RSPAN sessions on a switch or switch stack. You can use the monitor session session_number filter vlan vlan-id command to limit SPAN traffic on trunk source ports to only the specified VLANs. Usage Guidelines You can set a combined maximum of two local SPAN sessions and RSPAN source sessions. If you specify a series of VLANs. C. Change the configuration for GigabitEthernet0/48 so that it is a member of VLAN 10. If you specify a range of VLANs. D. VLAN filtering refers to analyzing network traffic on a selected set of VLANs on trunk source ports. If a VLAN is a source. Answer: C Explanation: To start a new flow-based SPAN (FSPAN) session or flow-based RSPAN (FRSPAN) source or destination session.actualtests. Apply the monitor session filter globally to allow only traffic from VLAN 10. use the monitor session filter global configuration command. you must enter a space before and after the comma. all VLANs are monitored on trunk source ports. VLAN monitoring and VLAN filtering are mutually exclusive.com 8 .Cisco 300-115 Exam QUESTION NO: 5 Refer to the exhibit. VLAN filtering "Pass Any Exam.

C. A monitor session on the access switch with a remote SPAN VLAN source and the physical interface as the destination F." .cisco. A remote SPAN VLAN on the distribution and access layer switch C.html#wp38 75419997 QUESTION NO: 6 Refer to the exhibit. A monitor session on the distribution switch with a physical interface as the source and the remote SPAN VLAN as the destination B. a VLAN cannot become a source.Cisco 300-115 Exam cannot be enabled.com 9 .www. A monitor session on the access switch with a physical interface source and the remote SPAN VLAN as the destination D. Which three items must be configured to mirror traffic to a packet sniffer that is connected to the distribution switch? (Choose three.D Explanation: "Pass Any Exam.) A.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/network_ma nagement/command_reference/b_nm_3se_3850_cr/b_nm_3se_3850_cr_chapter_010. A network engineer wants to analyze all incoming and outgoing packets for an interface that is connected to an access switch. A monitor session on the distribution switch with a remote SPAN VLAN as the source and physical interface as the destination E. A monitor session on the distribution switch with a physical interface as the source and a physical interface as the destination Answer: B. If VLAN filtering is configured. Any Time. Reference: http://www.actualtests.

while Switch B is configured with channel-group 1 mode desirable. The destination is always a physical port. You can not mix the LACP and PAGP protocols to form an etherchannel.com 10 . Why is the EtherChannel bundle not working? A.cisco. which is a PAGP mode. source VLANs. Answer: A Explanation: Here we have a situation where one switch is using active mode.actualtests. enabling remote monitoring of multiple switches across your network. and destination ports on different switches (or different switch stacks). Any Time.Cisco 300-115 Exam You can analyze network traffic passing through ports or VLANs by using SPAN or RSPAN to send a copy of the traffic to another port on the switch or on another switch that has been connected to a network analyzer or other monitoring or security device. The switches are using mismatched EtherChannel negotiation modes. and the other is using desirable." . The traffic for each RSPAN session is carried over a user-specified RSPAN VLAN that is dedicated for that RSPAN session in all participating switches. This setting minimizes the transmission of "Pass Any Exam. in which the port responds to PagP packets it receives but does not start PagP packet negotiation. Switch A is configured with channel-group 1 mode active.www. LACP priority must be configured on both switches. Here is a summary of the various etherchannel modes: EtherChannel PagP Modes Mode Description auto Places a port into a passive negotiating state. B. D. The RSPAN traffic from the source ports or VLANs is copied into the RSPAN VLAN and forwarded over trunk ports carrying the RSPAN VLAN to a destination session monitoring the RSPAN VLAN. Each RSPAN source switch must have either ports or VLANs as RSPAN sources. C. RSPAN supports source ports. Reference: http://www.html QUESTION NO: 7 After an EtherChannel is configured between two Cisco switches. The channel group identifier must be different for Switch A and Switch B. which is an LACP mode. interface port channel 1 is in the down/down state. SPAN copies (or mirrors) traffic received or sent (or both) on source ports or source VLANs to a destination port for analysis. The switch ports are not configured in trunking mode.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/122_55_se/configuration/guide/3750xscg/swspan.

The network administrator noticed that only one of the EtherChannel links is being utilized to reach the web server.actualtests. D.cisco. Passive Places a port into a passive negotiating state in which the port responds to LACP packets that it receives. in which the port starts negotiations with other ports by sending PagP packets.Cisco 300-115 Exam PagP packets. but does not start LACP packet negotiation. Disable spanning tree on all interfaces that are participating in the EtherChannel bundle. Answer: E Explanation: "Pass Any Exam. EtherChannel LACP Modes Mode Description active Places a port into an active negotiating state in which the port starts negotiations with other ports by sending LACP packets. This mode is not supported when the EtherChannel members are from different switches in the switch stack (cross-stack EtherChannel). E.html QUESTION NO: 8 An EtherChannel bundle has been established between a Cisco switch and a corporate web server. Use link-state tracking to allow for improved load balancing of traffic upon link failure to the server. Enable Cisco Express Forwarding to allow for more effective traffic sharing over the EtherChannel bundle. This mode is not supported when the EtherChannel members are from different switches in the switch stack (cross-stack EtherChannel). Desirable Places a port into an active negotiating state. Reference: http://www.www. What should be done on the Cisco switch to allow for better EtherChannel utilization to the corporate web server? A. B.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/122_55_se/configuration/guide/scg_2960/swethchl." . C. Adjust the EtherChannel load-balancing method based on destination IP addresses. This setting minimizes the transmission of LACP packets. Any Time.com 11 . Adjust the EtherChannel load-balancing method based on source IP addresses.

use of the destination MAC address results in the choice of the same link in the channel each time." .Cisco 300-115 Exam EtherChannel load balancing can use MAC addresses. For example. C. since all traffic is going to the same web server). Filtering a trunked SPAN port effectively disables SPAN operations for all VLANs. or both. if the traffic on a channel only goes to a single MAC address (which is the case in this example. All VLAN traffic is sent to the SPAN destination interface. and either source mode. Use the option that provides the greatest variety in your configuration.html/index. E. and 52 is replicated to the SPAN destination port. Traffic from VLANs 1 to 8. The mode you select applies to all EtherChannels that you configure on the switch.actualtests.html#wp1066836 "Pass Any Exam. Answer: E Explanation: The “monitor session filter” command is used to specify which VLANS are to be port mirrored using SPAN. The trunk’s native VLAN must be changed to something other than VLAN 1. 52 What is the result of the implemented command? A. destination mode. Use of source addresses or IP addresses can result in a better load balance. Traffic from VLAN 4 is not sent to the SPAN destination interface.www. D. or Layer 4 port numbers. 39. This command is configured globally: monitor session 2 filter vlan 1 – 8.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4.cisco. 9 Reference: http://www.com 12 . This example shows how to monitor VLANs 1 through 5 and VLAN 9 when the SPAN source is a trunk interface: Switch(config)# monitor session 2 filter vlan 1 – 5 . IP addresses.html QUESTION NO: 9 Interface FastEthernet0/1 is configured as a trunk interface that allows all VLANs. Any Time. B. 39.com/c/en/us/td/docs/switches/lan/catalyst4500/122/25ew/configuration/guide/conf/span. Reference: http://www.cisco.

IP routing is disabled on neighboring devices. C. Directed Response Protocol Answer: B Explanation: The Link Layer Discovery Protocol (LLDP) is a vendor-neutral link layer protocol in the Internet Protocol Suite used by network devices for advertising their identity. then each router will only have the single switch port that it connects to as its neighbor. Cisco Discovery Protocol advertisements are inconsistent between the local and remote devices. capabilities.com 13 . What would cause the output to show only the single neighbor? A. a network engineer notices that directly connected devices that use Cisco Discovery Protocol are not visible. Even though multiple routing neighbors can be formed over a layer 2 network. CDP can be used to determine the physical topology. "Pass Any Exam.actualtests. principally wired Ethernet. Answer: A Explanation: If all of the routers are connected to each other using a layer 2 switch. only the physical port that it connects to will be seen as a CDP neighbor. and neighbors on an IEEE 802 local area network. B. Cisco Express Forwarding is enabled locally.www. Any Time. but not necessarily the logical topology. Local Area Mobility B. NetFlow D. The engineer notices only a single neighbor that uses Cisco Discovery Protocol. such as the Cisco Discovery Protocol (CDP). LLDP performs functions similar to several proprietary protocols. Link Layer Discovery Protocol C. The routers are connected via a Layer 2 switch. but it has several routing neighbor relationships." . Which vendor-neutral protocol could be used to resolve this issue? A. QUESTION NO: 11 After the implementation of several different types of switches from different vendors. D.Cisco 300-115 Exam QUESTION NO: 10 A network engineer notices inconsistent Cisco Discovery Protocol neighbors according to the diagram that is provided.

All VLAN changes must be done on this switch in order to have them propagated to the VTP clients. Make sure that all ports that interconnect switches are configured as trunks and are actually trunking. •One of the switches must be the VTP server in a VTP domain. Answer: D Explanation: VTP allows switches to advertise VLAN information between other members of the same VTP domain. What must be done to fix this? A. password. Make sure that if EtherChannels are created between two switches.actualtests.shtml "Pass Any Exam. and version. Verify these items if switches that run VTP fail to exchange VLAN information: •VTP information only passes through a trunk port. CISCO and cisco are two different domain names. However. VLANs are not passing from the VTP server (existing network) to the VTP clients.wikipedia.www. D. All of the new switches have been configured with the same VTP domain. Any Time. Reference: http://www. C. •The VTP domain name must match and it is case sensitive. VTP allows a consistent view of the switched network across all switches.Cisco 300-115 Exam Reference: http://en. Ensure that all switch interconnects are configured as trunks to allow VTP information to be transferred. •Make sure that the VLANs are active in all the devices. B.com 14 . Configure a different native VLAN on all new switches that are configured as VTP clients.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613. There are several reasons why the VLAN information can fail to be exchanged. If any password is set. •Make sure that no password is set between the server and client.cisco. Remove the VTP domain name from all switches with "null" and then replace it with the new domain name. make sure that the password is the same on both sides. Provision one of the new switches to be the VTP server and duplicate information from the existing network. only Layer 2 EtherChannels propagate VLAN information." .org/wiki/Link_Layer_Discovery_Protocol QUESTION NO: 12 Several new switches have been added to the existing network as VTP clients.

Cisco 300-115 Exam

QUESTION NO: 13
After implementing VTP, the extended VLANs are not being propagated to other VTP switches.
What should be configured for extended VLANs?
A. VTP does not support extended VLANs and should be manually added to all switches.
B. Enable VTP version 3, which supports extended VLAN propagation.
C. VTP authentication is required when using extended VLANs because of their ability to cause
network instability.
D. Ensure that all switches run the same Cisco IOS version. Extended VLANs will not propagate to
different IOS versions when extended VLANs are in use.
Answer: B
Explanation:
• VTP version 1 and VTP version 2 do not propagate configuration information for extended-range
VLANs (VLAN numbers 1006 to 4094). You must configure extended-range VLANs manually on
each network device.
• VTP version 3 supports extended-range VLANs (VLAN numbers 1006 to 4094). If you convert
from VTP version 3 to VTP version 2, the VLANs in the range 1006 to 4094 are removed from
VTP control.
Reference:
http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/15.1SY/config_guide/sup2T/vtp.pd
f

QUESTION NO: 14
Refer to the exhibit.

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Cisco 300-115 Exam
Switch A, B, and C are trunked together and have been properly configured for VTP. Switch C
receives VLAN information from the VTP server Switch A, but Switch B does not receive any
VLAN information. What is the most probable cause of this behavior?
A. Switch B is configured in transparent mode.
B. Switch B is configured with an access port to Switch A, while Switch C is configured with a
trunk port to Switch B.
C. The VTP revision number of the Switch B is higher than that of Switch A.
D. The trunk between Switch A and Switch B is misconfigured.
Answer: A
Explanation:
VTP transparent switches do not participate in VTP. A VTP transparent switch does not advertise
its VLAN configuration and does not synchronize its VLAN configuration based on received
advertisements, but transparent switches do forward VTP advertisements that they receive out
their trunk ports in VTP Version 2.
Reference:
http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094c52.shtml

QUESTION NO: 15
Refer to the exhibit.

Switch A, B, and C are trunked together and have been properly configured for VTP. Switch B has
all VLANs, but Switch C is not receiving traffic from certain VLANs. What would cause this issue?
A. A VTP authentication mismatch occurred between Switch A and Switch B.
B. The VTP revision number of Switch B is higher than that of Switch A.
C. VTP pruning is configured globally on all switches and it removed VLANs from the trunk
interface that is connected to Switch C.

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Cisco 300-115 Exam
D. The trunk between Switch A and Switch B is misconfigured.
Answer: C
Explanation:
VTP pruning increases network available bandwidth by restricting flooded traffic to those trunk
links that the traffic must use to reach the destination devices. Without VTP pruning, a switch
floods broadcast, multicast, and unknown unicast traffic across all trunk links within a VTP domain
even though receiving switches might discard them. VTP pruning is disabled by default.
VTP pruning blocks unneeded flooded traffic to VLANs on trunk ports that are included in the
pruning-eligible list. The best explanation for why switch C is not seeing traffic from only some of
the VLANs, is that VTP pruning has been configured.

QUESTION NO: 16
After the recent upgrade of the switching infrastructure, the network engineer notices that the port
roles that were once “blocking” are now defined as “alternate” and “backup.” What is the reason
for this change?
A. The new switches are using RSTP instead of legacy IEEE 802.1D STP.
B. IEEE 802.1D STP and PortFast have been configured by default on all newly implemented
Cisco Catalyst switches.
C. The administrator has defined the switch as the root in the STP domain.
D. The port roles have been adjusted based on the interface bandwidth and timers of the new
Cisco Catalyst switches.
Answer: A
Explanation:
RSTP works by adding an alternative port and a backup port compared to STP. These ports are
allowed to immediately enter the forwarding state rather than passively wait for the network to
converge.
RSTP bridge port roles:
* Root port – A forwarding port that is the closest to the root bridge in terms of path cost
* Designated port – A forwarding port for every LAN segment
* Alternate port – A best alternate path to the root bridge. This path is different than using the root
port. The alternative port moves to the forwarding state if there is a failure on the designated port
for the segment.
* Backup port – A backup/redundant path to a segment where another bridge port already
connects. The backup port applies only when a single switch has two links to the same segment
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* Disabled port – Not strictly part of STP.cisco.com/c/en/us/support/docs/lan-switching/spanning-treeprotocol/24062-146. C. The switch does not have the processing power to ensure rapid transition for all ports.com/c/en/us/support/docs/lan-switching/spanning-treeprotocol/24062-146.html QUESTION NO: 17 An administrator recently configured all ports for rapid transition using PortFast. most links operate in full-duplex mode and are treated as point-to-point links by RSTP. To have two links to the same collision domain. Any Time. Answer: C Explanation: RSTP can only achieve rapid transition to the forwarding state on edge ports and on point-to-point links. In switched networks today. STP is unable to achieve rapid transition for trunk links. while a half-duplex port is considered as a shared port by default. D. a network administrator can manually disable a port Reference: http://www. What is the reason for this? A.cisco. access lists "Pass Any Exam.actualtests. This makes them candidates for rapid transition to the forwarding state. Reference: http://www. A port that operates in full-duplex is assumed to be point-to-point. After testing.html QUESTION NO: 18 Which technique automatically limits VLAN traffic to only the switches that require it? A. The STP root bridge selection is forcing key ports to remain in non-rapid transitioning mode. it has been determined that several ports are not transitioning as they should. B.www. This automatic link type setting can be overridden by explicit configuration. not on trunk links. the switch must be attached to a hub." .Cisco 300-115 Exam (collision domain). The link type is automatically derived from the duplex mode of a port.com 18 . RSTP has been enabled per interface and not globally.

cisco. The default timeout period will be 360 seconds. unknown. DTP in nonegotiate C. E. multicast. such as broadcast. Reference: http://www.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/vtp. "Pass Any Exam. D. and flooded unicast packets to only the switches that require it. The MAC address-table will hold addresses 180 seconds longer than the default of 10 minutes.actualtests. B. The MAC address-table will be flushed every 3 minutes.www.com 19 . This is how long a dynamic MAC address will remain in the CAM table. perform this task: Command Purpose Step 1 switch# configure terminal Enters configuration mode. VTP pruning increases available bandwidth by restricting flooded traffic to those trunk links that the traffic must use to access the appropriate network devices.Cisco 300-115 Exam B. Answer: A Explanation: You can configure the amount of time that an entry (the packet source MAC address and port that packet ingresses) remain in the MAC table. By default." . ARP requests will be processed less frequently by the switch. Any Time. VTP pruning D. VTP pruning is disabled.html#wp1020444 QUESTION NO: 19 What effect does the mac address-table aging-time 180 command have on the MAC addresstable? A. PBR Answer: C Explanation: VTP pruning enhances network bandwidth use by reducing unnecessary flooded traffic. C. To configure the aging time for all MAC addresses.

assess.actualtests. manual intervention by an administrator is necessary to restore the interface to working order. the link was placed into a non-forwarding state due to a fault with UDLD.cisco. or a broadcast storm. a technician accidently bumps the fiber connection between two core switches and damages one of the pairs of fiber. command aliases E. the aging specification applies to all VLANs.com 20 . and (ideally) correct the issue. As designed.Cisco 300-115 Exam Step 2 switch(config)# mac-address-table aging-time seconds [vlan vlan_id] Specifies the time before an entry ages out and is discarded from the MAC address table. The idea behind requiring administrative action is so that a human engineer can intercede. After the damaged cable was replaced. We can configure the switch to "Pass Any Exam. By default. Bidirectional Forwarding Detection Answer: B Explanation: There are a number of events which can disable a link on a Catalyst switch.www. Entering the value 0 disables the MAC aging. the link did not recover. However. IP Event Dampening D. The range is from 0 to 1000000. This is where errdisable autorecovery can be of great assistance." . This example shows how to set the aging time for entries in the MAC address table to 600 seconds (10 minutes): switch# configure terminal switch(config)# mac-address-table aging-time 600 Reference: http://www. What solution allows the network switch to automatically recover from such an issue? A. some configurations may be prone to accidental violations.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/C LIConfigurationGuide/MACAddress. and a steady recurrence of these can amount to a huge time sink for the administrative staff. UDLD failure. such as the detection of a loopback. If a VLAN is not specified.html#wp1126206 QUESTION NO: 20 While working in the core network building. macros B. this can be done by issuing shutdown followed by no shutdown on the interface. the default is 300 seconds. errdisable autorecovery C. Any Time.

VLAN filters are required to ensure traffic mirrors effectively. This gives the offending issue a chance to be cleared by the user (for example. by removing an unapproved device) without the need for administrative intervention.com/c/en/us/support/docs/switches/catalyst-3750-seriesswitches/44921-swdatabase-3750ss-44921.cisco.com 21 .www. RSPAN must be used to capture EtherChannel bidirectional traffic. The port channel can be used as a SPAN source. The SDM template is causing the CPU of the switch to spike during peak working hours. B. After configuring SPAN to monitor this port. The VLAN receives additional frames from neighboring switches. C.actualtests." .net/blog/2009/sep/14/errdisable-autorecovery/ QUESTION NO: 21 A network engineer deployed a switch that operates the LAN base feature set and decides to use the SDM VLAN template. "Pass Any Exam. The VLAN template disables routing in hardware. Reference: http://packetlife. Answer: C Explanation: SDM Template Notes: Choosing the VLAN template will actually disable routing (number of entry for unicast or multicast route is zero) in hardware. The SDM VLAN template causes the MAC address-table to overflow. D. What is a cause for this issue? A. What is the root cause of this issue? A. D.html QUESTION NO: 22 An access switch has been configured with an EtherChannel port. Any Time. the network administrator notices that not all traffic is being replicated to the management server. The switch needs to be rebooted before the SDM template takes effect.Cisco 300-115 Exam automatically re-enable any error-disabled interfaces after a specified timeout period. Reference: http://www. C. B. but not a destination. SPAN encapsulation replication must be enabled to capture EtherChannel destination traffic.

B. The EtherChannels would form.Cisco 300-115 Exam Answer: C Explanation: A source port or EtherChannel is a port or EtherChannel monitored for traffic analysis. You can configure ports or EtherChannels in any VLAN as SPAN sources. You can configure both Layer 2 and Layer 3 ports and EtherChannels as SPAN sources.cisco.com 22 .com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/span. but network loops would occur because the load-balancing "Pass Any Exam.www.html#wp1040905 QUESTION NO: 23 Refer to the exhibit. What is the result of the configuration? A. A port-channel interface (an EtherChannel) can be a SPAN source." . Trunk ports or EtherChannels can be configured as sources and mixed with nontrunk sources. C. The EtherChannels would not form because the load-balancing method must match on the devices. SPAN can monitor one or more source ports or EtherChannels in a single SPAN session. Any Time. The EtherChannels would form and function properly even though the load-balancing and EtherChannel modes do not match. but not a destination.actualtests. Reference: http://www.

com 23 . As a result.com/c/en/us/td/docs/switches/lan/catalyst4500/122/54sg/configuration/guide/config/channel.cisco.html#wp1020804 QUESTION NO: 24 "Pass Any Exam. Answer: B Explanation: An etherchannel will form if one end is active and the other is passive. Any Time. Reference: http://www. PagP.www.actualtests.Cisco 300-115 Exam methods do not match. The EtherChannels would form and both devices would use the dst-ip load-balancing method because Switch1 is configured with EtherChannel mode active. although each switch involved in the etherchannel can have non matching parameters for load balancing. all channels (manually configured. D. This is true for the switch globally. The table below sum-marizes the results for LACP channel establishment based on the configuration of each side of a link: LACP Channel Establishment S1 S2 Established? On On Yes Active/Passive Active Yes On/Active/Passive Not Configured No On Active No Passive/On Passive No Load balancing can only be configured globally. or LACP) use the same load-balancing." .

boosting nonstop communications. provide automatic failover to back up supervisor in VSS mode D.com/c/en/us/td/docs/switches/lan/catalyst4500/122/31sg/configuration/guide/conf/channel. The configuration will be rejected because storm control is not supported for EtherChannel. The settings will be applied to the EtherChannel bundle and all associated physical interfaces. Switches would operate as "Pass Any Exam. and scaling system bandwidth capacity to 1. The storm control configuration will be accepted. B. you cannot configure Storm Control on some of the members of an EtherChannel. What is the result of the configuration? A. but will only be present on the physical interfaces.4 Tbps. For example." .actualtests. C. forward traffic based on Cisco Express Forwarding C.com 24 .html QUESTION NO: 25 What is the function of NSF? A.cisco. Answer: D Explanation: After you configure an EtherChannel. any configuration that you apply to the physical interfaces affects only the interface where you apply the configuration. but not on the associated physical ports. If you configure Storm Control on only some of the ports. increasing operational efficiency. Storm Control must be configured on all or none of the ports. those ports will be dropped from the EtherChannel interface (put in suspended state). Storm Control is an exception to this rule. and not at the physical interface level. provide nonstop forwarding in the event of failure of one of the member supervisors Answer: D Explanation: VSS is network system virtualization technology that pools multiple Cisco Catalyst 6500 Series Switches into one virtual switch. you should configure Storm Control at the EtherChannel Interface level. Reference: http://www. The storm control settings will appear on the EtherChannel. any configuration that you apply to the port-channel interface affects the EtherChannel. Therefore. forward traffic simultaneously using both supervisors B. D. Any Time.www.Cisco 300-115 Exam A network engineer tries to configure storm control on an EtherChannel bundle.

B. Any Time. VSS formed by two Cisco Catalyst 6500 Series Switches with the Virtual Switching Supervisor 720-10GE. The port then transitions into the errdisable state. In a VSS. UDLD port is configured in aggressive mode. D. UDLD timers are inconsistent. Answer: B Explanation: With UDLD aggressive mode enabled. when a port on a bidirectional link that has a UDLD neighbor relationship established stops receiving UDLD packets. the port is disabled. UDLD is enabled globally. C.over-blog.com/article-cisco-catalyst-6500-series-vss-1440124536783.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/udld." .html QUESTION NO: 26 After UDLD is implemented. an engineer notices that the.actualtests.Cisco 300-115 Exam a single logical virtual switch called a virtual switching system 1440 (VSS1440).cisco.html QUESTION NO: 27 After reviewing UDLD status on switch ports. Which option describes what causes the port to go into the errdisable state? A. This port continues to reestablish until after eight failed retries.www. Both chassis are kept in sync with the inter-chassis Stateful Switchover (SSO) mechanism along with Nonstop Forwarding (NSF) to provide nonstop communication even in the event of failure of one of the member supervisor engines or chassis. Reference: http://www. Only one of the virtual switch members has the active control plane.com 25 . the data plane and switch fabric with capacity of 720 Gbps of supervisor engine in each chassis are active at the same time on both chassis. After eight failed retries. Reference: http://ciscorouterswitch. combining for an active 1400-Gbps switching capacity per VSS. a Network Administrator noticed that one port stops receiving UDLD packets. UDLD tries to reestablish the connection with the neighbor.” Which statement "Pass Any Exam. Normal UDLD operations that prevent traffic loops.

Cisco 300-115 Exam
describes what this indicates about the status of the port?
A. The port is fully operational and no known issues are detected.
B. The bidirectional status of “unknown” indicates that the port will go into the disabled state
because it stopped receiving UDLD packets from its neighbor.
C. UDLD moved into aggressive mode after inconsistent acknowledgements were detected.
D. The UDLD port is placed in the “unknown” state for 5 seconds until the next UDLD packet is
received on the interface.
Answer: A
Explanation:
By default, UDLD is disabled on all interfaces. We can enable UDLD globally on the device, or
individually on specific interfaces with the command udld port. This enables UDLD in normal
mode.
It would be prohibitively difficult to coordinate the configuration of UDLD on both ends of a link at
the same time, so when UDLD is first enabled and does not detect a neighbor the link state is
considered unknown, which is not necessarily an error condition. The port will remain operational
during this time. When UDLD is finally enabled on the other end, the status will transition to
bidirectional.
Reference: http://packetlife.net/blog/2011/mar/7/udld/

QUESTION NO: 28
Pilot testing of the new switching infrastructure finds that when the root port is lost, STP
immediately replaces the root port with an alternative root port. Which spanning-tree technology is
used to accomplish backup root port selection?
A. PVST+
B. PortFast
C. BackboneFast
D. UplinkFast
E. Loop Guard
F. UDLD
Answer: D
Explanation:
I f a switch loses connectivity, it begins using the alternate paths as soon as the spanning tree

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Cisco 300-115 Exam
selects a new root port. By enabling UplinkFast with the spanning-tree uplinkfast global
configuration command, you can accelerate the choice of a new root port when a link or switch
fails or when the spanning tree reconfigures itself. The root port transitions to the forwarding state
immediately without going through the listening and learning states, as it would with the normal
spanning-tree procedures.
UplinkFast provides fast convergence after a direct link failure and achieves load balancing
between redundant Layer 2 links using uplink groups. An uplink group is a set of Layer 2
interfaces (per VLAN), only one of which is forwarding at any given time. Specifically, an uplink
group consists of the root port (which is forwarding) and a set of blocked ports, except for selflooping ports. The uplink group provides an alternate path in case the currently forwarding link
fails.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/122_55_se/configuration/guide/scg_2960/swstpopt.html

QUESTION NO: 29
A network engineer must adjust the STP interface attributes to influence root port selection. Which
two elements are used to accomplish this? (Choose two.)
A. port-priority
B. cost
C. forward-timers
D. link type
E. root guard
Answer: A,B
Explanation:
Spanning tree forces redundant data paths into a standby (blocked) state. If a network segment in
the spanning tree fails and a redundant path exists, the spanning-tree algorithm recalculates the
spanning-tree topology and activates the standby path. Switches send and receive spanning-tree
frames, called bridge protocol data units (BPDUs), at regular intervals. The switches do not
forward these frames but use them to construct a loop-free path. BPDUs contain information about
the sending switch and its ports, including switch and MAC addresses, switch priority, port priority,
and path cost. Spanning tree uses this information to elect the root switch and root port for the
switched network and the root port and designated port for each switched segment.
When two ports on a switch are part of a loop, the spanning-tree port priority and path cost
settings control which port is put in the forwarding state and which is put in the blocking state. The
spanning-tree port priority value represents the location of a port in the network topology and how
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Cisco 300-115 Exam
well it is located to pass traffic. The path cost value represents the media speed.
Reference:
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/122_55_se/configuration/guide/3750xscg/swstp.html

QUESTION NO: 30
A network engineer must set the load balance method on an existing port channel. Which action
must be done to apply a new load balancing method?
A. Configure the new load balancing method using port-channel load-balance.
B. Adjust the switch SDM back to “default”.
C. Ensure that IP CEF is enabled globally to support all load balancing methods.
D. Upgrade the PFC to support the latest load balancing methods.
Answer: A
Explanation:
Example:
EtherChannel balances the traffic load across the links in a channel through the reduction of part
of the binary pattern that the addresses in the frame form to a numerical value that selects one of
the links in the channel. EtherChannel load balancing can use MAC addresses or IP addresses,
source or destination addresses, or both source and destination addresses. The mode applies to
all EtherChannels that are configured on the switch. You configure the load balancing and
forwarding method with use of the port-channel load-balance {dst-ip | dst-mac | src-dst-ip |
src-dst-mac | src-ip | src-mac} global configuration command.
Reference: http://www.cisco.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4.html

QUESTION NO: 31
Refer to the exhibit.

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shtml QUESTION NO: 32 While doing network discovery using Cisco Discovery Protocol.com/en/US/products/hw/switches/ps708/products_tech_note09186a008015c612.com 29 . B. E. Cisco Discovery Protocol logging options "Pass Any Exam. logging buffered D. What is causing the line protocol on this interface to be shown as down? A. C. D. Cisco Discovery Protocol source interface E.www. Reference: http://www. Answer: C Explanation: With the SAPN destination port." . it is found that rapid error tracking is not currently enabled. There is a layer 1 physical issue. The interface is configured as the target of the SPAN session. Cisco IOS Embedded Event Manager C. The interface shows the port in this state in order to make it evident that the port is currently not usable as a production port.Cisco 300-115 Exam A network engineer investigates a recent network failure and notices that one of the interfaces on the switch is still down. Any Time. Cisco Discovery Protocol version 2 B. The interface is configured as the source of the SPAN session.actualtests. There is a speed mismatch on the interface. the state of the destination port is up/down by design. There is a duplex mismatch on the interface.cisco. Which option must be enabled to allow for enhanced reporting mechanisms using Cisco Discovery Protocol? A. This is the normal operational state for SPAN destinations.

Any Time.cisco.cisco.com/en/US/docs/switches/lan/catalyst3550/software/release/12.1_13_ea1/config uration/guide/swvlan. 1 to 4094. VTP pruning B.xml&pid=2&converted=0 QUESTION NO: 33 Which technique allows specific VLANs to be strictly permitted by the administrator? A." .actualtests.Cisco 300-115 Exam Answer: A Explanation: • CDP Version 1 — This is the first version of CDP which was used for the discovery of Cisco devices in the network.html QUESTION NO: 34 "Pass Any Exam. All VLAN IDs. This is the default version on all switches. a trunk port sends traffic to and receives traffic from all VLANs.www.aspx?docid=0ed03cbac49b446ab390a657917d817c_Ci sco_Discovery_Protocol_CDP__Properties_Settings_on_Sx500_S. VLAN access-list E. you can remove VLANs from the allowed list. L2P tunneling Answer: C Explanation: By default. use the “switchport trunk allowed vlan remove vlan-list” interface configuration command to remove specific VLANs from the allowed list. Reference: http://www. Reference: http://sbkb. which is used to track down errors and minimize costly downtime. preventing traffic from those VLANs from passing over the trunk. It allows you to track instances even if the native VLAN ID or port duplex states do not match between connecting devices. are allowed on each trunk. To restrict the traffic a trunk carries. trunk allowed VLANs D. However. transparent bridging C. This version is mainly used for backward compatibility. • CDP Version 2 — This is the most recent version of CDP which has enhanced features such as rapid reporting mechanism.com/CiscoSB/GetArticle.com 30 .

the switchport trunk encapsulation [dot1q | isl | negotiate] interface command must be used prior to the switchport mode trunk command. the IT manager has prohibited users from dynamically establishing trunks with their associated upstream switch.) A. but may be disabled. DTP causes increased traffic. Enable switchport block on access ports.com/articles/article. and is enabled by default.asp?p=2181837&seqNum=8 QUESTION NO: 35 Which two protocols can be automatically negotiated between switches for trunking? (Choose two. Configure trunk and access interfaces manually. Disable DTP on a per interface basis. Reference: https://learningnetwork. You can use this command only when the interface switchport mode is access or trunk.cisco.F Explanation: Switches such as the Catalyst 3550 that are capable of either 802.ciscopress. DTP C. Which two actions can prevent interface trunking? (Choose two. To disable DTP. You must manually configure the neighboring interface as a trunk interface to establish a trunk link. Apply BPDU guard and BPDU filter. Any Time.1Q or ISL trunking encapsulation.actualtests. B. DLCI F. Answer: A.” This prevents the interface from generating DTP frames. configure “switchport nonegotiate. Reference: http://www.B Explanation: The Dynamic Trunking Protocol (DTP) is used to negotiate forming a trunk between two Cisco devices.Cisco 300-115 Exam For security reasons. HDLC E. D.com/servlet/JiveServlet/previewBody/14792-102-157313/Dynamic%20Trunking%20Protocol.) A. PPP B.com 31 . DOT1Q Answer: C.www. otherwise the link will be a non-trunking link. C. ISL D.PDF "Pass Any Exam." .

the secret key from the password string is saved in the VLAN database file. D. Answer: D Explanation: VTP should never need to have the switch reloaded or the VTP process to restart in order for it to work. C. •Support for extended range VLAN (VLANs 1006 to 4094) database propagation. VTP must be stopped and restarted on the server. The first thing that should be done is to verify that the trunk ports are connected and up." . but it does not appear in plain text in the configuration. VTP "Pass Any Exam. Verify connected trunk ports. After verifying all VTP settings. After each update to the VTP server. The VTP version number must be set to version 3. The VTP server must be reloaded. QUESTION NO: 37 After configuring new data VLANs 1020 through 1030 on the VTP server. When you enter the secret keyword. it takes up to 4 hours propagate. Answer: B Explanation: VTP version 3 supports these features that are not supported in version 1 or version 2: •Enhanced authentication—You can configure the authentication as hidden or secret. B. E.Cisco 300-115 Exam QUESTION NO: 36 A network is running VTPv2. Reload the new switch. Restart the VTP process on the new switch.actualtests.www. Another switch in the domain has a higher revision number than the server. When hidden. the network engineer notices that the new switch is not receiving the list of VLANs from the server. B. Any Time. the key associated with the password is saved in hexadecimal format in the running configuration. You must reenter the password if you enter a takeover command in the domain. Instead.com 32 . you can directly configure the password secret key. D. C. What is the problem? A. a network engineer notices that none of the VTP clients are receiving the updates. Which action resolves this problem? A. Reload the VTP server.

Cisco 300-115 Exam
versions 1 and 2 propagate only VLANs 1 to 1005. If extended VLANs are configured, you
cannot convert from VTP version 3 to version 1 or 2.
Reference:
http://www.cisco.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_52_se/configur
ation/guide/swvtp.html#wp1316856

QUESTION NO: 38
A network engineer is extending a LAN segment between two geographically separated data
centers. Which enhancement to a spanning-tree design prevents unnecessary traffic from crossing
the extended LAN segment?
A. Modify the spanning-tree priorities to dictate the traffic flow.
B. Create a Layer 3 transit VLAN to segment the traffic between the sites.
C. Use VTP pruning on the trunk interfaces.
D. Configure manual trunk pruning between the two locations.
Answer: C
Explanation:
Pruning unnecessary VLANs from the trunk can be performed with one of two methods:
• Manual pruning of the unnecessary VLAN on the trunk—This is the best method, and it avoids
the use of the spanning tree. Instead, the method runs the pruned VLAN on trunks.
• VTP pruning—Avoid this method if the goal is to reduce the number of STP instances. VTPpruned VLANs on a trunk are still part of the spanning tree. Therefore, VTP-pruned VLANs do not
reduce the number of spanning tree port instances.
Since the question asked for the choice that is an enhancement to the STP design, VTP pruning is
the best choice.
Reference:
http://www.cisco.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613.shtml

QUESTION NO: 39
The network manager has requested that several new VLANs (VLAN 10, 20, and 30) are allowed
to traverse the switch trunk interface. After the command switchport trunk allowed vlan 10,20,30 is
issued, all other existing VLANs no longer pass traffic over the trunk. What is the root cause of the
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Cisco 300-115 Exam
problem?
A. The command effectively removed all other working VLANs and replaced them with the new
VLANs.
B. VTP pruning removed all unused VLANs.
C. ISL was unable to encapsulate more than the already permitted VLANs across the trunk.
D. Allowing additional VLANs across the trunk introduced a loop in the network.
Answer: A
Explanation:
The “switchport trunk allowed vlan” command will only allow the specified VLANs, and overwrite
any others that were previously defined. You would also need to explicitly allow the other working
VLANs to this configuration command, or use the “issue the switchport trunk allowed vlan add
vlan-list” command instead to add these 3 VLANS to the other defined allowed VLANs.
Reference: https://supportforums.cisco.com/document/11836/how-define-vlans-allowed-trunk-link

QUESTION NO: 40
When you design a switched network using VTPv2, how many VLANs can be used to carry user
traffic?
A. 1000
B. 1001
C. 1024
D. 2048
E. 4095
F. 4096
Answer: B
Explanation:
VTP versions 1 and 2 Supports normal VLAN numbers (1-1001). Only VTP version 3 supports
extended VLANs (1-4095).
Reference: http://cciememo.blogspot.com/2012/11/difference-between-vtp-versions.html

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Cisco 300-115 Exam
QUESTION NO: 41
What does the command vlan dot1q tag native accomplish when configured under global
configuration?
A. All frames within the native VLAN are tagged, except when the native VLAN is set to 1.
B. It allows control traffic to pass using the non-default VLAN.
C. It removes the 4-byte dot1q tag from every frame that traverses the trunk interface(s).
D. Control traffic is tagged.
Answer: D
Explanation:
The “vlan dot1q tag native” will tag all untagged frames, including control traffic, with the defined
native VLAN.

QUESTION NO: 42
A network engineer has just deployed a non-Cisco device in the network and wants to get
information about it from a connected device. Cisco Discovery Protocol is not supported, so the
open standard protocol must be configured. Which protocol does the network engineer configure
on both devices to accomplish this?
A. IRDP
B. LLDP
C. NDP
D. LLTD
Answer: B
Explanation:
The Link Layer Discovery Protocol (LLDP) is a vendor-neutral link layer protocol in the Internet
Protocol Suite used by network devices for advertising their identity, capabilities, and neighbors on
an IEEE 802 local area network, principally wired Ethernet. LLDP performs functions similar to
several proprietary protocols, such as the Cisco Discovery Protocol (CDP).
Reference: http://en.wikipedia.org/wiki/Link_Layer_Discovery_Protocol

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issue the switchport trunk vlan-Iist interface configuration command. Which option can be configured to accomplish this? A. Which spanning-tree feature satisfies this requirement? A. Spanning-Tree FastPort D. Any Time. perform these steps: 1." . For Integrated Cisco IOS Software based switches. VACL D.com/document/11836/how-define-vlans-allowed-trunk-link QUESTION NO: 44 For client server failover purposes. This keeps traffic from the VLANs from passing over the trunk link. Spanning-Tree Fast Forward Answer: D Explanation: "Pass Any Exam. Spanning-Tree PortFast E. VLANs 1 through 1005 are allowed on each trunk by default. Reference: https://supportforums. they require the switchport to enter a forwarding state immediately. allowed VLAN list B. the application server team has indicated that they must not have the standard 30 second delay before their switchport enters a forwarding state. Spanning-Tree Timers C. Note: The allowed VLAN list on both the ends of the trunk link should be the same. all of the configured VLANs are allowed to send and receive traffic across the link. This removes specific VLANs from the allowed list.com 36 . To restrict the traffic that a trInk carries. VLAN traffic can be removed from the allowed list.www. L2P tunneling Answer: A Explanation: When a trunk link is established.actualtests. Rapid Spanning-Tree B.Cisco 300-115 Exam QUESTION NO: 43 A manager tells the network engineer to permit only certain VLANs across a specific trunk interface. VTP pruning C. However.cisco. For their disaster recovery feature to operate successfully.

com/library/content.aspx?b=CCNP_Studies_Switching&seqNum=36 QUESTION NO: 45 Which command does a network engineer use to verify the spanning-tree status for VLAN 10? A. PortFast immediately transitions the port into STP forwarding mode upon linkup.informit." .24 Switch-C(config-if-range)# sp–nning-tree portfast Reference: http://www. switch# show spanning-tree brief D.f2d2. Any Time. Example configuration: Switch-C# configure terminal Switch-C(config)# interface range fa0/3 .www. switch# show spanning-tree bridge C.4180 "Pass Any Exam.com 37 . Example output: SW2#show spanning-tree vlan 10 VLAN0010 Spanning tree enabled protocol rstp Root ID Priority 24586 Address 0014. switch# show spanning-tree vlan 10 brief Answer: A Explanation: Command Description show spanning-tree Displays information about the spanning-tree state. the port eventually transitions into STP blocking mode. switch# show spanning-tree summary E. The port still participates in STP.Cisco 300-115 Exam In order to allow immediate transition of the port into forwarding state. enable the STP PortFast feature. switch# show spanning-tree vlan 10 B.actualtests. So if the port is to be a part of the loop.

actualtests. a switch will have a domain name of NULL and no password.--------.com/en/US/docs/ios/lanswitch/command/reference/lsw_s2. Summary advertisements – sent out every 300 seconds and every time a change occurs on the VLAN database. Any Time. VTP summary advertisements are sent out of all ports with the new domain name. Switches with higher revisio“ num”ers does not accept the new domain name. All other switches with the default domain name become VTP clients.Nbr Type ------------------.216 P2p Po23 Altn BLK 9 128.com 38 . C. Contained in a summary advertisement: •VTP version •Domain name •Configuration revision number •Time stamp "Pass Any Exam.9000 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300 sec Interface Role Sts Cost Prio. and the configuration revision number. If all switches currently have the default VTP domain name "null". B. Answer: C Explanation: By default. If the switch hears a VTP advertisement it will automatically learn the VTP domain name. VLANs.--------------------------Po21 Root FWD 9 128.www." .--.57d8.cisco.-------. The switch with the non-default domain name restores back to "null" upon reboot.html QUESTION NO: 46 A new network that consists of several switches has been connected together via trunking interfaces.---.Cisco 300-115 Exam Cost 9 Port 216 (Port-channel21) Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Bridge ID Priority 32778 (priority 32768 sys-id-ext 10) Address 001c.232 P2p Reference: http://www. which statement describes what happens when“a do”ain name is configured on one of the switches? A. D.

RPVST+ Answer: C Explanation: Multiple Spanning Tree (MST) extends the IEEE 802.1w RST algorithm to multiple spanning trees. MST D.dionicio. Any Time. uses a minimum number of STP instances to match the number of physical topologies present. there are 1000 VLANs. on the other hand.net/configuring-cisco-vtp/ QUESTION NO: 47 A network engineer is setting up a new switched network. PVRST+ runs STP instances for each VLAN and does not take into consideration the physical topology that might not require many different STP topologies. The network is expected to grow and add many new VLANs in the future. MST. Figure 3-15 shows a common network design. and the network administrator typically seeks to achieve load balancing on the access switch uplinks based on even or odd VLANs—or any other scheme deemed appropriate. In this setup.com 39 ." . PVST C.www.actualtests.Cisco 300-115 Exam •MD5 encryption hash code Reference: https://rowell. PVST+ E. featuring an access Switch A. connected to two Building Distribution submodule Switches D1 and D2. The main purpose of MST is to reduce the total number of spanning-tree instances to match the physical topology of the network and thus reduce the CPU cycles of a switch. "Pass Any Exam. Which Spanning Tree Protocol should be used to reduce switch resources and managerial burdens that are associated with multiple spanning-tree instances? A. RSTP B.

Cisco 300-115 Exam Figure 3-15: VLAN Load Balancing Figure 3-15 illustrates two links and 1000 VLANs.2_55_se /configuration/guide/swsdm. To allocate hardware resources for different usages.www. SDM templates are used to create Layer 3 interfaces (switch virtual interfaces) to permit hosts in one VLAN to communicate with hosts in another VLAN. use the default template to balance resources. depending on how the switch is used in the network.html QUESTION NO: 48 Which statement about the use of SDM templates in a Cisco switch is true? A. the switch SDM templates prioritize system resources to optimize support for certain features. You can select a template to provide maximum system usage for some functions. depending on how the switch is used in the network.com/2011/05/chapter-03-implementing-spanningtree_19. for example. Answer: A Explanation: You can use SDM templates to configure system resources in the switch to optimize support for specific features.actualtests. each switch needs to maintain only two spanning trees. Reference: http://www. Reference: http://ciscodocuments.pdf "Pass Any Exam. and use access template to obtain maximum ACL usage. SDM templates are used to configure ACLs that protect networks and specific hosts from unnecessary or unwanted traffic. B. E.com 40 . Any Time.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12. reducing the need for switch resources. SDM templates are configured by accessing the switch using the web interface.cisco. SDM templates are used to configure a set of ACLs that allows the users to manage the flow of traffic handled by the route processor. The 1000 VLANs map to two MST instances.blogspot. Rather than maintaining 1000 spanning trees. C. D. SDM templates are used to configure system resources in the switch to optimize support for specific features." .

Cisco 300-115 Exam QUESTION NO: 49 Which SDM template disables routing and supports the maximum number of unicast MAC addresses? A. default D. • VLANs—The VLAN template disables routing and supports the maximum number of unicast MAC addresses. routing Answer: A Explanation: "Pass Any Exam. access C. default C.actualtests.com/en/US/docs/switches/lan/catalyst3560/software/release/12." .pdf QUESTION NO: 50 Which SDM template is the most appropriate for a Layer 2 switch that provides connectivity to a large number of clients? A. the switch SDM templates prioritize system resources to optimize support for certain features.com 41 . • Routing—The routing template maximizes system resources for Ipv4 unicast routing. routing Answer: A Explanation: To allocate ternary content addressable memory (TCAM) resources for different usages. It would typically be selected for a Layer 2 switch. VLAN B.2_55_se/configur ation/guide/swsdm. You can select SDM templates to optimize these features: • Access—The access template maximizes system resources for access control lists (ACLs) to accommodate a large number of ACLs. access D.cisco. VLAN B. • Default—The default template gives balance to all functions. Any Time. typically required for a router or aggregator in the center of a network.www. Reference: http://www.

Any Time. what is the default period of time after which a MAC address ages out and is discarded? A. • VLANs—The VLAN template disables routing and supports the maximum number of unicast MAC addresses (clients). 180 seconds C. perform this task: Command Purpose Step 1 switch# configure terminal Enters configuration mode. You can select SDM templates to optimize these features: • Access—The access template maximizes system resources for access control lists (ACLs) to accommodate a large number of ACLs. It would typically be selected for a Layer 2 switch. typically required for a router or aggregator in the center of a network. The range is from 0 to 1000000.com 42 . • Routing—The routing template maximizes system resources for Ipv4 unicast routing." . the switch SDM templates prioritize system resources to optimize support for certain features. Entering the value 0 disables the MAC "Pass Any Exam. the default is 300 seconds. • Default—The default template gives balance to all functions. Reference: http://www.actualtests.www.cisco. Step 2 switch(config)# mac-address-table aging-time seconds [vlan vlan_id] Specifies the time before an entry ages out and is discarded from the MAC address table. 100 seconds B. 300 seconds D.pdf QUESTION NO: 51 In a Cisco switch.com/en/US/docs/switches/lan/catalyst3560/software/release/12.Cisco 300-115 Exam To allocate ternary content addressable memory (TCAM) resources for different usages.2_55_se/configur ation/guide/swsdm. 600 seconds Answer: C Explanation: To configure the aging time for all MAC addresses.

Reference: http://www.actualtests.com/en/US/docs/ios/lanswitch/command/reference/lsw_m1.cisco.www. use the no form of this command. Any Time.com/en/US/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/MAC Address. Syslog (Optional) Specifies the syslogging facility when the MAC-move notification detects the first instance of the MAC move." . Mac-address-table notification mac-move [counter [syslog]] no mac-address-table notification mac-move [counter [syslog]] Syntax Description counter (Optional) Specifies the MAC-move counter feature. use the mac-address-table notification mac-move command in global configuration mode. More than 64 MAC addresses are added to the content-addressable memory. C. when is a syslog message generated? A.Cisco 300-115 Exam aging.html "Pass Any Exam. A MAC address or host moves between different switch ports. the aging specification applies to all VLANs.com 43 .cisco. To disable MAC-move notification. A new MAC address is added to the content-addressable memory. If a VLAN is not specified. Usage Guidelines MAC-move notification generates a syslog message whenever a MAC address or host moves between different switch ports. D.html QUESTION NO: 52 If a network engineer applies the command mac-address-table notification mac-move on a Cisco switch port. A new MAC address is removed from the content-addressable memory. Reference: http://www. Answer: A Explanation: mac-address-table notification mac-move To enable MAC-move notification. B.

-------------- "Pass Any Exam. Any Time." .www.shtml QUESTION NO: 54 What is the default value for the errdisable recovery interval in a Cisco switch? A. cat6knative#show errdisable recovery ErrDisable Reason Timer Status ----------------.actualtests. you must reenable the ports manually. 600 seconds Answer: C Explanation: After you fix the root problem.cisco. 30 seconds B. The reason can be: Reference: http://www. routing loop B. 100 seconds C. security violation Answer: D Explanation: There are various reasons for the interface to go into errdisable. cable unplugged C.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b. the ports are still disabled if you have not configured errdisable recovery on the switch.com 44 . The errdisable recovery command allows you to choose the type of errors that automatically reenable the ports after a specified amount of time.Cisco 300-115 Exam QUESTION NO: 53 Which option is a possible cause for an errdisabled interface? A. STP loop guard D. In this case. 43sernads D. Issue the shutdown command and then the no shutdown interface mode command on the associated interface in order to manually reenable the ports. The show errdisable recovery command shows the default error-disable recovery state for all the possible conditions.

It specifically provides "Pass Any Exam. B.actualtests. Reference: http://www. Any Time. LLDP-MED is an extension to LLDP that operates only between endpoint devices. LLDP-MED is an extension to LLDP that operates only between network devices. C. by default.cisco.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b.www.shtml QUESTION NO: 55 Which statement about LLDP-MED is true? A. Answer: A Explanation: LLDP for Media Endpoint Devices (LLDP-MED) is an extension to LLDP that operates between endpoint devices such as IP phones and network devices such as switches.Cisco 300-115 Exam udld Disabled bpduguard Disabled security-violatio Disabled channel-misconfig Disabled pagp-flap Disabled dtp-flap Disabled link-flap Disabled l2ptguard Disabled psecure-violation Disabled gbic-invalid Disabled dhcp-rate-limit Disabled mac-limit Disabled unicast-flood Disabled arp-inspection Disabled Timer interval: 300 seconds Interfaces that will be enabled at the next timeout: Note: The default timeout interval is 300 seconds and. the timeout feature is disabled. LLDP-MED is an extension to LLDP that operates between endpoint devices and network devices. LLDP-MED is an extension to LLDP that operates between routers that run BGP." . D.com 45 .

net/subdom/network/index. Each device sends periodic advertisements to a central device that builds the network topology.com/en/US/docs/switches/metro/me3400/software/release/12. memory errors Answer: A "Pass Any Exam. Any Time. Reference: http://network. D. native VLAN IDs.pdf QUESTION NO: 56 Which statement about Cisco devices learning about each other through Cisco Discovery Protocol is true? A.2_58_se/configurat ion/guide/swlldp.www. B. memory errors.spravcesite. memory errors C. hardware platform B. native VLAN IDs.cisco. Each device broadcasts periodic advertisements to all of its neighbors. C. Each device sends periodic advertisements to all IP addresses in its ARP table. native VLAN IDs. Power over Ethernet.com 46 .Cisco 300-115 Exam support for voice over IP (VoIP) applications and provides additional TLVs for capabilities discovery. out each connected network interface. port-duplex.actualtests. hardware platform. and inventory management. These multicast packets may be received by Cisco switches and other networking devices that support CDP into their connected network interface.php?id=cdp QUESTION NO: 57 Which option lists the information that is contained in a Cisco Discovery Protocol advertisement? A. port-duplex. Answer: A Explanation: Cisco devices send periodic CDP announcements to the multicast destination address 01-00-0ccc-cc-cc. port-duplex. Each device sends periodic advertisements to multicast address 01:00:0C:CC:CC:CC. Reference: http://www. hardware platform D." . network policy.

Port-ID TLV Identifies the port on which the CDP packet is sent. Full/Half Duplex TLV Indicates status (duplex configuration) of CDP broadcast interface. Native VLAN TLV Indicates.com/en/US/docs/ios/12_2/configfun/configuration/guide/fcf015.Cisco 300-115 Exam Explanation: Type-Length-Value fields (TLVs) are blocks of information embedded in CDP advertisements. for example.actualtests.com 47 . Table 21 summarizes the TLV definitions for CDP advertisements.cisco. Platform TLV Describes the hardware platform name of the device. Table 21 Type-Length-Value Definitions for CDPv2 TLV Definition Device-ID TLV Identifies the device name in the form of a character string.html QUESTION NO: 58 Which option describes a limitation of LLDP? "Pass Any Exam. IP Network Prefix TLV Contains a list of network prefixes to which the sending device can forward IP packets. Any Time. Version TLV Contains information about the software release version on which the device is running. per interface.1Q protocol. Capabilities TLV Describes the functional capability for the device in the form of a device type." . VTP Management Domain TLV Advertises the system’s configured VTP management domain name-string.www. Cisco 4500. the assumed VLAN for untagged packets on the interface. Reference: http://www. Eth 1/0. CDP learns the native VLAN for an interface. Address TLV Contains a list of network addresses of both receiving and sending devices. for example. This feature is implemented only for interfaces that support the IEEE 802. Used by network operators to diagnose connectivity problems between adjacent network elements. This information is in the form of the interface protocol and port number. for example. Used by network operators to verify VTP domain configuration in adjacent network nodes. a switch.

LLDP can discover only Windows servers.cisco.html "Pass Any Exam. LLDP cannot provide information about VTP.com 48 .Cisco 300-115 Exam A. LLDP does not support TLVs. LLDP can discover up to two devices per port.www. B.actualtests. C. Any Time. where the connection may be unidirectional No Port UniDirectional Mode TLV Management address Management Address TLV Management-AddressTLV Allows for organizational unique TLVs Yes No Reference: http://www. Answer: A Explanation: LLDP Versus Cisco Discovery Protocol TLV Comparison Function Description LLDP TLV Cisco Discovery Protocol TLV IP network prefix support-Used to send the network prefix and used for ODR No IP Network Prefix TLV Hello piggybacking-Can be used to piggy back hello messages from other protocols No Protocol Hello TLV Maximum-transmission-unit (MTU) support-Specifies the size of the MTU No MTU TLV External port support-Used to identify the card terminating the fiber in the case of wavelengthdivision multiplexing (WDM) No External Port-ID TLV VTP management support No VTP Management Domain TLV Port unidirectional mode-Used in fiber." .com/en/US/technologies/tk652/tk701/technologies_white_paper0900aecd804cd4 6d. D.

2SX/configuration/guide/udld. B. normal and aggressive B.Cisco 300-115 Exam QUESTION NO: 59 Which statement about the UDLD protocol is true? A. normal and active D.cisco.www. Answer: A Explanation: The Cisco-proprietary UDLD protocol monitors the physical configuration of the links between devices and ports that support UDLD. Reference: http://www.com 49 . Any Time. C. UDLD puts the affected port into the errdisabled state and alerts the user. and neighbors on a local area network." . D. UDLD detects the existence of unidirectional links.ht ml QUESTION NO: 60 Which option lists the modes that are available for configuring UDLD on a Cisco switch? A. capabilities. UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to advertise their identity. and neighbors on a local area network. UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to monitor the physical status of links and detect unidirectional failures. active and aggressive C. UDLD is a standardized Layer 2 protocol that enables devices to monitor the physical status of links and detect unidirectional failures. normal and passive E.com/en/US/docs/switches/lan/catalyst6500/ios/12. normal and standby Answer: A Explanation: The Cisco-proprietary UDLD protocol monitors the physical configuration of the links between "Pass Any Exam. When a unidirectional link is detected. UDLD is a standardized Layer 2 protocol that enables devices to advertise their identity. capabilities.actualtests.

Cisco 300-115 Exam devices and ports that support UDLD.com 50 .actualtests.cisco. UDLD can operate in either normal or aggressive mode. UDLD puts the affected port into the errdisabled state and alerts the user. UDLD detects the existence of unidirectional links.ht ml QUESTION NO: 61 What is the default interval at which Cisco devices send Cisco Discovery Protocol advertisements? A. When a unidirectional link is detected.www.2SX/configuration/guide/udld. directly connected devices.com/en/US/docs/switches/lan/catalyst6500/ios/12. Cisco Discovery Protocol is enabled by default.cisco. Any Time.com/en/US/docs/ios-xml/ios/cdp/configuration/15-mt/nm-cdpdiscover. media-independent. Each device configured for Cisco Discovery Protocol advertises at least one address at which the device can receive messages and sends periodic advertisements (messages) to the well-known multicast address 01:00:0C:CC:CC:CC." . and network-independent protocol that networking applications use to learn about nearby.html QUESTION NO: 62 "Pass Any Exam. by default. which indicates the length of time a receiving device should hold Cisco Discovery Protocol information before discarding it. Reference: http://www. 300 seconds Answer: B Explanation: Cisco Discovery Protocol is a Layer 2. 60 seconds C. They also listen to messages to learn when interfaces on other devices are up or go down. Advertisements supported and configured in Cisco software are sent. every 60 seconds. 30 seconds B. 120 seconds D. Reference: http://www. Advertisements contain time-to-live information. Devices discover each other by listening at that address.

cisco.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12." . D. To disable CDP on an interface. Extended VLANs are only supported in version 3 and not in versions 1 or 2. CDP is disabled by default and can be enabled globally with the command cdp enable.com 51 .actualtests. use the “no cdp run” command.com/en/US/docs/ios/12_2/configfun/command/reference/frf015. CDP is disabled by default and can be enabled globally with the command cdp run. VLANs in the range 1006 to 4094 are removed from VTP control. Reference: http://www.ht ml "Pass Any Exam. transparent B. C. client C. server D. CDP is enabled by default and can be disabled globally with the command no cdp run. If converting from VTP version 3 to VTP version 2.2SX/configuration/guide/vtp. CDP also is enabled on supported interfaces by default.Cisco 300-115 Exam Which statement about Cisco Discovery Protocol configuration on a Cisco switch is true? A. when a switch is configured to use VTP versions 1 or 2? A. Reference: http://www. To disable it globally.www. Answer: A Explanation: CDP is enabled on your router by default. B. which means the Cisco IOS software will receive CDP information.html#wp1017573 QUESTION NO: 63 Which VTP mode is needed to configure an extended VLAN. Extended-range VLANs are supported only in VTP version 3. Answer: D Explanation: VTP version 1 and version 2 support VLANs 1 to 1000 only. CDP is enabled by default and can be disabled globally with the command no cdp enable. use the “no cdp enable interface” configuration command. Any Time.

the port should be configured as a trunk port.actualtests.www.org/wiki/IEEE_802.Cisco 300-115 Exam QUESTION NO: 64 What is the size of the VLAN field inside an 802. 0 B. 1 C.1Q QUESTION NO: 65 What is the maximum number of VLANs that can be assigned to an access switchport without a voice VLAN? A." . 1024 Answer: B Explanation: A standard (non-voice VLAN port) access switch port can belong to only a single VLAN. 12-bit C.094 VLANs Reference: http://en.1q frame? A. All other values may be used as VLAN identifiers. 16-bit D. The hexadecimal values of 0x000 and 0xFFF are reserved.wikipedia. allowing up to 4. Any Time. 2 D. If more than one VLAN is needed. QUESTION NO: 66 "Pass Any Exam. 32-bit Answer: B Explanation: The VLAN field is a 12-bit field specifying the VLAN to which the frame belongs. 8-bit B.com 52 .

www." .actualtests.com 53 . Any Time. Which option shows the expected result if a show vlan command is issued? A) B) C) "Pass Any Exam.Cisco 300-115 Exam Refer to the exhibit.

www. Exhibit D Answer: A Explanation: In this case. Exhibit A B. the port has been configured both as a trunk and as a switchport in data vlan 10.actualtests. Any Time. the port will actually be used as a trunk. so even though Cisco IOS will accept both." . QUESTION NO: 67 Which feature is automatically enabled when a voice VLAN is configured. but not automatically disabled when a voice VLAN is removed? "Pass Any Exam. ignoring the switchport access VLAN 10 command. a port can not be both.Cisco 300-115 Exam D) A.com 54 . Exhibit C D. Exhibit B C. Obviously.

Cisco 300-115 Exam A. within the Ethernet FCS D. portfast B. When you disable voice VLAN.html QUESTION NO: 68 In which portion of the frame is the 802. within the Ethernet payload C. spanning tree D. •The Port Fast feature is automatically enabled when voice VLAN is configured.1_22_ea11x/conf iguration/guide/swvoip. within the Ethernet header B.com/en/US/docs/switches/lan/catalyst2950/software/release/12. Reference: http://www. within the Ethernet source MAC address Answer: A Explanation: Frame format Insertion of 802.actualtests." . the Port Fast feature is not automatically disabled. storm control Answer: A Explanation: Voice VLAN Configuration Guidelines •You should configure voice VLAN on switch access ports.www. Any Time. Use the show vlan privileged EXEC command to see if the VLAN is present (listed in the display).1Q tag in an Ethernet frame "Pass Any Exam.1q header found? A. •The voice VLAN should be present and active on the switch for the IP phone to correctly communicate on the voice VLAN.cisco. port-security C.com 55 .

VTP pruning B. Any Time." .orbit-computer-solutions.com 56 . VLANs 2-1001 D.1Q does not encapsulate the original frame.www. port-security C. Reference: http://www.Cisco 300-115 Exam 802. By default. Instead. bpdguard Answer: A Explanation: "Pass Any Exam. storm control D. but VLAN 1 can’t be pruned because it’s an administrative VLAN.actualtests. VLANs 2 – 1001 are pruning eligible.php QUESTION NO: 70 Which feature must be enabled to eliminate the broadcasting of all unknown traffic to switches that are not participating in the specific VLAN? A. VLANs 2-4094 Answer: C Explanation: VTP pruning should only be enabled on VTP servers.org/wiki/IEEE_802.com/VTP-Pruning. it adds a 32-bit field between the source MAC address and the EtherType/length fields of the original frame Reference: http://en. all the clients in the VTP domain will automatically enable VTP pruning.1Q QUESTION NO: 69 Which VLAN range is eligible to be pruned when a network engineer enables VTP pruning on a switch? A. Both VTP versions 1 and 2 supports pruning. VLANs 1-4094 C. VLANs 1-1001 B.wikipedia. for Ethernet frames.

Enable VTP pruning and disable 802.html#vtp_pruning QUESTION NO: 71 Refer to the exhibit. All switches in the network receive all broadcasts. C.actualtests." . Disable VTP pruning and disable 802.www.Cisco 300-115 Exam VTP ensures that all switches in the VTP domain are aware of all VLANs.cisco. so to enable vlan 10 on this switch you will first need to change the VTP mode from client to server. B. However.com/c/en/us/support/docs/lan-switching/vtp/1055821.1q.com 57 . Any Time. there are occasions when VTP can create unnecessary traffic. Reference: http://www. Update the VTP revision number.1q. Change VTP mode to server and enable 802. All unknown unicasts and broadcasts in a VLAN are flooded over the entire VLAN. Answer: C Explanation: Only VTP servers can add new VLANs to the switched network.1q. The users in an engineering department that connect to the same access switch cannot access the network. D. "Pass Any Exam. even in situations in which few users are connected in that VLAN.1Q trunking to pass this new VLAN along to the other switches. Which action resolves this problem? A. you will need to enable 802. VTP pruning is a feature that you use in order to eliminate or prune this unnecessary traffic. Then. QUESTION NO: 72 Refer to the exhibit. The network engineer found that the engineering VLAN is missing from the database.

" . Which action resolves this problem? A. Disable DTP and document the VTP domain mismatch. Any Time.www. Answer: C Explanation: Since the number of existing VLANs differ on the switches (9 on A and 42 on B) we know that "Pass Any Exam.Cisco 300-115 Exam The network switches for two companies have been connected and manually configured for the required VLANs. B. D. Manually force trunking with switchport mode trunk on both switches. Enable the company B switch with the vtp mode server command.dat and ensure that the switch with lowest MAC address is the VTP server. C. but users in company A are not able to access network resources in company B when DTP is enabled.com 58 .actualtests. Delete vlan.

C. QUESTION NO: 74 Which statement about using native VLANs to carry untagged frames is true? A. Answer: A Explanation: "Pass Any Exam." .1Q and ISL.www. Any Time. B. dot1q VLAN trunking D.1Q is supported by multiple vendors since ISL is a Cisco proprietary protocol. Cisco Discovery Protocol version 2 carries native VLAN information.actualtests. QUESTION NO: 73 A network engineer must implement Ethernet links that are capable of transporting frames and IP traffic for different broadcast domains that are mutually isolated. Consider that this is a multivendor environment. Inter-Switch Link Answer: C Explanation: Here the question asks for transporting “frames and IP traffic for different broadcast domains that are mutually isolated” which is basically a long way of saying VLANs so trunking is needed to carry VLAN information. The only viable solution is that there is a DTP issues and so you must instead manually configure the trunk ports between these two switches so that the VLAN information can be sent to each switch. Cisco Discovery Protocol version 1 carries native VLAN information. There are 2 different methods for trunking. Of these. but versions 1 and 2 do not. but version 2 does not.com 59 .Cisco 300-115 Exam there is a problem with VTP or the trunking interfaces. 802. only 802. Which Cisco IOS switching feature can be used to achieve the task? A. Cisco Discovery Protocol version 1 and version 2 carry native VLAN information. Cisco Discovery Protocol version 3 carries native VLAN information. D. The VTP domain names do match and they are both VTP servers so there are no issues there. but version 1 does not. Link Aggregation Protocol at the access layer C. PPP encapsulation with a virtual template B.

Cisco 300-115 Exam Cisco Discovery Protocol (CDP) version 2 passes native VLAN information between Cisco switches. VLAN ID 1 should not be used for management traffic because its unsafe. VLAN spanning-tree in SW-2 is configured. however. spanning tree blocks local native VLAN traffic and the remote switch native VLAN traffic on the trunk. Native VLAN mismatches are detected via spanning tree and Cisco Discovery Protocol (CDP). not via DTP messages. Reference: http://www. both with native VLAN mismatch. but 1 (the default native VLAN) on the other switch.actualtests. Answer: C Explanation: Here we see that the native VLAN has been configured as 2013 on one switch. C. Failure to do this causes Cisco switches to partially shut down the trunk port because having mismatched native VLANs can result in spanning-tree loops.1q trunks are on both sides.com/library/content.asp?p=29803&seqNum=3 QUESTION NO: 75 Refer to the exhibit. Any Time. the trunk still remains up for other VLANs.www." .informit. If you use 802. A multilayer switch has been configured to send and receive encapsulated and tagged frames. you will see CDP error messages on the console output. VLAN 2013 on the multilayer switch is configured as the native VLAN. 802.ciscopress. spanning-tree bpdu-filter is enabled. you must ensure that you choose a common native VLAN for each port in the trunk. If you have a native VLAN mismatch.com 60 . B. D.1Q trunks.com/articles/article. If spanning tree detects a native VLAN mismatch.aspx?b=CCNP_Studies_Switching&seqNum=25 "Pass Any Exam. Reference: http://www. Which option is the cause of the spanning-tree error? A.

Upgrade to VTP version 3 for advanced feature set support. Any Time. access list C." . Answer: C Explanation: Manaully pruning the default VLAN (1) can only be done with the “switchport trunk allowed vlans remove” command. Reference: http://www. switchport trunk allowed VLAN D. Use trunk pruning vlan 1.actualtests. The “trunk pruning vlan 1” option is not a valid command. The “vtp pruning” command prunes VLANs automatically. which stops the inefficient flooding of frames where they are not needed. C.cisco. VLAN 1 is not VTP pruning eligible so it cannot be done via VTP pruning. VTP pruning B. B. "Pass Any Exam.Cisco 300-115 Exam QUESTION NO: 76 A network engineer must improve bandwidth and resource utilization on the switches by stopping the inefficient flooding of frames on trunk ports where the frames are not needed.html QUESTION NO: 77 Which action allows a network engineer to limit a default VLAN from being propagated across all trunks? A. Which Cisco IOS feature can be used to achieve this task? A.com/c/en/us/support/docs/switches/catalyst-6500-seriesswitches/24330-185. Enable VTP pruning on the VTP server. D.www. Manually prune default VLAN with switchport trunk allowed vlans remove. VLAN access-map Answer: A Explanation: Cisco advocates the benefits of pruning VLANs in order to reduce unnecessary frame flooding.com 61 .

www. Because the 802." .actualtests. 8-bytes except the native VLAN C.cisco. 4-bytes including native VLAN D. 4-bytes except the native VLAN B. you must configure all switches in the service-provider network to be able to process maximum frames by increasing the switch system MTU size to at least 1504 bytes.com/en/US/docs/switches/lan/catalyst3550/software/release/12.1Q tunneling (Q-in-Q) feature increases the frame size by 4 bytes when the extra tag is added. 8-bytes including native VLAN "Pass Any Exam.Cisco 300-115 Exam QUESTION NO: 78 What is required for a LAN switch to support 802. Support 1547 MTU only Answer: B Explanation: The default system MTU for traffic on Catalyst switches is 1500 bytes. Support less than 1500 MTU B. Support 1522 layer 3 IP and IPX packet D. How many bytes are added to each frame as a result of the configuration? A. Support 1504 MTU or higher C. Any Time. Reference: http://www.html QUESTION NO: 79 Refer to the exhibit.1_13_ea1/config uration/guide/swtunnel.com 62 .1q Q-in-Q encapsulation? A.

D. and on. Reference: http://www. QUESTION NO: 80 A network engineer configured a fault-tolerance link on Gigabit Ethernet links G0/1.cisco.html#wp1081491 QUESTION NO: 81 Which statement about the use of PagP link aggregation on a Cisco switch that is running Cisco IOS Software is true? A. Configure LACP port-priority on G0/1 to 65535. "Pass Any Exam. Answer: B Explanation: A LACP port priority is configured on each port using LACP. The valid range is from 1 to 65535. LACP uses the port priority with the port number to form the port identifier. Any Time. and G0/4 between two switches using Ethernet port-channel. desirable. Which action allows interface G0/1 to always actively forward traffic in the port-channel? A. Two bytes are used for the tag protocol identifier (TPID). The port priority determines which ports should be put in standby mode when there is a hardware limitation that prevents all compatible ports from aggregating. auto. PagP modes are off. desirabledesirable. Only the combinations auto-desirable.Cisco 300-115 Exam Answer: A Explanation: In 802. G0/2.www.1Q trunking.actualtests." . the other two bytes for tag control information (TCI). The port priority can be configured automatically or through the CLI. Configure G0/1 as half duplex and G0/2 as full duplex.com 63 . C. except the native VLAN. The default is 32768. G0/3. LACP traffic goes through G0/4 because it is the highest interface ID. Configure LACP port-priority on G0/1 to 1.com/c/en/us/td/docs/ios/12_2sb/feature/guide/gigeth. the lower the priority. and on-on allow the formation of a channel. The higher the number. all VLAN packets are tagged on the trunk link. B. A VLAN tag adds 4 bytes to the frame.

desirabledesirable. The PagP modes are explained below. desirabledesirable. desirable. Answer: A Explanation: PagP modes are off. and on.html QUESTION NO: 82 Refer to the exhibit. and on. and on-on allow the formation of a channel. and on-on allow the formation of a channel. desirable. desirable-desirable. "Pass Any Exam. and on. Only the combinations of auto-desirable. Only the combinations active-active. the device on the other side must have PagP set to on. desirable. Any Time. and on-on will allow a channel to be formed. and on-on will allow a channel to be formed.com 64 . such as a router. Only the combinations auto-desirable. and on.www.Cisco 300-115 Exam B. PagP modes are off. and on-on allow the formation of a channel. Only the combinations auto-auto. auto.com/c/en/us/support/docs/switches/catalyst-2900-xl-seriesswitches/21041-131. D. PagP modes are active. desirabledesirable. PagP modes are active. desirable.actualtests." . Only the combinations active-desirable. Reference: http://www. If a device on one side of the channel does not support PagP. desirabledesirable. C.cisco. active.

Link Aggregation Control Protocol Answer: B Explanation: PAgP modes are off. Port Combination Protocol D. and fa0/15 are all in Port Channel 12. "Pass Any Exam. Link Combination Control Protocol B. desirabledesirable. . which is only a PAgP mode. Only the combinations auto-desirable. fa0/14. Any Time. The Link Aggregate Control Protocol (LACP) trunking supports four modes of operation: In this example. we see that fa 0/13. auto. which is operating in desirable mode.www.com 65 . and on." . Port Aggregation Protocol C.actualtests. desirable.Cisco 300-115 Exam Which EtherChannel negotiation protocol is configured on the interface f0/13 – f0/15? A. and on-on will allow a channel to be formed.

and since the load balancing method is source MAC. as shown here: Server_Switch#sh etherchannel load-balance EtherChannel Load-Balancing Operational State (src-mac): Non-IP: Source MAC address IPv4: Source MAC address IPv6: Source IP address Server_Switch# HoweIer.com 66 . Answer: C Explanation: Since this traffic is coming from PC-1. the source MAC address will always be that of PC-1. "Pass Any Exam. D. The load balancing method should be changed to destination MAC. C." . Upgrade the switch IOS to IP services image. since the web server has two NICs traffic will be load balanced across both MAC addresses. To increase bandwidth. Change the load-balance method to dst-mac.www. Any Time.actualtests. Contact Cisco TAC to report a bug on the switch.Cisco 300-115 Exam QUESTION NO: 83 Refer to the exhibit. the network engineer configured an EtherChannel on interfaces Fa1/0 and Fa0/1 of the server farm switch. Which action can the engineer take to resolve this issue? A. traffic will only be using one of the port channel links. traffic is still slow. Users of PC-1 experience slow connection when a webpage is requested from the server. B. Disable EtherChannel load balancing.

auto. desirabledesirable. •PAgP does not group ports that operate at different speeds or port duplex. Any Time. all ports in the bundle are modified to match that VLAN.Cisco 300-115 Exam QUESTION NO: 84 A network engineer changed the port speed and duplex setting of an existing EtherChannel bundle that uses the PAgP protocol. PAgP changes the port speed and duplex for all ports in the bundle.html QUESTION NO: 85 Which statement about using EtherChannel on Cisco IOS switches is true? A." . PAgP drops the ports that do not match the configuration. If speed and duplex change when a bundle exists. The restrictions are: •PAgP does not form a bundle on ports that are configured for dynamic VLANs. and on-on allow the formation of a channel. The device on the other side must have PAgP set to on if a device on one side of the channel does not support PAgP. C. When a bundle already exists and a VLAN of a port is modified. PAgP does not change the port speed and duplex for all ports in the bundle until the switch is rebooted. Some restrictions are deliberately introduced into PAgP. A switch can support up to eight compatibly configured Ethernet interfaces in an EtherChannel.com 67 . Which statement describes what happens to all ports in the bundle? A.www. PAgP packets are sent between EtherChannel-capable ports in order to negotiate the formation of a channel. desirable. "Pass Any Exam.actualtests. such as a router. PAgP changes the port speed but not the duplex for all ports in the bundle.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. •PAgP modes are off. and on. Reference: http://www.cisco. Only the combinations auto-desirable. D. PAgP requires that all ports in the channel belong to the same VLAN or are configured as trunk ports. Answer: A Explanation: PAgP aids in the automatic creation of EtherChannel links. B. PAgP changes the port speed and duplex for all ports in the bundle.

Answer: A Explanation: An EtherChannel consists of individual Fast Ethernet or Gigabit Ethernet links bundled into a single logical link.Cisco 300-115 Exam The EtherChannel provides full-duplex bandwidth up to 800 Mbps only for Fast EtherChannel or 8 Gbps only for Gigabit EtherChannel. B.com 68 . The EtherChannel provides full-duplex bandwidth up to 800 Mbps (Fast EtherChannel) or 8 Gbps (Gigabit EtherChannel) between your switch and another switch or host. The EtherChannel provides full-duplex bandwidth up to 1000 Mbps only for Fast EtherChannel or 10 Gbps only for Gigabit EtherChannel. A switch can support up to 10 compatibly configured Ethernet interfaces in an EtherChannel.cisco. Each EtherChannel can consist of up to eight compatibly configured Ethernet interfaces. "Pass Any Exam. Any Time. The EtherChannel provides full-duplex bandwidth up to 1000 Mbps only for Fast EtherChannel or 8 Gbps only for Gigabit EtherChannel.actualtests. A switch can support up to eight compatibly configured Ethernet interfaces in an EtherChannel. The EtherChannel provides full-duplex bandwidth up to 800 Mbps only for Fast EtherChannel or 16 Gbps only for Gigabit EtherChannel. D.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. Reference: http://www. and all must be configured as either Layer 2 or Layer 3 interfaces.html QUESTION NO: 86 Refer to the exhibit.www." . All interfaces in each EtherChannel must be the same speed. C. A switch can support up to 10 compatibly configured Ethernet interfaces in an EtherChannel.

com 69 . The protocol used for this port channel shows as LACP. Fa0/14. Logical port Fa0/13. QUESTION NO: 87 What happens on a Cisco switch that runs Cisco IOS when an RSTP-configured switch receives "Pass Any Exam. Logical port Fa0/13. and the (SU) means they are in use and operating at layer 2.www. which is a standards based protocol. Fa0/14. Fa0/14. and Fa0/15 successfully formed a Layer 2 physical port-channel interface using a Cisco proprietary protocol." . and Fa0/15 successfully formed a Layer 3 port-channel interface using a Cisco proprietary protocol. as opposed to PagP. which is Cisco proprietary. Answer: A Explanation: These three ports show that they are in Port Channel 1. B. Fa0/14. and Fa0/15 successfully formed a Layer 3 physical port-channel interface using an open standard protocol. C. Physical port Fa0/13. D. and Fa0/15 successfully formed a Layer 2 port-channel interface using an open standard protocol. Physical port Fa0/13.actualtests. Any Time.Cisco 300-115 Exam Which statement about switch S1 is true? A.

4 Answer: C "Pass Any Exam." .www. When a port is initialized. 802. it responds with a 802. RSTP selectively sends 802.1d understands RSTP BPDUs because they are the same version.1D configuration BPDUs and TCN BPDUs on a per-port basis. C.1d does not understand RSTP BPDUs because they are different versions. but when a RSTP switch receives a 802. it does not respond with a 802. it responds with an 802.1d does not understand RSTP BPDUs because they are different versions. If the switch receives an 802.1d to communicate.1d to communicate. 1 B. but when a RSTP switch receives an 802. While this timer is active. it does not respond with a 802.1d BPDU. what is the total number of spanning-tree instances running on the switch? A.1D BPDU after the port migration-delay timer has expired. Any Time.1D switches. 3 D.1D BPDUs.actualtests.1d BPDU and eventually the two switches run 802.1d understands RSTP BPDUs because they are the same version.1d to communicate. 802.1d BPDU. However. it restarts the timer and starts using RSTP BPDUs on that port.1d BPDU.1d BPDU.cisco. 802.1d BPDU and eventually the two switches run 802. the migrate-delay timer is started (specifies the minimum time during which RSTP BPDUs are sent).1d BPDU? A.1d BPDU and eventually the two switches run 802. D. Answer: A Explanation: For backward compatibility with 802. but when a RSTP switch receives a 802.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/spantree. 2 C.Cisco 300-115 Exam 802. the switch processes all BPDUs received on that port and ignores the protocol type. it assumes that it is connected to an 802. but when a RSTP switch receives a 802. Reference: http://www.com 70 . and RSTP BPDUs are sent. if the RSTP switch is using 802.1d BPDU.html QUESTION NO: 88 When two MST instances (MST 1 and MST 2) are created on a switch.1D BPDUs on a port and receives an RSTP BPDU after the timer has expired. 802.1D switch and starts using only 802. B.

• The CST interconnects the MST regions and single spanning trees. known as the IST. in which all the spanning tree instances are independent. the number of BPDUs that need to be processed to support multiple spanning tree instances is 68sernamcantly reduced. which are 68sername6868eed within MST BPDUs.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/spantree. MST instance 1 in region A is independent of MST instance 1 in region B.actualtests. and so forth. but each MST instance has its own topology parameters. Reference: http://www. An MST instance is local to the region. and CST spanning trees: • An IST is the spanning tree that runs in an MST region. for a total of 3 instances. By default. all VLANs are assigned to the IST. even if regions A and B are interconnected. such as root bridge ID. Within each MST region. All MST instances within the same region share the same protocol timers. Instance 0 is a special instance for a region." . • A CIST is a collection of the ISTs in each MST region. "Pass Any Exam. for example. MST maintains multiple spanning tree instances. and the special 0 instance.cisco. there will be the 2 defined MST instances. All other MST instances are numbered from 1 to 4094. CIST. MST establishes and maintains IST. Any Time.com 71 .html QUESTION NO: 89 Refer to the exhibit. In the case for this question. root path cost. Because the MST BPDU carries information for all instances. The IST is the only spanning tree instance that sends and receives BPDUs.Cisco 300-115 Exam Explanation: Unlike other spanning tree protocols. All of the other spanning tree instance information is contained in MSTP records (M-records).www.

www. configurable in increments of 16. Modify the spanning-tree port-priority on SW1 f1/1 to 0 and f1/0 to 16.Cisco 300-115 Exam f1/0 and f1/1 have the same end-to-end path cost to the designated bridge. The possible priority range is 0 through 240 (default 128). Modify the spanning-tree port-priority on SW1 f1/1 to 16 and f1/0 to 0. C.com 72 .actualtests. Answer: C Explanation: If a loop occurs. You can assign higher priority values to LAN ports that you want STP to select first and lower priority values to LAN ports that you want STP to select last. If all LAN ports have the same priority value. Which action is needed to modify the Layer 2 spanning-tree network so that traffic for PC1 VLAN from switch SW3 uses switchport f1/1 as a primary port? A." . Modify the spanning-tree port-priority on SW2 f1/1 to 16 and f1/0 to 0. D. STP puts the LAN port with the lowest LAN port number in the forwarding state and blocks other LAN ports. Modify the spanning-tree port-priority on SW2 f1/1 to 0 and f1/0 to 16. B. "Pass Any Exam. Any Time. A lower path cost represents higher-speed transmission and is preferred. STP considers port priority when selecting a LAN port to put into the forwarding state.

it has the lowest priority value for VLAN 1. "Pass Any Exam.Cisco 300-115 Exam Reference: http://www.www. C.com/en/US/docs/switches/lan/catalyst2950/software/release/12.1_9_ea1/configur ation/guide/swstp. The switch priority value is zero.19 and all ports are forwarding. D.actualtests. Why would the switch be considered as a root bridge? A. The bridge priority is 1 and all ports are forwarding." .com 73 . B.html#wp1105354 QUESTION NO: 90 Refer to the exhibit.cisco. The switch priority for VLAN 1 and the macro specifies “This Bridge is the root”. The bridge priority is 128. Any Time.

actualtests. The lower the number. Reference: http://www.Cisco 300-115 Exam Answer: D Explanation: For priority.cisco." . Considering the default cost of upstream bridges to the root bridge is equal. 71sername71e f0/21 "Pass Any Exam. All ports are members of VLAN 10.com 74 . interface f0/14 C.html#wp1020666 QUESTION NO: 91 Refer to the exhibit.com/en/US/docs/switches/lan/catalyst2950/software/release/12.1_9_ea1/configur ation/guide/swstp. interface f0/13 B. which option will be the new root port for VLAN 10? A. the default is 32768. the more likely the switch will be chosen as the root switch. Any Time. the range is 0 to 61440 in increments of 4096.www. interface f0/15 D.

bypassing the listening and learning states. Which Layer 2 enhancement can be used to eliminate this delay? A.com 75 . Configure port to duplex full and speed 1000. D. it takes 30 to 60 seconds for the PC to see any activity on the network interface card. 1.extremenetworks. which represents the best path to the Root Bridge.Blocking – A port that would cause a switching loop. this process could take from 30-60 seconds. so it will be th– root port.Listening – The switch processes BPDUs and awaits possible new information that would cause it to return to the blocking state.actualtests. BPDU data is still received in blocking state. Configure port duplex and speed to auto negotiation. fa0/21 has t–e lowest cost. STP still monitors incoming BPDUs that would indicate it should return to the blocking state to prevent a loop.com/extreme/topics/802_1d_spanning_tree_election_rules QUESTION NO: 92 A network engineer is trying to deploy a PC on a network.www. In this case. STP PortFast causes a Layer 2 LAN interface configured as an access port to enter the forwarding state immediately." . 3. 2. Configure spanning-tree portfast. each port goes through 4 states to ensure that there are no physical loops in the layer 2 broadcast domain. C. Answer: C Explanation: When first powered on.Cisco 300-115 Exam Answer: D Explanation: Root Port election on each bridge Each (non-Root) bridge has exactly one Root Port. The engineer observes that when the PC is connected to the network. B. These steps are outlined as follows.Learning – While the port does not yet forward frames (packets) it does learn source addresses from frames received and adds them to the filtering database (switching database) 4. Configure no switchport. Any Time. no user data is sent or received but it may go into forwarding mode if the other links in use were to fail and the spanning tree algorithm determines the port may transition to the forwarding state. With the initial version of spanning tree. "Pass Any Exam. normal operation. Reference: https://community.Forwarding – A port receiving and sending data.

If an interface is enabled for portfast receives BDPU. and forwarding states.cmed. "Pass Any Exam. The port goes into root-inconsistent state and stops forwarding traffic. The port goes into BPDU-inconsistent state and stops forwarding traffic. However. and forwarding states should be used. D. C. the “Spanning-tree portfast bpdufilter default” command specifies that if a BPDU is received on that port. B.actualtests. If an interface is enabled for portfast receives BDPU. bypassing the listening and learning states. The port goes into errdisabled state and stops forwarding traffic.com 76 . The port goes into loop-inconsistent state and stops forwarding traffic. Switchone(config) # Spanning-tree portfast bpdufilter default Which statement about the spanning-tree portfast feature on the switch is true? A.www. learning. learning.us/Home/ethernet-and-ip/spanning-tree-protocol QUESTION NO: 93 A network engineer configured an Ethernet switch using these commands. learning. the port goes through the spanning-tree listening. If an interface is enabled for portfast receives BDPU. and forwarding states. Answer: A Explanation: STP PortFast causes a Layer 2 LAN interface configured as an access port to enter the forwarding state immediately. then the default action of STP of listening. QUESTION NO: 94 Which statement describes what happens when a port configured with root guard receives a superior BPDU? A. D. If an interface is enabled for portfast receives BDPU. the port does not go through the spanning-tree listening." . Any Time. C. B.Cisco 300-115 Exam Reference: http://net. the port is shut down immediately. the port goes into the spanning-tree inconsistent state.

com 77 . Any Time.shtml QUESTION NO: 95 Which statement about restrictions for multichassis LACP is true? A. In this way.actualtests. It does not support 1Gb links.cisco. No traffic is forIarded across this port.2SX/configuration/guide/mlacp _server_support. Reference: http://www. It is available only on a Cisco Catalyst 6500 Series chassis. This rootinconsistent state is effectively equal to a listening state. Answer: C Explanation: When configuring mLACP for Server Access. It is not available in VSS. follow these guidelines and restrictions: •PFC3A mode does not support the mLACP for server access feature. •VSS mode does not support the mLACP for server access feature. •No more than 100 VLANs can be active on a switch configured as a PoA.com/en/US/docs/switches/lan/catalyst6500/ios/12. unless two or more ports of the root bridge are connected together. B. •Converting a port channel to mLACP can cause a service disruption. root guard moves this port to a root-inconsistent STP state. Converting a port channel to mLACP can cause a service disruption.Cisco 300-115 Exam Answer: D Explanation: The root guard ensures that the port on which root guard is enabled is the designated port. C. Reference: http://www.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800ae96b. D. •mLACP does not support multiple neighbors. root bridge ports are all designated ports.www." . Normally. •mLACP does not support half-duplex links.html "Pass Any Exam.cisco. the root guard enforces the position of the root bridge. If the bridge receives superior STP Bridge Protocol Data Units (BPDUs) on a root guard-enabled port. •The DHD system priority must be lower (higher numerically) than the PoA system priority.

and only the new active virtual switch continues to forward traffic. Any Time. C. D. 8 D." .cisco. 6 C. What happens if all VSL connections between the virtual switch members are lost? A. Both virtual switch members cease to forward traffic. B.html QUESTION NO: 97 Which statement describes what happens if all VSL connections between the virtual switch members are lost? A. The VSS transitions to the dual active recovery mode.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74b . If for some rare reason all "Pass Any Exam. 12 Answer: C Explanation: The VSS is made up of the following: • Virtual switch members: Cisco Catalyst 6500 Series Switches (up to two switches with initial release) deployed with the Virtual Switching Supervisor 720 10GE • Virtual switch link (VSL): 10 Gigabit Ethernet connections (up to eight using EtherChannel) between the virtual switch members. 4 B.www.com 78 . Answer: D Explanation: Q. VSLs can be configured with up to eight links between the two switches across any combination of line cards or supervisor ports to provide a high level of redundancy. and both virtual switch members continue to forward traffic independently.Cisco 300-115 Exam QUESTION NO: 96 What is the maximum number of 10 Gigabit Ethernet connections that can be utilized in an EtherChannel for the virtual switch link? A.actualtests. The VSS transitions to the dual active recovery mode. Reference: http://www. The virtual switch members reload.

Reference: http://www. all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member. Any Time. Reference: http://www.www. Answer: B Explanation: In the dual active recovery mode. The new active virtual switch continues to forward traffic on all links.html QUESTION NO: 98 Which statement describes what happens when a switch enters dual active recovery mode? A.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74b . all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74b . All interfaces are shut down in the formerly active virtual switch member. C. The switch continues to forward traffic out all links and enables spanning tree on VSL link and all other links to prevent loops. the VSS will transition to the dual active recovery mode.cisco. but the new active virtual switch forwards traffic on all links.Cisco 300-115 Exam VSL connections are lost between the virtual switch members leaving both the virtual switch members up." .cisco. The new active virtual switch continues to forward traffic on all links.html "Pass Any Exam.com 79 . The dual active state is detected rapidly (subsecond) by any of the following three methods: • Enhancement to PagP used in MEC with connecting Cisco switches • L3 Bidirectional Forwarding Detection (BFD) configuration on a directly connected link (besides VSL) between virtual switch members or through an L2 link through an access layer switch • L2 Fast-Hello Dual-Active Detection configuration on a directly connected link (besides VSL) between virtual switch members (supported with 12. The switch shuts down and waits for the VSL link to be restored before sending traffic. The VSS detects which system was last in active state and shuts down the other switch.actualtests.2(33)SXI) In the dual active recovery mode. D. B.

Configuration Requirements for SwitchB • Vlan 21 ." . SwitchA is currently configured correctly. You have been tasked with competing the needed configuring of SwitchA and SwitchB.com 80 . 13.11/24 "Pass Any Exam. 21. • SwitchA needs to be the root switch for vlans 11. 12. but will need to be modified to support the addition of SwitchB.will support two servers attached to fa0/9 and fa0/10 • Vlan 22 . All other vlans should be left are their default values. SwitchA and SwitchB use Cisco as the enable password.will support two servers attached to fa0/15 and fa0/16 • Access ports that connect to server should transition immediately to forwarding state upon detecting the connection of a device. • SwitchB must operate in the same spanning tree mode as SwitchA • No routing is to be configured on SwitchB • Only the SVI vlan 1 is to be configured and it is to use address 192.actualtests.Name: Sales .www. 22 and 23.Cisco 300-115 Exam QUESTION NO: 99 CORRECT TEXT Scenario: You work for SWITCH.168. They have just added a new switch (SwitchB) to the existing network as shown in the topology diagram. Configuration Requirements for SwitchA The VTP and STP configuration modes on SwitchA should not be modified. SwitchB has a minimal configuration.1. • SwitchB VTP mode needs to be the same as SwitchA.com. RouterA is currently configured correctly and is providing the routing function for devices on SwitchA and SwitchB.will support two servers attached to fa0/13 and fa0/14 • Vlan 23 o Name: Engineering . Any Time.Name: Marketing .

21-23 channel-protocol lacp channel-group 1 mode passive switchport mode trunk ! "Pass Any Exam. 22 and 23 should tagged when traversing the trunk link. with SwitchA controlling activation.Cisco 300-115 Exam Inter-switch Connectivity Configuration Requirements • For operational and security reasons trunking should be unconditional and Vlans 1. • The two trunks between SwitchA and SwitchB need to be configured in a mode that allows for the maximum use of their bandwidth for all vlans. 21." .com 81 . Any Time.www. • Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link. This mode should be done with a nonproprietary protocol.actualtests. Answer: Here are steps: hostname SWITCH_B ! ! vlan 21 name Marketing vlan 22 name Sales vlan 23 name Engineering ! ! interface FastEthernet0/3 switchport trunk allowed vlan 1.

Any Time.actualtests.Cisco 300-115 Exam interface FastEthernet0/4 switchport trunk allowed vlan 1.www.com 82 ." .21-23 channel-protocol lacp channel-group 1 mode passive switchport mode trunk ! interface FastEthernet0/9 switchport access vlan 21 switchport mode access spanning-tree portfast ! interface FastEthernet0/10 switchport access vlan 21 switchport mode access spanning-tree portfast ! interface FastEthernet0/13 switchport access vlan 22 switchport mode access spanning-tree portfast ! ! interface FastEthernet0/14 switchport access vlan 22 switchport mode access spanning-tree portfast ! interface FastEthernet0/15 switchport access vlan 23 switchport mode access spanning-tree portfast ! interface FastEthernet0/16 switchport access vlan 23 switchport mode access spanning-tree portfast ! ! interface GigabitEthernet1/1 ! interface GigabitEthernet1/2 "Pass Any Exam.

com 83 .1. Any Time.21-23 channel-protocol lacp channel-group 1 mode active switchport mode trunk ! interface FastEthernet0/4 switchport trunk allowed vlan 1.168." .0 ! end SWITCH_B(config)# hostname SWITCH_A ! panning-tree vlan 11 root primary spanning-tree vlan 12 root primary spanning-tree vlan 13 root primary spanning-tree vlan 21 root primary spanning-tree vlan 22 root primary spanning-tree vlan 23 root primary ! interface FastEthernet0/3 switchport trunk allowed vlan 1.21-23 ! interface Vlan1 ip address 192.255.Cisco 300-115 Exam ! interface Port-channel 1 switchport mode trunk switchport trunk encapsulation dot1q spanning-tree allowed vlans 1.actualtests.11 255.www.255.21-23 channel-protocol lacp channel-group 1 mode active switchport mode trunk ! interface FastEthernet0/21 switchport access vlan 21 switchport mode access ! interface FastEthernet0/22 switchport access vlan 22 switchport mode access ! interface FastEthernet0/23 "Pass Any Exam.

168.10.32/27 – 190.10. Routed interfaces should use the lowest host on a subnet when possible.www.Cisco 300-115 Exam switchport access vlan 23 switchport mode access ! interface GigabitEthernet1/1 ! interface GigabitEthernet1/2 ! interface Port-channel 1 ! interface Vlan1 no ip address shutdown ! ip default-gateway 192. which has a partial configuration and has been attached to RouterC as shown in the topology diagram.actualtests.1. RouterC is correctly configured.64/27 "Pass Any Exam. You need to configure SwitchC so that Hosts H1 and H2 can successfully ping the server S1.1 ! ! End QUESTION NO: 100 CORRECT TEXT You have been tasked with configuring multilayer SwitchC. All routes must be learned via EIGRP 65010 routing protocol. No trunking has been configured on RouterC.com 84 . Any Time. Due to administrative restrictions and requirements you should not add/delete vlans or create trunk links. The following subnets are available to implement this solution: – 10.0/24 – 190.200." .250.250. Also SwitchC needs to be able to ping server S1.200. Company policies forbid the use of static or default routing. You do not have access to RouteC.

changes VLAN port assignments or create trunks.Cisco 300-115 Exam Hosts H1 and H2 are configured with the correct IP address and default gateway.www. "Pass Any Exam. SwitchC uses Cisco as the enable password. Routing must only be enabled for the specific subnets shown in the diagram. All routes must be learned via the EIGRP routing protocol." . Company policies forbid the use of static or default routing.com 85 .actualtests. Note: Due to administrative restrictions and requirements you should not add or delete VLANs. Any Time.

No trunking requires. + Only use SwitchC for interVLAN routing without using RouterC. Trunking must be established between RouterC and SwitchC.com 86 .Cisco 300-115 Exam Answer: There are two ways to configure interVLAN routing in this case: + Use RouterC as a “router on a stick” and SwitchC as a pure Layer2 switch.www. SwitchC should be configured as a Layer 3 switch (which supports ip routing function as a router).actualtests. The question clearly states “No trunking has been configured on RouterC” so RouterC does not contribute to interVLAN routing of hosts H1 & H2 -> SwitchC must be configured as a Layer 3 "Pass Any Exam." . Any Time.

so you will not miss within it in the exam. SwitchC(config-if)# no shutdown SwitchC(config-if)# exit SwitchC(config)# int vlan 2 SwitchC(config-if)# ip address 190.10. We should check the default gateways on H1 & H2.Cisco 300-115 Exam switch with SVIs for interVLAN routing.200.250.0. SwitchC# configure terminal SwitchC(config)# int gi0/1 SwitchC(config-if)#no switchport -> without using this command.200.255.33 Host2: + Default gateway: 190. in fact it is not necessary because the network 190. and from the PCs as well. Any Time.65 255.0 ->RouterC has used IP 10.10. Answer: \>ipconfig We will get the default gateways as follows: Host1: + Default gateway: 190.0. no neighbor "Pass Any Exam. you should expect the ping to SERVER to succeed from the MLS.10.0.255. Also make sure you use the correct EIGRP AS number (in the configuration above it is 650 but it will change when you take the exam) but we are not allowed to access RouterC so the only way to find out the EIGRP AS is to look at the exhibit above.255.200.250. If you use wrong AS number. In order to complete the lab.255." .www.0.224 SwitchC(config-if)# no shutdown SwitchC(config-if)#exit SwitchC(config)# ip routing (Notice: MLS will not work without this command) SwitchC(config)# router eigrp 65010 SwitchC(config-router)# network 10.33 255.200.200.31 SwitchC(config-router)# network 190.250.2 255.255.actualtests.224 SwitchC(config-if)# no shutdown SwitchC(config-if)# int vlan 3 SwitchC(config-if)# ip address 190.10. SwitchC(config-if)# ip address 10.0. the simulator does not let you assign IP address on Gi0/1 interface.255 SwitchC(config-router)# network 190.250.0.0/16 is not used anywhere else in this topology. Click on H1 and H2 and type the “ipconfig” command to get their default gateways.250.255.10.0 0.10.com 87 . also don’t modify/delete any port just do the above configuration.31 NOTE: THE ROUTER IS CORRECTLY CONFIGURED. gi0/11 interfaces were configured as access ports so we don’t need to configure them in this sim.32 0.65 Now we have enough information to configure SwitchC (notice the EIGRP AS in this case is 650) Note: VLAN2 and VLAN3 were created and gi0/10.200.250.64 0.200. Also some reports said the “no auto-summary” command can’t be used in the simulator.1 so this is the lowest usable IP address.0.

" .0. In fact.0. Any Time.200.250. Use the console access to the existing and new switches to configure and verify correct device configuration. QUESTION NO: 101 You have been asked to install and configure a new switch in a customer network.Cisco 300-115 Exam relationship is formed between RouterC and SwitchC.com 88 . "Pass Any Exam.200.64 0. just for sure.250.0.31 and “network 190.www. But in the exam the sim is just a flash based simulator so we should use two above commands. we can use “show run” command to verify. only the summarized network 190. we are pretty sure instead of using two commands “network 190.0 is shown.0. But after finishing the configuration.0.32 0.actualtests.200.0.31 we can use one simple command “network 190. even without “no auto-summary” command the network still works correctly.0 because it is the nature of distance vector routing protocol like EIGRP: only major networks need to be advertised.200.

com 89 .actualtests.Cisco 300-115 Exam "Pass Any Exam." . Any Time.www.

" . Any Time.Cisco 300-115 Exam You are connecting the New_Switch to the LAN topology.actualtests.www. the switch has been partially configured and you need to complete the rest of configuration to enable PC1 communication with PC2. Which of the configuration is correct? "Pass Any Exam.com 90 .

Any Time.www. Option D E.com 91 . Option B C.Cisco 300-115 Exam A. Option E "Pass Any Exam. Option A B. Option C D." .actualtests.

Use the console access to the existing and new switches to configure and verify correct device configuration.www. 2. Note that the VTP versions supported in this network are 1. So. Logging in to SW1 and using the “show vtp status” command we see this: So we know that the VTP domain must be CCNP. step one is to find the correct VTP name on the other switches. "Pass Any Exam. Any Time.Cisco 300-115 Exam Answer: D Explanation: Within any VTP.actualtests." . This leaves only choice D and E. 3 so either VTP version 2 or 3 can be configured on the new switch. so we know that this port must be an access port in VLAN 100. We also see from the topology diagram that eth 0/0 of the new switch connects to a PC in VLNA 100. QUESTION NO: 102 You have been asked to install and configure a new switch in a customer network.com 92 . leaving only choice D as correct. the VTP domain name must match.

Cisco 300-115 Exam "Pass Any Exam.com 93 . Any Time.www." .actualtests.

actualtests." .www.com 94 . Any Time.Cisco 300-115 Exam "Pass Any Exam.

VLAN 999 D.actualtests.com 95 .www. VLAN 300 Answer: B Explanation: The native VLAN is used for untagged frames sent along a trunk." . Any Time. VLAN 50 F.Cisco 300-115 Exam Refer to the configuration. VLAN 40 E. VLAN 200 G. By issuing the “show interface trunk” command on SW1 and SW2 we see the native VLAN is 99. For which configured VLAN are untagged frames sent over trunk between SW1 and SW2? A. VLAN 99 C. "Pass Any Exam. VLAN1 B.

www.Cisco 300-115 Exam QUESTION NO: 103 You have been asked to install and configure a new switch in a customer network." .com 96 . Use the console access to the existing and new switches to configure and verify correct device configuration. Any Time.actualtests. "Pass Any Exam.

Cisco 300-115 Exam "Pass Any Exam." .actualtests. Any Time.www.com 97 .

Configure VLAN 500 & VLAN 600 on both SW1 & SW2 B." .www.actualtests.SW2 and SW4 "Pass Any Exam.Cisco 300-115 Exam You are adding new VLANs. Which configuration step is valid? A. VLAN500 and VLAN600 to the topology in such way that you need to configure SW1 as primary root for VLAN 500 and secondary for VLAN 600 and SW2 as primary root for VLAN 600 and secondary for VLAN 500. Configure VLAN 500 and VLAN 600 on SW2 only D. Configure VLAN 500 and VLAN 600 on SW1 . Any Time. Configure VLAN 500 and VLAN 600 on SW1 only C.com 98 .

SW2.Cisco 300-115 Exam E.actualtests. "Pass Any Exam. and SW4 we see that both SW1 and SW2 are operating in VTP server mode. configure vtp mode as off and configure VLAN 500 and VLAN 600.www. Answer: A Explanation: By issuing the “show vtp status command on SW2. On SW2. Any Time." . configure back to vtp server mode. so we will need to add both VLANs to SW1 and SW2.com 99 . but SW4 is a client.

www.Cisco 300-115 Exam QUESTION NO: 104 You have been asked to install and configure a new switch in a customer network. Use the console access to the existing and new switches to configure and verify correct device configuration.com 100 .actualtests. "Pass Any Exam. Any Time." .

Cisco 300-115 Exam "Pass Any Exam." . Any Time.www.com 101 .actualtests.

actualtests.Cisco 300-115 Exam "Pass Any Exam. Any Time.www." .com 102 .

Cisco 300-115 Exam Examine the VTP configuration. you will need to only disable pruning on the switch that contains the private VLANs. Topic 2. In this case.www. only SW4 will connect to servers in a private VLAN.com 103 . Answer: C Explanation: To create private VLANs. Disable VTP pruning on SW1 only B. Disable VTP pruning on SW2 only C.actualtests. Any Time. Disable VTP pruning on SW2. Which of the following configuration steps will allow creating private VLANs? A. Infrastructure Security QUESTION NO: 105 A Cisco Catalyst switch that is prone to reboots continues to rebuild the DHCP snooping "Pass Any Exam." . SW4 and New_Switch E. You are required to configure private VLANs for a new server deployment connecting to the SW4 switch. Disable VTP pruning on SW4 only D. Disable VTP pruning on New_Switch and SW4 only.

Reference: http://www. 3. Answer: A Explanation: Minimum DHCP Snooping Configuration The minimum configuration steps for the DHCP snooping feature are as follows: 1. authentication C. accounting D. What is the solution to avoid the snooping database from being rebuilt after every device reboot? A.2SX/configuration/guide/snood hcp. 5. DHCP snooping is inactive on all VLANs. Ensure that DHCP server is connected through a trusted interface. By default. The feature is not active until you complete this step. This step ensures that database entries are restored after a restart or switchover. Any Time.html#wp1090479 QUESTION NO: 106 Which portion of AAA looks at what a user has access to? A. Define and configure the DHCP server. Enable DHCP snooping for all VLANs that are associated with the switch. A DHCP snooping database agent should be configured.www.cisco.Cisco 300-115 Exam database." . By default.com 104 . auditing Answer: A Explanation: "Pass Any Exam. Enable DHCP snooping globally. authorization B. the trust state of all interfaces is untrusted.actualtests. E. Configure the DHCP snooping database agent. D. C. 4. Enable DHCP snooping on at least one VLAN.com/en/US/docs/switches/lan/catalyst6500/ios/12. 2. Disable Option 82 for DHCP data insertion. Use IP Source Guard to protect the DHCP binding table entries from being lost upon rebooting. Apply ip dhcp snooping trust on all interfaces with dynamic addresses. B.

(config)# aaa authentication login default radius local B. (config)# aaa authentication login radius local Answer: B Explanation: In the command “aaa authentication login login radius local” the second login is the name of the AAA method. Which solution ensures that the server maintains network reachability in the future? A. It also lists radius first then local. D. B.com 105 . C.techrepublic. QUESTION NO: 108 A server with a statically assigned IP address is attached to a switch that is provisioned for DHCP snooping. the network team is considering enabling dynamic ARP inspection alongside DHCP snooping. Trust the interface that is connected to the server with the ip dhcp snooping trust command.www. Verify the source MAC address of all untrusted interfaces with ip dhcp snooping verify macaddress command." . Any Time. Disable DHCP snooping information option. (config)# aaa authentication login login radius local C. so it will primarily use RADIUS for authentication and fail over to the local user database only if the RADIUS server is unreachable.Cisco 300-115 Exam AAA consists of the following three elements: Reference: http://www. For more protection against malicious attacks.com/blog/data-center/what-is-aaa-and-how-do-you-configureit-in-the-cisco-ios/ QUESTION NO: 107 Which command creates a login authentication method named “login” that will primarily use RADIUS and fail over to the local user database? A. (config)# aaa authentication login default local radius D. Configure a static DHCP snooping binding entry on the switch.actualtests. Answer: B Explanation: "Pass Any Exam.

com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/122_55_se/configuration/guide/scg3750/swdynarp. Dynamic ARP inspection ensures that only valid ARP requests and responses are relayed. Any Time. If the ARP packet is received on a trusted interface. The switch performs these activities: •Intercepts all ARP requests and responses on untrusted ports •Verifies that each of these intercepted packets has a valid IP-to-MAC address binding before updating the local ARP cache or before forwarding the packet to the appropriate destination.cisco. Reference: http://www." . Disable VTP and manually assign VLANs. Configure VTP Transparent Mode.html QUESTION NO: 109 A network engineer wants to ensure Layer 2 isolation of customer traffic using a private VLAN.Cisco 300-115 Exam Dynamic ARP inspection is a security feature that validates ARP packets in a network. the DHCP snooping binding database. This database is built by DHCP snooping if DHCP snooping is enabled on the VLANs and on the switch. Reference: http://www. Private VLANs are configured in the context of a single switch and cannot have members on other switches. the switch forwards the packet without any checks. Enable VTP version 3. Answer: C Explanation: You must configure VTP to transparent mode before you can create a private VLAN. Ensure all switches are configured as VTP server mode. C. logs. D.actualtests. On untrusted interfaces.www.com 106 . the switch forwards the packet only if it is valid.ciscopress. This capability protects the network from certain man-in-the-middle attacks. Private VLANs also carry TLVs that are not known to all types of Cisco switches. Which configuration must be made before the private VLAN is configured? A. configure a static DHCP snooping binding entry on the switch.com/articles/article. B.asp?p=29803&seqNum=6 "Pass Any Exam. and discards ARP packets with invalid IP-to-MAC address bindings. •Drops invalid ARP packets Dynamic ARP inspection determines the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a trusted database. To ensure network reachability to the server. It intercepts.

Which option is the cause of this issue? A. the packets are assumed to be spoofed and will be discarded.cisco. The interface that is connected to the workstation in question will be put into the errdisabled state. The DHCP server does not support information option 82. IP Source Guard with the ip verify source port-security command is configured under the interfaces that connect to all DHCP clients on the switch. The DHCP client interfaces have storm control configured.html#ipsourceguard QUESTION NO: 111 A DHCP configured router is connected directly to a switch that has been provisioned with DHCP snooping. or with source IP and MAC address filtering. clients are not receiving an IP address via the DHCP server.com 107 . An entry in this table has an IP address. Packets from the workstation will be rate limited according to the default values set on the switch. The switch forwards IP traffic when the source IP address matches an entry in the DHCP snooping binding database or a binding in the IP source binding table. Which statement describes the outcome of this scenario? A. The packets originating from the workstation are assumed to be spoofed and will be discarded. Answer: D Explanation: The IP source binding table has bindings that are learned by DHCP snooping or are manually configured (static IP source bindings). B. Traffic will pass accordingly after the new IP address is populated into the binding database. IP traffic is filtered based on the source IP and MAC addresses. If there is no match. its associated MAC address.www. C. When IP source guard is enabled with this option.com/c/en/us/support/docs/switches/catalyst-3750-seriesswitches/72846-layer2-secftrs-catl3fixed. D. and its associated VLAN number. B. Reference: http://www. Any Time. The switch uses the IP source binding table only wIen IP source guard is enabled. The switch forwards traffic only when the source IP and MAC addresses match an entry in the IP source binding table. IP traffic is filtered based on the source IP address. However.Cisco 300-115 Exam QUESTION NO: 110 DHCP snooping and IP Source Guard have been configured on a switch that connects to several client workstations." . When IP source guard is enabled with this option. You can configure IP source guard with source IP address filtering.actualtests. The IP address of one of the workstations does not match any entries found in the DHCP binding database. "Pass Any Exam.

Answer: A Explanation: When you enable both IP Source Guard and Port Security. You can enable IP source guard when DHCP snooping is enabled on an untrusted interface. C. The interfaces are configured as Layer 3 using the no switchport command.Cisco 300-115 Exam C. the switch blocks all IP traffic received on the "Pass Any Exam. DHCP snooping must be enabled on all VLANs. Any Time.actualtests. The switch is configured for sdm prefer routing as the switched database management template. A network engineer is configuring the switch for DHCP snooping and IP Source Guard.cisco. using the ip verify source port-security interface configuration command." .www.html#wp1069615 QUESTION NO: 112 A switch is added into the production network to increase port capacity. Reference: http://www. The configured SVIs on the switch have been removed for the associated interfaces. The MAC address of the DHCP client is learned as a secure address only when the switch receives non-DHCP data traffic. E. Which option is the cause of the problem? A. there are two caveats: •The DHCP server must support option 82. D. D. Answer: B Explanation: IP source guard is a security feature that restricts IP traffic on nonrouted. No VLANs exist on the switch and/or the switch is configured in VTP transparent mode. B.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/122_25_see/configuration/guide/3550SCG/swdhcp82. The local DHCP server is disabled prior to enabling IP Source Guard. •The MAC address in the DHCP packet is not learned as a secure address. You can use IP source guard to prevent traffic attacks caused when a host tries to use the IP address of its neighbor. even if they are not utilized for dynamic address allocation. Static DHCP bindings are not configured on the switch. After IP source guard is enabled on an interface. Layer 2 interfaces by filtering traffic based on the DHCP snooping binding database and on manually configured IP source bindings. or the client is not assigned an IP address.com 108 . but is unable to configure ip verify source under several of the interfaces.

storm control is disabled. C. In which three ways does this command impact the traffic? (Choose three. The switch uses the IP source binding table only when IP source guard is enabled. A port access control list (ACL) is applied to the interface. except for DHCP packets allowed by DHCP snooping. You can configure IP source guard with source IP address filtering or with source IP and MAC address filtering. Multicast traffic is dropped at 65% and broadcast traffic is dropped at 75% of the total interface bandwidth.www.00. specify the rising threshold level for broadcast. IP source guard is supported only on Layer 2 ports. The switch drops broadcasts when they reach 75% of bandwidth.com 109 . An entry in this table has an IP address. By default.actualtests. SNMP traps are sent by default when broadcast traffic reaches 65% of the lower-level threshold. The range is 0. The switchport is disabled when unicast traffic reaches 75% of the total interface bandwidth. its associated MAC address. • "Pass Any Exam. The port blocks traffic when the rising threshold is reached.Cisco 300-115 Exam interface. Answer: C.00 to 100. D." . or unicast storm control. The switch resumes forwarding broadcasts when they are below 65% of bandwidth. F. B.D.) A. E. Only broadcast traffic is limited by this particular storm control configuration. Any Time. The keywords have these meanings: • For level.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/122_25_see/configuration/guide/3550SCG/swdhcp82.F Explanation: storm-control {broadcast | multicast | unicast} level {level [level-low] | pps pps [pps-low]} Configure broadcast.cisco. including access and trunk ports. The IP source binding table has bindings that are learned by DHCP snooping or are manually configured (static IP source bindings). The port ACL allows only IP traffic with a source IP address in the IP source binding table and denies all other traffic. or unicast traffic as a percentage (up to two decimal places) of the bandwidth. multicast. Reference: http://www. multicast.html#wp1069615 QUESTION NO: 113 The command storm-control broadcast level 75 65 is configured under the switch port connected to the corporate mail server. and its associated VLAN number.

cisco. In this case. If a port is in per-VLAN errdisable mode.html QUESTION NO: 114 After port security is deployed throughout an enterprise campus. specify the falling threshold level as a percentage (up to two decimal places) of the bandwidth. you can also use clear errdisable interface name vlan range command to re-enable the VLAN on the port. Reference: http://www.com 110 . This value must be less than or equal to the rising suppression value. If you do not configure a falling suppression level. switch(config)# errdisable recovery interval 180 B. The range is 0. The port forwards traffic when traffic drops below this level. Which command accomplishes this task? A.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/122_25_see/configuration/guide/3550SCG/swtrafc. the network team has been overwhelmed with port reset requests. Reference: http://www.cisco. you can bring it out of this state automatically by configuring the errdisable recovery cause psecure-violation global configuration command or you can manually reenable it by entering the shutdown and no shut down interface configuration commands.www. Any Time.actualtests.00. switch(config)# errdisable recovery cause psecure-violation C." . it is set to the rising suppression level.com/c/en/us/td/docs/switches/lan/catalyst4500/122/53SG/configuration/config/port_sec. switch(config)# switchport port-security protect D. switch(config)# errdisable recovery cause security-violation Answer: B Explanation: When a secure port is in the error-disabled state.Cisco 300-115 Exam (Optional) For level-low. the broadcast keyword was used so only broadcast traffic is limited. This is the default mode. They decide to configure the network to automate the process of re-enabling user ports. You can also customize the time to recover from the specified error disable cause (default is 300 seconds) by entering the errdisable recovery interval interval command.00 to 100. switch(config)# switchport port-security aging type inactivity E.pdf QUESTION NO: 115 "Pass Any Exam.

E Explanation: These two commands will show the MAC address table. Which two commands help trace this PC when the MAC address is known? (Choose two. storm control B. Dynamic ARP Inspection "Pass Any Exam. switch# show ip arp inspection E.e289 Dynamic 1 FastEthernet0/1 0010.) A.Cisco 300-115 Exam The network monitoring application alerts a network engineer of a client PC that is acting as a rogue DHCP server. switch# show ip verify source D.7b00.com 111 .-------------------0010. Cisco IOS parser D.-----------.0de0. Any Time.actualtests. Here is an example output: Switch> show mac-address-table Dynamic Addresses Count: 9 Secure Addresses (User-defined) Count: 0 Static Addresses (User-defined) Count: 0 System Self Addresses Count: 41 Total MAC addresses: 50 Non-static Address Table: Destination Address Address Type VLAN Destination Port ------------------.www. a network engineer discovered an unusually high level of broadcast traffic coming from one of the switch interfaces.1545 Dynamic 2 FastEthernet0/5 QUESTION NO: 116 While troubleshooting a network outage." . SDM routing C. Which option decreases consumption of bandwidth used by broadcast traffic? A. including the switch port that the particular host is using. switch# show mac address-table B. switch# show mac address-table address <mac address> Answer: A.---.1540 Dynamic 2 FastEthernet0/5 0010. switch# show port-security C. integrated routing and bridging E.7b00.

cisco. or unicast storm on a port.html QUESTION NO: 117 Which command globally enables AAA on a device? A. Errors in the protocol-stack implementation. or users issuing a denial-of-service attack can cause a storm. Any Time. aaa accounting Answer: A Explanation: To configure AAA authentication.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathen. or multicast packets. aaa authorization D. mistakes in network configuration. and ARAP connections? "Pass Any Exam. aaa new-model B. multicast. Storm control uses rising and falling thresholds to block and then restore the forwarding of broadcast.www. aaa authentication C. SLIP. creating excessive traffic and degrading network performance. You can also set the switch to shut down the port when the rising threshold is reached. A LAN storm occurs when packets flood the LAN. AAA features are not available for use until you enable AAA globally by issuing the aaa new-model command. Reference: http://www. Reference: http://www.cisco. unicast.com/c/en/us/td/docs/switches/lan/catalyst2950/software/release/121_22ea/SCG/scg/swtrafc." .html QUESTION NO: 118 Which AAA Authorization type includes PPP. By default.actualtests.com 112 . Storm control is configured for the switch as a whole but operates on a per-port basis. enable AAA by using the aaa new-model global configuration command. storm control is disabled.Cisco 300-115 Exam Answer: A Explanation: Storm control prevents traffic on a LAN from being disrupted by a broadcast.

This process continues until there is successful communication with a listed authorization method. Reference: http://www. in sequence. SLIP. Method lists enable you to designate one or more security protocols to be used for authorization. associated with a specific privilege level. IP mobile C. TACACS+ "Pass Any Exam. Method lists are specific to the authorization type requested: •Auth-proxy—Applies specific security policies on a per-user basis. or ARAP connection. you are defining a particular list of authorization methods for the indicated authorization type.cisco.1x? A. Any Time. the Cisco IOS software selects the next method listed in the method list. EXEC D.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathor. auth-proxy Answer: A Explanation: Method lists for authorization define the ways that authorization will be performed and the sequence in which these methods will be performed.actualtests.com 113 . or all methods defined are exhausted. RADIUS with EAP Extension B. Command authorization attempts authorization for all EXEC mode commands. thus ensuring a backup system in case the initial method fails. This can include a PPP. network B. For detailed information on the authentication proxy feature. A method list is simply a named list describing the authorization methods to be queried (such as RADIUS or TACACS+). Cisco IOS software uses the first method listed to authorize users for specific network services.www. •Reverse Access—Applies to reverse Telnet sessions. When you create a named method list.html QUESTION NO: 119 Which authentication service is needed to configure 802. if that method fails to respond." . including global configuration commands. •Network—Applies to network connections. •EXEC—Applies to the attributes associated with a user EXEC terminal session. refer to the chapter "Configuring Authentication Proxy" in the "Traffic Filtering“and Firewalls" part of this book” •Comma“ds—Applies to the EXEC mode com”ands a user issues.Cisco 300-115 Exam A.

Any Time." . Which login credentials are required when connecting to the console port in this output? A. the authentication service is transparent to the client.com 114 . RADIUS using VSA Answer: A Explanation: With 802. RADIUS with CoA D. no username with password linepass D.www.pdf QUESTION NO: 120 Refer to the exhibit. The authentication server validates the identity of the client and notifies the switch whether or not the client is authorized to access the LAN and switch services. Because the switch acts as the proxy. login authentication default "Pass Any Exam. the authentication server—performs the actual authentication of the client.cisco. The Remote Authentication Dial-In User Service (RADIUS) security system with Extensible Authentication Protocol (EAP) extensions is the only supported authentication server.Cisco 300-115 Exam C. none required B.actualtests. Reference: http://www. 115sernamee cisco with password cisco C.1x.com/c/en/us/td/docs/switches/lan/catalyst2940/software/release/121_19_ea1/configuration/guide/2940scg_1/sw8021x.

Line password. local username C. local username Answer: A Explanation: sessions use the vty lines. which lists none as the authentication method.www. line password B.com 115 . Any Time. RADIUS server. RADIUS server D. line password. local username." . RADIUS server. Line password. where the configured authentication method is named “default.” The AAA default login preference is stated in order from first to last. RADIUS server. so here the “aaa authentication login default group radius local line” means to use RADIUS first.Cisco 300-115 Exam Answer: A Explanation: Here the console has been configured with the NO_AUTH name. None means no authentication. QUESTION NO: 121 Refer to the exhibit. in which order does the device check the login credentials? A.actualtests. When a network administrator is attempting an SSH connection to the device. meaning that credentials are not required and all sessions are allowed access immediately. then if that fails use the local user "Pass Any Exam. local username.

Cisco 300-115 Exam database. • Utilizes the DHCP snooping binding database to validate subsequent requests from untrusted hosts. trusted hosts with available IP addresses Answer: A Explanation: DHCP snooping is a security feature that acts like a firewall between untrusted hosts and trusted DHCP servers. • Rate-limits DHCP traffic from trusted and untrusted sources. • Builds and maintains the DHCP snooping binding database. VTP pruning D. Finally. untrusted hosts with available IP addresses D. Reference: http://www. Any Time.actualtests.com 116 .pdf QUESTION NO: 123 Which switch feature determines validity based on IP-to-MAC address bindings that are stored in a trusted database? A. DHCP snooping Answer: A "Pass Any Exam.www. storm control C. if that fails use the line password. QUESTION NO: 122 Which type of information does the DHCP snooping binding database contain? A.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/snoodhcp. The DHCP snooping feature performs the following activities: • Validates DHCP messages received from untrusted sources and filters out invalid messages. which contains information about untrusted hosts with leased IP addresses. Dynamic ARP Inspection B.cisco. trusted hosts with leased IP addresses C. untrusted hosts with leased IP addresses B." .

make sure that the devices acting as the DHCP server and the DHCP relay agent are configured and enabled. Any Time.html "Pass Any Exam. This database is built by DHCP snooping if DHCP snooping is enabled on the VLANs and on the switch. On untrusted interfaces. •Before globally enabling DHCP snooping on the switch. the switch forwards the packet only if it is valid. configure the port as untrusted by entering the no ip dhcp snooping trust interface configuration command. Reference: http://www. •If a Layer 2 LAN port is connected to a DHCP client.cisco. the DHCP snooping binding database.com 117 . ip dhcp snooping information Answer: A Explanation: When configuring DHCP snooping.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/snoodhcp.Cisco 300-115 Exam Explanation: Dynamic ARP inspection determines the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a trusted database. and enable DHCP globally on the switch. the switch forwards the packet without any checks. ip dhcp snooping trust B. ip dhcp trust D. follow these guidelines: •DHCP snooping is not active until you enable the feature on at least one VLAN.cisco.actualtests. ip dhcp snooping C. Reference: http://www. If the ARP packet is received on a trusted interface. configure the port as trusted by entering the “ip dhcp snooping trust” interface configuration command.com/c/en/us/support/docs/switches/catalyst-3750-seriesswitches/72846-layer2-secftrs-catl3fixed.html QUESTION NO: 124 Which command is needed to enable DHCP snooping if a switchport is connected to a DHCP server? A.www." . •If a Layer 2 LAN port is connected to a DHCP server.

actualtests. Each port is completely isolated from all other ports in the isolated VLAN. including the community and isolated host ports? A. •Isolated—An isolated port is a host port that belongs to an isolated secondary VLAN." . or no secondary VLANs.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/C LIConfigurationGuide/PrivateVLANs.Cisco 300-115 Exam QUESTION NO: 125 Which private VLAN access port belongs to the primary VLAN and can communicate with all interfaces. The promiscuous port can communicate with all interfaces. isolated port C. •Community—A community port is a host port that belongs to a community secondary VLAN. community port D. Each promiscuous port can have several secondary VLANs. Any Time.com 118 . Traffic received from an isolated port is forwarded only to promiscuous ports. Private VLANs block all traffic to isolated ports except traffic from promiscuous ports. as long as the promiscuous port and secondary VLANs are within the same primary VLAN. This port has complete isolation from other ports within the same private VLAN domain.cisco. You can associate a secondary VLAN to more than one promiscuous port. Reference: http://www. Community ports communicate with other ports in the same community VLAN and with associated promiscuous ports. that belong to those secondary VLANs associated to the promiscuous port and associated with the primary VLAN. including the community and isolated host ports. associated to that port. These interfaces are isolated from all other interfaces in other communities and from all isolated ports within the private VLAN domain. promiscuous port B. You can have several promiscuous ports in a primary VLAN. except that it can communicate with associated promiscuous ports. trunk port Answer: A Explanation: The types of private VLAN ports are as follows: •Promiscuous—A promiscuous port belongs to the primary VLAN.html "Pass Any Exam. You can also have secondary VLANs that are not associated to any promiscuous port. You may want to do this for loadbalancing or redundancy purposes. You can have more than one isolated port in a specified isolated VLAN.www.

•Isolated VLAN —An isolated VLAN is a secondary VLAN that carries unidirectional traffic upstream from the hosts toward the promiscuous ports.actualtests.com 119 .com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/C LIConfigurationGuide/PrivateVLANs.html QUESTION NO: 127 Which database is used to determine the validity of an ARP packet based on a valid IP-to-MAC address binding? A." . but these ports cannot communicate with ports in any other community or isolated VLAN in the private VLAN. and the traffic from each isolated port also remains completely separate. Isolated. •Community VLAN—A community VLAN is a secondary VLAN that carries upstream traffic from the community ports to the promiscuous port and to other host ports in the same community.cisco. primary VLAN C. and to other promiscuous ports. The ports within one community can communicate. Each isolated VLAN can have several isolated ports. DHCP snooping database B.www. You can configure multiple community VLANs in a private VLAN domain. You can configure multiple isolated VLANs in a private VLAN domain. community VLAN D. promiscuous VLAN Answer: A Explanation: Understanding Primary. Any Time. isolated VLAN B. dynamic ARP database "Pass Any Exam. both isolated and community. Reference: http://www.Cisco 300-115 Exam QUESTION NO: 126 Which private VLAN can have only one VLAN and be a secondary VLAN that carries unidirectional traffic upstream from the hosts toward the promiscuous ports and the gateway? A. and Community Private VLANs Primary VLANs and the two types of secondary VLANs (isolated and community) have these characteristics: •Primary VLAN— The primary VLAN carries traffic from the promiscuous ports to the host ports. all the traffic remains isolated within each one.

static ARP database Answer: A Explanation: Information About Dynamic ARP Inspection DAI is used to validate ARP requests and responses as follows: • Intercepts all ARP requests and responses on untrusted ports.com 120 . This database is built by DHCP snooping when it is enabled on the VLANs and on the device. It may also contain static entries that you have created." . • When IP source guard with source IP filtering is enabled on an interface. DHCP snooping B. Reference: http://www.cisco.Cisco 300-115 Exam C. • Verifies that a packet has a valid IP-to-MAC address binding before updating the ARP cache or forwarding the packet. If you enter the ip source binding mac-address vlan vlan-id ip-address interface interface-id global configuration command on a routed interface.www. DHCP snooping "Pass Any Exam.html QUESTION NO: 128 When IP Source Guard with source IP filtering is enabled on an interface.com/c/en/us/td/docs/switches/datacenter/nexus1000/hyperv/sw/5_2_1_s_m_1_5 _2/troubleshooting/configuration/guide/n1000v_troubleshooting/n1000v_trouble_19dhcp. which feature must be enabled on the access VLAN for that interface? A. • Drops invalid ARP packets. this error message appears: Static IP source binding can only be configured on switch port. spanning-tree portfast D. dynamic routing database D.actualtests. storm control C. Any Time. private VLAN Answer: A Explanation: IP Source Guard Configuration Guidelines • You can configure static IP bindings only on nonrouted ports. DAI can determine the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a DHCP snooping binding database.

The traffic storm control feature prevents LAN ports from being disrupted by a broadcast. • You can enable this feature when 802.com/c/en/us/td/docs/routers/7600/ios/122SR/configuration/guide/swcg/dos. storm control B.cisco. Reference: http://3c3cc.actualtests. VTP pruning D.com/c/en/us/td/docs/switches/lan/catalyst2960x/software/150_2_EX/security/configuration_guide/b_sec_152ex_2960-x_cg/b_sec_152ex_2960x_cg_chapter_01110.html QUESTION NO: 129 Which switch feature prevents traffic on a LAN from being overwhelmed by continuous multicast or broadcast traffic? A.1x port-based authentication is enabled. router(config-if)#storm-control action trap "Pass Any Exam. port security C.com 121 .www.pdf QUESTION NO: 130 Which command would a network engineer apply to error-disable a switchport when a packetstorm is detected? A. Reference: http://www. router(config-if)#storm-control action shutdown B.Cisco 300-115 Exam must be enabled on the access VLAN for that interface. multicast. which creates excessive traffic and degrades network performance. • If you are enabling IP source guard on a trunk interface with multiple VLANs and DHCP snooping is enabled on all the VLANs. or unicast traffic storm on physical interfaces from either mistakes in network configurations or from users issuing a DoS attack. VLAN trunking Answer: A Explanation: A traffic storm occurs when packets flood the LAN. Any Time." . the source IP address filter is applied on all the VLANs.

1x on the same interface.com 122 ." . It allows port security to secure the IP address that 802. router(config-if)#storm-control action error D.cisco. Answer: A Explanation: 802.www.1x authenticates. or the shutdown and no shutdown commands to reenable ports.Cisco 300-115 Exam C. router(config-if)#storm-control action enable Answer: A Explanation: Configuring the Traffic Storm Control Shutdown Mode To configure the traffic storm control shutdown mode on an interface. It allows port security to secure the MAC address that 802. • Use the error disable detection and recovery feature. C. • Enter the no storm-control action shutdown command to revert to the default action (drop). Which option describes what this configuration allows? A.1x to secure the IP address that port security authenticates. perform this task: Command Purpose Step 1 Router(config)# interface {{type1 slot/port} | {port-channel number}} Selects an interface to configure. B. Reference: http://www.1x authenticates. It allows 802.actualtests.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/storm. It allows 802. D. Step 2 Router(config-if)# storm-control action shutdown (Optional) Configures traffic storm control to error-disable ports when a traffic storm occurs.html QUESTION NO: 131 A network engineer configures port security and 802. Any Time.1x to secure the MAC address that port security authenticates.1X and Port Security "Pass Any Exam.

802. you can configure MAC addresses to be sticky. static D. and added to the running configuration? A.1X processes packets before port security processes them.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nxos/security/configuration/guide/sec_nx-os-cfg/sec_portsec.1X authenticates. Any Time. dynamic C. the interface does not need to dynamically relearn them when the switch restarts. destination port for SPAN C. so when you enable both on an interface. stored in the address table. These can be dynamically learned or manually configured.www.Cisco 300-115 Exam You can configure port security and 802. static trunk ports B. stored in the address table.cisco.1X is already preventing inbound traffic on the interface from unknown MAC addresses. it is not recommended. If these addresses are saved in the configuration file. secure Answer: A Explanation: With port security.cisco. sticky B. 802.com 123 . Port security secures the MAC addresses that 802.1X on the same interfaces.actualtests. Reference: http://www.pdf QUESTION NO: 133 On which interface can port security be configured? A. Reference: http://www. EtherChannel port group "Pass Any Exam. Although sticky secure addresses can be manually configured. and added to the running configuration.com/c/en/us/td/docs/switches/lan/catalyst4500/122/25ew/configuration/guide/conf/port_sec.html QUESTION NO: 132 Which feature describes MAC addresses that are dynamically learned or manually configured." .

html QUESTION NO: 134 When you configure private VLANs on a switch. promiscuous B. which port type connects the switch to the gateway router? A. Any Time.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nxos/security/configuration/guide/sec_nx-os-cfg/sec_portsec. Details about port security and different types of interfaces or ports are as follows: •Access ports—You can configure port security on interfaces that you have configured as Layer 2 access ports. trunked Answer: A Explanation: There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port. Reference: http://en.www. •Ethernet Port Channels—Port security is not supported on Ethernet port channels. •Trunk ports—You can configure port security on interfaces that you have configured as Layer 2 trunk ports.actualtests. community C. •SPAN ports—You can configure port security on SPAN source ports but not on SPAN destination ports. dynamic access point Answer: A Explanation: Port Security and Port Types You can configure port security only on Layer 2 interfaces.com 124 . isolated D. Host port further divides in two types – Isolated port (I-Port) and Community port (C-port). VLAN maximums are not useful for access ports. Reference: http://www.cisco.wikipedia." .org/wiki/Private_VLAN "Pass Any Exam. port security applies only to the access VLAN. The device allows VLAN maximums only for VLANs associated with the trunk port.Cisco 300-115 Exam D. On an access port.

46 • Radius key: rad123 • Authentication should be implemented as close to the host as possible. promiscuous port B. For security reasons.40.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches. Any Time. Authentication is to be done via a Radius server: • Radius server host: 172. Host port further divides in two types – Isolated port (I-Port) and Community port (C-port).40.Cisco 300-115 Exam QUESTION NO: 135 When you configure a private VLAN." . it is necessary to restrict access to VLAN 20 in the following manner: • Users connecting to VLAN 20 via portfO/1 on ASW1 must be authenticated before they are given access to the network. access port Answer: A Explanation: There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port. The topology diagram indicates their layer 2 mapping.wikipedia. which type of port must you configure the gateway router port as? A. You must "Pass Any Exam. • Filtering should be implemented as close to the serverfarm as possible.www. The Radius server and application servers will be installed at a future date. • Devices on VLAN 20 are restricted to the subnet of 172.com 125 . • Packets from devices in any other address range should be dropped on VLAN 20. • Packets from devices in the subnet of 172.actualtests. isolated port C. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server. DSW1 and ASW1.0/24.120.org/wiki/Private_VLAN QUESTION NO: 136 CORRECT TEXT SWITCH.0/24 should be allowed on VLAN 20.40.120. You have been tasked with implementing the above access control as a pre-condition to installing the servers.120. Corporate polices do not allow layer 3 functionality to be enabled on the switches. community port D. Reference: http://en.

"Pass Any Exam.com 126 .Cisco 300-115 Exam use the available IOS switch features.www. Any Time." .actualtests.

46 key rad123 ASW1(config)#aaa authentication dot1x default group radius ASW1(config)#dot1x system-auth-control ASW1(config)#inter fastEthernet 0/1 ASW1(config-if)#switchport mode access ASW1(config-if)#dot1x port-control auto ASW1(config-if)#exit ASW1#copy run start Step2: Console to DSW1 from PC console 2 DSW1(config)#ip access-list standard 10 DSW1(config-ext-nacl)#permit 172.0.0 0." .www.0. Any Time.120.Cisco 300-115 Exam Answer: The configuration: Step1: Console to ASW1 from PC console 1 ASW1(config)#aaa new-model ASW1(config)#radius-server host 172.actualtests.40.255 DSW1(config-ext-nacl)#exit DSW1(config)#vlan access-map PASS 10 DSW1(config-access-map)#match ip address 10 DSW1(config-access-map)#action forward DSW1(config-access-map)#exit DSW1(config)#vlan access-map PASS 20 DSW1(config-access-map)#action drop DSW1(config-access-map)#exit DSW1(config)#vlan filter PASS vlan-list 20 DSW1#copy run start "Pass Any Exam.39.com 127 .120.

Any Time. 50 B.com/en/US/docs/switches/lan/catalyst3550/software/release/12. 1024 Answer: B Explanation: "Pass Any Exam." . standby group B.www.Cisco 300-115 Exam Topic 3. its state changes do not affect the hot standby priority of the configured device. If an interface is not tracked. 100 C. 120 D.com 128 . When a tracked interface fails. standby priority C. Infrastructure Services QUESTION NO: 137 Which configuration command ties the router hot standby priority to the availability of its interfaces? A. the hot standby priority on the device on which tracking has been configured decreases by 10. you can configure a separate list of interfaces to be tracked.1_19_ea1/config uration/guide/swhsrp. backup interface D.actualtests.cisco.html QUESTION NO: 138 What is the default HSRP priority? A. standby track Answer: D Explanation: The standby track interface configuration command ties the router hot standby priority to the availability of its interfaces and is useful for tracking interfaces that are not configured for HSRP. For each interface configured for hot standby. Reference: http://www.

The range is 1 to 255. the default is 0 (no delay before taking over). removes the need for a First Hop Redundancy Protocol Answer: D Explanation: First Hop Redundancy Protocols (FHRPs) such as VRRP and HSRP were designed to allow for a highly available first IP route hop for host systems. The range is 0 to 36000 (1 hour). The VSS system creates a single logical router at Layer 3. The VSS IP route is highly available due to MEC and the resiliency of the VSS system. • (Optional) preempt—Select so that when the local router has a higher priority than the active router.cisco. The highest number represents the highest priority.com 129 . FHRPs allow two (or more) distinct routers to share a common IP address providing a redundant Layer-3 default gateway for end nodes. Reference: http://www. • (Optional) group-number—The group number to which the command applies.com/en/US/docs/switches/lan/catalyst3550/software/release/12. • (Optional) delay—Set to cause the local router to postpone taking over the active role for the shown number of seconds.cisco.1_19_ea1/config uration/guide/swhsrp. Use the no form of the command to restore the default values.com/en/US/docs/solutions/Enterprise/Data_Center/vssdc_integrate. the default priority is 100.Cisco 300-115 Exam standby [group-number] priority priority [preempt [delay delay]] Set a priority value used in choosing the active router.actualtests. provides two independent supervisors with two different control planes D. Any Time.html#wp1044327 QUESTION NO: 139 Which option is a benefit of using VSS? A. Reference: http://www. VSS eliminates the need for FHRP at the aggregation layer of the data center. reduces cost B.html "Pass Any Exam. simplifies configuration C.www. it assumes control as the active router." . This VSS routing instance fulfills this firsthop role without the need for a dedicated protocol.

1 standby router. Scope Cisco proprietary IEEE standard Cisco proprietary Election Active Router:1-Highest Priority2-Highest IP (tiebreaker) Master Router: (*)1-Highest Priority2-Highest IP (tiebreaker) Active Virtual Gateway:1-Highest Priority2-Highest IP (tiebreaker) Optimization features Tracking yes "Pass Any Exam.Can use real router ip address..up to 4 AVF routers on the group (Active Virtual Forwarder) passing traffic.Use virtual ip address.Cisco 300-115 Exam QUESTION NO: 140 Which First Hop Redundancy Protocol is an IEEE Standard? A. . Any Time.1 or more listening routers. HSRP C. VRRP D. the one with highest priority become master. if not.actualtests.1 or more backup routers.. . . GLBP B..1 AVG (Active Virtual Gateway).." .Use virtual ip address. .1 active router. OSPF Answer: C Explanation: A comparison of the three First Hop Redundancy Protocols are listed below: ProtocolFeatures HSRP (Hot Standby Router protocol) VRRP (Virtual Redundancy Router Protocol) GLBP (Gateway Load Balancing Protocol) Router role .www.up to 1024 virtual routers (GLBP groups) per physical interface.com 130 ..1 master router. .

Weighted algorithm.0.102 udp 3222 Timers Hello – 3 seconds Advertisement – 1 second Hello – 3 seconds (Hold) 10 seconds (Master Down Interval)3 * Advertisement + skew time (Hold) 10 seconds (Skew time)(256-priority) / 256 Load-balancing functionality . .Cisco 300-115 Exam yes yes Preempt yes yes yes Timer adjustments yes yes yes Traffic type 224.0.18 – IP 112 224. Any Time. Requires appropriate distribution of Virtual GW IP per Clients for optimal load-balancing. Reference: http://cciethebeginning.Host-dependent algorithm.0.Multiple HSRP group per interface/SVI/routed int.com 131 .0..(generally through DHCP) Requires appropriate distribution of Virtual GW IP per Clients for optimal load-balancing.0.2 – udp 1985 (version1)224. Load-balancing oriented.wordpress.0.0.actualtests." .Round-Robin algorithm (default).0.Multiple VRRP group per interface/SVI/routed int. .(generally through DHCP) Clients are transparently updated with virtual MAC according to load-balancing algorithm through ARP requesting a unique virtual gateway.com/2008/08/23/router-high-availability-protocolcomparison-2/ QUESTION NO: 141 What is the default amount by which the hot standby priority for the router is decremented or "Pass Any Exam.102-udp 1985 (version2) 224.www.

A virtual forwarder that has learned the "Pass Any Exam.1_19_ea1/config uration/guide/swhsrp.cisco. 1 B. 6 D. 10 D. Gateways are assigned the next MAC address in sequence.com 132 . Other members of the GLBP group learn the virtual MAC addresses from hello messages. When a tracked interface fails. If an interface is not tracked.Cisco 300-115 Exam incremented when the interface goes down or comes back up? A. its state changes do not affect the hot standby priority of the configured device. Reference: http://www. The AVG is responsible for assigning the virtual MAC addresses to each member of the group. the hot standby priority on the device on which tracking has been configured decreases by 10. For each interface configured for hot standby.com/en/US/docs/switches/lan/catalyst3550/software/release/12. Any Time. 15 Answer: C Explanation: The standby track interface configuration command ties the router hot standby priority to the availability of its interfaces and is useful for tracking interfaces that are not configured for HSRP. 4 C. Other group members request a virtual MAC address after they discover the AVG through hello messages. 2 B. 8 Answer: B Explanation: GLBP Virtual MAC Address Assignment A GLBP group allows up to four virtual MAC addresses per group." .html QUESTION NO: 142 What is the maximum number of virtual MAC addresses that GLBP allows per group? A. you can configure a separate list of interfaces to be tracked. 5 C.www.actualtests. A virtual forwarder that is assigned a virtual MAC address by the AVG is known as a primary virtual forwarder.

com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html#wp1039651 QUESTION NO: 143 Which gateway role is responsible for answering ARP requests for the virtual IP address in GLBP? A.Cisco 300-115 Exam virtual MAC address is referred to as a secondary virtual forwarder. active virtual gateway D. designated router Answer: C Explanation: GLBP Active Virtual Gateway Members of a GLBP group elect one gateway to be the active virtual gateway (AVG) for that group. virtual router master B.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp. active virtual forwarder B.www. Load sharing is achieved by the AVG replying to the ARP requests with different virtual MAC addresses.cisco. The AVG is responsible for answering Address Resolution Protocol (ARP) requests for the virtual IP address.cisco. The AVG assigns a virtual MAC address to each member of the GLBP group.html QUESTION NO: 144 Which VRRP router is responsible for forwarding packets that are sent to the IP addresses of the virtual router? A.actualtests. Reference: http://www. These gateways are known as active virtual forwarders (AVFs) for their virtual MAC address. Any Time.com 133 . active virtual router C. Reference: http://www. Other group members provide backup for the AVG in the event that the AVG becomes unavailable. virtual router backup "Pass Any Exam. Each gateway assumes responsibility for forwarding packets sent to the virtual MAC address assigned to it by the AVG." .

Note that if the IP address owner is available. virtual router active D. will respond to packets addressed to one of these IP addresses for ICMP pings.ietf. when up. Any Time.www. then it will always become the Master. TCP connections. IP Address Owner The VRRP router that has the virtual router's IP address(es) as real interface address(es’. A VRRP Router may backup one or more virtual routers. Primary IP Address An IP address selected from the set of real interface addresses.org/rfc/rfc3768.com 134 . Reference: http://www. It consists of a Virtual Router Identifier and a set of associated IP address(es) across a common LAN. This is the router that." . and answering ARP requests for these IP addresses. Virtual Router Master The VRRP router that is assuming the responsibility of forwarding packets sent to the IP address(es) associated with the virtual router. VRRP advertisements are always sent using the primary IP address as the source of the IP packet. etc.Cisco 300-115 Exam C. virtual router standby Answer: A Explanation: VRRP Definitions VRRP Router A router running the Virtual Router Redundancy Protocol. It may participate in one or more virtual routers.actualtests. Virtual Router An abstract object managed by VRRP that acts as a default router for hosts on a shared LAN.txt "Pass Any Exam. One possible selection algorithm is to always select the first address.

" . standby follow D. standby 1 track 100 B. standby 1 track 100 decrement 5 D. Any Time.html "Pass Any Exam.com/en/US/docs/ios-xml/ios/ipapp_fhrp/configuration/15-mt/fhp-hsrpmgo. HSRP client groups follow the master HSRP with a slight. standby group backup Answer: C Explanation: Perform this task to configure multiple HSRP client groups. standby 1 track 100 decrement 1 C. Reference: http://www.com 135 .actualtests. QUESTION NO: 146 Which command configures an HSRP group to become a slave of another HSRP group? A.cisco. The “standby follow” command configures an HSRP group to become a slave of another HSRP group.www.Cisco 300-115 Exam QUESTION NO: 145 Which command correctly configures standby tracking for group 1 using the default decrement priority value? A. standby group track C. There is no need to explicitly state the value if the desired value is the default value. random delay so that all client groups do not change at the same time. standby 1 track 100 decrement 20 Answer: A Explanation: The default decrement value for HSRP standby tracking is 10. standby slave B.

Layer 2 loop Answer: D Explanation: This section provides information you can use to troubleshoot your configuration.0.com 136 . then it indicates that this router is receiving its own hello packets sent. permit the Multicast address by permit 224.0. Reference: http://www. When configuring the multicast boundary command.102 and User Datagram Protocol (UDP) port 3222 (source and destination). HSRP configured on same interface as GLBP D. If the interface MAC address is different from the one reported in the error message.0 15.Cisco 300-115 Exam QUESTION NO: 147 Refer to the exhibit. Unavailable GLBP active forwarder B.shtml#dr "Pass Any Exam.255. If the MAC address of the interface is the same as the one reported in the error message. Which option describes the reason for this message in a GLBP configuration? A. Incorrect GLBP IP address C.actualtests. then some other device with a MAC address reports this error message. Any Time. %GLBP-4-DUPADDR: Duplicate address The error message indicates a possible layer2 loop and STP configuration issues. Note: GLBP members communicate between each other through hello messages sent every 3 seconds to the multicast address 224." . Verify the spanning-tree topology and check if there is any layer2 loop.com/en/US/products/hw/switches/ps708/products_configuration_example09186a 00807d2520.cisco. In order to resolve this issue.255.www.0. issue the show interface command to verify the MAC address of the interface.255.0.

Cisco 300-115 Exam
QUESTION NO: 148
Ferris Plastics, Inc. is a medium sized company, with an enterprise network (access, distribution
and core switches) that provides LAN connectivity from user PCs to corporate servers. The
distribution switches are configured to use HSRP to provide a high availability solution.
• DSW1 –primary device for VLAN 101 VLAN 102 and VLAN 105
• DSW2 – primary device for VLAN 103 and VLAN 104
• A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its
status as the primary device, unless GigabitEthernet1/0/1 on backup device has also failed.
Troubleshooting has identified several issues. Currently all interfaces are up. Using the running
configurations and show commands, you have been asked to investigate and respond to the
following question.

"Pass Any Exam. Any Time." - www.actualtests.com

137

Cisco 300-115 Exam

During routine maintenance, GigabitEthernet1/0/1 on DSW1 was shut down. All other interfaces
were up. DSW2 became the active HSRP device for VLAN 101 as desired. However, after
GigabitEthemet1/0/1 on DSW1 was reactivated, DSW1 did not become the active router for VLAN
101 as desired. What needs to be done to make the group for VLAN 101 function properly?
A. Enable preempt in the VLAN 101 HSRP group on DSW1.
B. Disable preempt in the VLAN 101 HSRP group on DSW2’s.
C. In the VLAN 101 HSRP group on DSW1, decrease the priority value to avaluethatis less ‘ than
"Pass Any Exam. Any Time." - www.actualtests.com

138

Cisco 300-115 Exam
the priority value configured in the VLAN 101 HSRP group on DSW2.
D. Decrease the decrement value in the track command for the VLAN 101 HSRP group on U
DSWTs to a values less than the value in the track command for the VLAN 101 HSRP group on
DSW2.
Answer: A
Explanation:

QUESTION NO: 149
Ferris Plastics, Inc. is a medium sized company, with an enterprise network (access, distribution
and core switches) that provides LAN connectivity from user PCs to corporate servers. The
distribution switches are configured to use HSRP to provide a high availability solution.
• DSW1 –primary device for VLAN 101 VLAN 102 and VLAN 105
• DSW2 – primary device for VLAN 103 and VLAN 104
• A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its
status as the primary device, unless GigabitEthernet1/0/1 on backup device has also failed.
Troubleshooting has identified several issues. Currently all interfaces are up. Using the running
configurations and show commands, you have been asked to investigate and respond to the
following question.

"Pass Any Exam. Any Time." - www.actualtests.com

139

com 140 .actualtests." .www.Cisco 300-115 Exam "Pass Any Exam. Any Time.

D. it became necessary to shut down the GigabitEthernet1/0/1 interface on DSW1. The decrement value on DSW1 should be greaterthan 5 and less than 15." . The decrement value on DSW1 should be greaterthan 11 and less than 19.www. You have determined that there is an issue with the decrement value in the track command for the VLAN 102 HSRP group. The decrement value on DSW1 should be greaterthan 9 and less than 15. During this time. What needs to be done to make the group function properly? A. we should decrement value in the track command from 11 to 18. 0 B. Because 200 – 11 = 189 < 190 "Pass Any Exam. Any Time. C. The decrement value on DSWTs should be greaterthan 195 and less than 205. Answer: C Explanation: Use “show run” command to show.com 141 . The left Vlan102 is console1 of DS1.actualtests. All other interfaces were up.Cisco 300-115 Exam During routine maintenance. E. Priority value is 200. DSW1 remained the active device for the VLAN 102 HSRP group. The decrement value on DSWTs should be greaterthan 190 and less than 200.

actualtests. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. Using the running configurations and show commands. Any Time. • DSW1 –primary device for VLAN 101 VLAN 102 and VLAN 105 • DSW2 – primary device for VLAN 103 and VLAN 104 • A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device.Cisco 300-115 Exam (priority of Vlan102 on DS2).com 142 . QUESTION NO: 150 Ferris Plastics. Currently all interfaces are up. you have been asked to investigate and respond to the following question. unless GigabitEthernet1/0/1 on backup device has also failed." . "Pass Any Exam. The distribution switches are configured to use HSRP to provide a high availability solution.www. Troubleshooting has identified several issues. Inc. with an enterprise network (access. is a medium sized company.

decrease the priority value to a value less than 190 and greater than 150.www. increase the priority value to a value greater 200 and less than 250. On DSW2. On DSW1. B. On DSW1. As related to the VLAN 103 HSRP group. DSW2 has not become the active device for the VLAN 103 HSRP group. Any Time. "Pass Any Exam. what can be done to make the group function properly? A. On DSW2. increase the decrement value in the track command to a value greater than 10 and less than 50. D. disable preempt.actualtests.Cisco 300-115 Exam All interfaces are active.com 143 ." . C.

so the correct answer is to increase the priority to more than 200. is a medium sized company. • DSW1 –primary device for VLAN 101 VLAN 102 and VLAN 105 • DSW2 – primary device for VLAN 103 and VLAN 104 • A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. we see that the active router has a priority of 200. Inc. "Pass Any Exam. Using the running configurations and show commands.www. Currently all interfaces are up. but it should be less than 250 so that if the gig 1/0/1 interface goes down. Troubleshooting has identified several issues. unless GigabitEthernet1/0/1 on backup device has also failed. with an enterprise network (access. We need to increase the priority of DSW2 to greater than 200.Cisco 300-115 Exam Answer: C Explanation: From the output shown below of the HSRP status of DSW2. but less than 250. DSW2 is configured to decrement the priority by 50 if this interface goes down.actualtests." . QUESTION NO: 151 Ferris Plastics. DSW1 will become active. while the local priority is 190. Any Time.com 144 . distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. you have been asked to investigate and respond to the following question. The distribution switches are configured to use HSRP to provide a high availability solution.

Any Time." .Cisco 300-115 Exam "Pass Any Exam.www.com 145 .actualtests.

Any Time. what can to be done to make the group function properly? A. D. DSW1 became the active router for the VLAN 104HSRP group. On DSW2 decrease the priority value to a value less than 150. It can not become active device when G1/0/1 on DS2 fail. C. Vlan104 (left): 150 – "Pass Any Exam.Cisco 300-115 Exam During routine maintenance. Answer: C Explanation: We should NOT disable preempt on DS1. If increase the decrement in the track value to a value greater than 6 (> or = 6). In this question. On DSW1. you will make Vlan104’s HSRP group fail function. Vlan104 (right): 200 – 155 = 145. Result is priority 149 > 145 (Vlan104 on DS1 is active). On DSW1. As related to the VLAN 104HSRP group.www.com 146 . During this time. Example: if we are disable preempt on DS1. increase the decrement value in the track command to a value greater than 6. it became necessary to shut down the GigabitEthernet1/0/1 interface on DSW1 and DSW2." . decrease the decrement value in the track command to a value less than 1. disable preempt.actualtests. G0/1/0 on DS1 & DS2 is shutdown. All other interfaces were up. B. On DSW1. Vlan104 (left): 150 – 1 = 149. By do that.

• DSW1 –primary device for VLAN 101 VLAN 102 and VLAN 105 • DSW2 – primary device for VLAN 103 and VLAN 104 • A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. with an enterprise network (access.Cisco 300-115 Exam 6 = 144. you have been asked to investigate and respond to the following question. Currently all interfaces are up. Inc. Troubleshooting has identified several issues. is a medium sized company.actualtests. QUESTION NO: 152 Ferris Plastics. "Pass Any Exam. unless GigabitEthernet1/0/1 on backup device has also failed. The distribution switches are configured to use HSRP to provide a high availability solution.com 147 .www. Any Time. Using the running configurations and show commands." . Result is priority 144 < 145 (vlan104 on DS2 is active). distribution and core switches) that provides LAN connectivity from user PCs to corporate servers.

Any Time. 200 Answer: B "Pass Any Exam. 150 D.actualtests.Cisco 300-115 Exam What is the priority value of the VLAN 105 HSRP group on DSW2? A.com 148 . 100 C." .www. 50 B.

www.Cisco 300-115 Exam Explanation: Use "show standby brief" command on console2.actualtests. The distribution switches are configured to use HSRP to provide a high availability solution. is a medium sized company.primary device for VLAN 103 and VLAN 104 • A failure–of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. you have been asked to investigate and respond to the following question. unless GigabitEthernet1/0/1 on backup device has also failed. Currently all interfaces are up. Inc.com 149 . with an enterprise network (access. Troubleshooting has identified several issues. • DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 • D–W2 . QUESTION NO: 153 Ferris Plastics. Any Time. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. Very easy to se“ priority of Vlan1”5 is 100. "Pass Any Exam. Using the running configurations and show commands." .

Any Time.www." .Cisco 300-115 Exam "Pass Any Exam.com 150 .actualtests.

what will be the resulting priority value of the VLAN 105 HSRP group on router DSW2? A. and the tracking feature for Gig 1/0/0 is enabled which will decrement the priority by 10 if this interface goes down for a priority value of 90. 100 C.actualtests. 200 Answer: A Explanation: Explanation As seen below. the current priority for VLAN 105 is 100.www.Cisco 300-115 Exam If GigabitEthemet1/0/1 on DSW2 is shutdown." . 150 D. 90 B.com 151 . Any Time. "Pass Any Exam.

Any Time.actualtests." . They have questions about how these two devices will perform in the event of a device failure.com 152 .www. "Pass Any Exam.Cisco 300-115 Exam QUESTION NO: 154 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP.

" . Any Time. R2-100% D.com 153 .10. R1-50 %.actualtests.www.16.Cisco 300-115 Exam What percentage of the outgoing traffic from the 172. R2-50% C. R1-0% B.0/24 subnet is being forwarded through R1? A. R1-100% "Pass Any Exam.

They have questions about how these two devices will perform in the event of a device failure. "Pass Any Exam. so all outgoing traffic will be forwarded to R1. we see that R1 is the active standby router for the Ethernet 0/0 link. Any Time.actualtests. QUESTION NO: 155 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP.com 154 .www." .Cisco 300-115 Exam Answer: D Explanation: Based on the following output.

Any Time.com 155 .Cisco 300-115 Exam "Pass Any Exam.actualtests." .www.

Cisco 300-115 Exam Refer to the exhibit. Any Time. The interface will have its current priority incremented by 60 for HSRP group 1 E. The interface will have the priority decremented by 60 for HSRP group 1 C. The interface will have the priority decremented by 40 for HSRP group 1." . which of the statement regarding HSRP priority is true? A.www.com 156 . If router R1 interface Etherne0/0 goes down and recovers. The interface will have its current priority incremented by 40 for HSRP group 1 D. The interface will default to the a priority of 100 for HSRP group 1 Answer: C Explanation: Here is the HSRP configuration seen on R1: "Pass Any Exam.actualtests. B.

" .actualtests.www. "Pass Any Exam. Any Time.Cisco 300-115 Exam Here. the standby 1 track decrement command will lower the priority from 130 to 90.com 157 . when the Ethernet 0/0 interface goes down. it will then increment it by 40 back to 130 for HSRP group 1. when it comes back up. QUESTION NO: 156 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP. However. They have questions about how these two devices will perform in the event of a device failure.

com 158 . Any Time.www." .actualtests.Cisco 300-115 Exam "Pass Any Exam.

we see that authentication is configured on R2.www. but not on R1: "Pass Any Exam. The HSRP group priorities are different Answer: B Explanation: Based on the configuration output. The HSRP Hello packets are blocked D. The HSRP group authentication is misconfigured C. The HSRP timers mismatch E.Cisco 300-115 Exam What issue is causing Router R1 and R2 to both be displayed as the HSRP active router for group 2? A. Any Time.actualtests. The HSRP group number mismatch B." .com 159 .

www. QUESTION NO: 157 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP. "Pass Any Exam.actualtests. They have questions about how these two devices will perform in the event of a device failure. Any Time.com 160 ." .Cisco 300-115 Exam This can be further verified by issuing the “show standby” command on each router.

www." .actualtests.Cisco 300-115 Exam "Pass Any Exam.com 161 . Any Time.

" .0c07. Any Time.com 162 .0000.ac02 B. 0000.0c07.0c07.0010 C. 0000. 4000.actualtests.www.0010 as shown below: "Pass Any Exam.Cisco 300-115 Exam What is the virtual mac-address of HSRP group 1? A. 0000.ac02 F.ac01 E.0000.ac01 D.0010 Answer: B Explanation: Issuing the “show standby” command on either router shows us that the virtual MAC used by HSRP group 1 is 4000. 4000. 4000.0000.0000.

spanning-tree bpduguard default C. Any Time. When troubleshooting a network problem. no spanning-tree link-type shared Answer: C Explanation: "Pass Any Exam. a network analyzer is connected to Port f0/1 of a LAN switch." .com 163 . spanning-tree portfast bpdufilter default D.www.actualtests.Cisco 300-115 Exam Topic 4. spanning-tree portfast bpduguard enable B. Mix QUESTIONS QUESTION NO: 158 Refer to the exhibit. Which command can prevent BPDU transmission on this port? A.

D. The local switch is overloaded with the amount of sourced traffic that must be replicated to the remote switch.Cisco 300-115 Exam QUESTION NO: 159 Which four LACP components are used to determine which hot-standby links become active after an interface failure within an EtherChannel bundle? (Choose four. a Network Administrator noticed that one port stops receiving UDLD packets.actualtests. Which option describes what causes the port to go into the errdisable state? "Pass Any Exam.www. hot-standby link identification number G. This port continues to reestablish until after eight failed retries. Which type of misconfiguration is a cause? A.D. interface MAC address D. Answer: A Explanation: QUESTION NO: 161 After UDLD is implemented.com 164 ." .E Explanation: QUESTION NO: 160 RSPAN has been configured on a Cisco Catalyst switch. The local RSPAN switch is replicating only Rx traffic to the remote switch. LACP port priority C. system ID E. however. The port then transitions into the errdisable state.) A. LACP system priority B. interface bandwidth Answer: A. traffic is not being replicated to the remote switch. The RSPAN designated VLAN is missing the remote span command. Any Time. port number F.B. C. B. The local and remote RSPAN switches are configured using different session IDs.

" . RSTP D. Any Time.actualtests. BPDUignore D. Which spanning-tree feature accomplishes this? A.com 165 . The engineer does not want this switch participating in Spanning Tree with the rest of the network. PVST+ C.Cisco 300-115 Exam A. however. BPDUguard E. end user connectivity is still required. UDLD is enabled globally. Normal UDLD operations that prevent traffic loops. C. D. STP Answer: A Explanation: QUESTION NO: 163 A network engineer is installing a switch for temporary workers to connect to. a network engineer decides to create a separate spanning tree for every group of 10 VLANs. Answer: B Explanation: QUESTION NO: 162 To follow the Layer 2 switching guidelines. B. UDLD timers are inconsistent. MST B. BPDUfilter C.www. UDLD port is configured in aggressive mode. BPDUblock B. Which version of spanning tree is appropriate to meet the company policy? A. BPDUdisable Answer: B Explanation: "Pass Any Exam. RPVST+ E.

Cisco 300-115 Exam QUESTION NO: 164 Refer to the exhibit. which action must be performed for the configuration to take effect? A. D. C.www. Any Time.actualtests. Configure a SPAN session to monitor the received traffic on interface g0/5 only for VLAN 3. reload B. shutdown C. What is the result of the SPAN configuration on a Cisco switch? A. Configure a SPAN session to monitor the received traffic on interface g0/4 only for VLAN 3. Answer: A Explanation: QUESTION NO: 165 When SDM templates are configured. backup config Answer: A Explanation: QUESTION NO: 166 Which statement about the MAC address sticky entries in the switch when the copy run start command is entered is true? "Pass Any Exam.com 166 . B. Configure a SPAN session to monitor the received traffic on interface g0/5 for all VLANs except VLAN 3." . Configure a SPAN session to monitor the received traffic on interface g0/4 for all VLANs except VLAN 3. write memory D.

A sticky MAC address can be a unicast or multicast address. A sticky MAC address is retained when the switch reboots. Answer: A Explanation: QUESTION NO: 167 Enablement of which feature puts the port into err-disabled state when the port has PortFast enabled and it receives BPDUs? A. EtherChannel D. "Pass Any Exam. BackboneFast C. A sticky MAC address ages out of the MAC address table after 600 seconds. BPDU filtering B.com 167 . D. C." .www. BPDU guard Answer: D Explanation: QUESTION NO: 168 Refer to the exhibit. A sticky MAC address is lost when the switch reboots. B.actualtests.Cisco 300-115 Exam A. Any Time.

DSW1(config)#cdp holdtime 90 E. They go down until they are reassigned to a VLAN. Which state are these interfaces in after the VLAN is deleted? A. DSW1(config)#cdp timer 90 B. and then the VLAN is deleted. DSW1(config)#cdp timer 30 D. DSW1(config-if)#cdp timer 60 Answer: C Explanation: QUESTION NO: 169 Interfaces are assigned to a VLAN. but they are reassigned to the default VLAN.www. DSW1(config-if)#cdp holdtime 60 C. Any Time.com 168 . They remain up. B. DSW1(config-if)#cdp holdtime 30 F. "Pass Any Exam." .actualtests.Cisco 300-115 Exam Which configuration ensures that the Cisco Discovery Protocol packet update frequency sent from DSW1 to ALS1 is half of the default value? A.

" . QoS D.actualtests. Answer: B Explanation: QUESTION NO: 170 Which feature is automatically configured when an administrator enables a voice VLAN? A.Cisco 300-115 Exam C.1Q trunking B. Which version of VTP supports these extended VLANs? "Pass Any Exam. It can cause network access ports to go into err-disabled state. They go down. It can cause a network-wide VLAN configuration change if the revision number on the new switch is lower. It can cause routing loops.com 169 . PortFast C. but they are reassigned to the native VLAN. B. They remain up. Answer: B Explanation: QUESTION NO: 172 A network administrator configures 10 extended VLANs ranging from VLANs 3051 to 3060 in an enterprise network. Any Time. C.www. D. D. 802. but they are reassigned to the default VLAN. It can cause a network-wide VLAN configuration change if the revision number on the new switch is higher. private VLANs Answer: B Explanation: QUESTION NO: 171 Which statement describes one major issue that VTP can cause in an enterprise network when a new switch is introduced in the network in VTP mode server? A.

" . C. VTP does not recognize extended VLANs. desirable D. Answer: C Explanation: QUESTION NO: 173 An engineer is configuring an EtherChannel between two switches using LACP. The IP address is assigned via DHCP only. version 2 C. on E. The IP address is placed on the lowest numbered member port. Any Time. auto C. which two modes on switch 2 establish an operational EtherChannel? (Choose two. which statement about placement of the IP address is true? A. passive Answer: A.) A. The IP address is placed on the highest numbered member port. The IP address is placed on the port-channel logical interface.com 170 . version 1 B.E Explanation: QUESTION NO: 174 When a Layer 2 EtherChannel is configured. D. B. Answer: B Explanation: QUESTION NO: 175 Which option is valid for EtherChannel load balancing? "Pass Any Exam.actualtests. version 3 D.Cisco 300-115 Exam A. active B.www. If the EtherChannel mode on switch 1 is configured to active.

actualtests. The port channel interface numbers do not match. "Pass Any Exam. The EtherChannel protocols do not match. C. which option describes the reason for this error? A. Based on the output.Cisco 300-115 Exam A.www. Switch 2 has too many member ports configured. destination MAC address and destination IP address C. An engineer is configuring EtherChannel between two switches and notices the console message on switch 2. source MAC address and source IP address B. source MAC address and destination MAC address Answer: D Explanation: QUESTION NO: 176 Refer to the exhibit. B. Switch 1 does not have enough member ports configured." .com 171 . D. source MAC address and destination IP address D. Any Time.

com 172 .Cisco 300-115 Exam Answer: D Explanation: QUESTION NO: 177 Refer to the exhibit." . revision number.actualtests. and VLAN-to-instance mapping as shown on DSW2. and VLAN-to-instance mapping as shown on DSW2. it automatically inherits MST configuration from DW2. DSW2 uses the VTP server mode to automatically propagate the MST configuration to DSW1. E. DSW1 should share the same MST region with switch DSW2. B. C. DSW1 automatically inherits MST configuration from DSW2 because they have the same domain name.www. Configure DSW1 with the same region name. Answer: D Explanation: "Pass Any Exam. therefore. DSW1 is in VTP client mode with a lower configuration revision number. Configure DSW1 with the same version number. D. Which statement is true? A. Any Time.

"Pass Any Exam. 128 Gbps Answer: B Explanation: QUESTION NO: 180 Refer to the exhibit. B. The destination port does not participate in STP.com 173 . The source port can be monitored in multiple SPAN sessions. 64 Gbps D. The destination port can be destination in multiple SPAN sessions. 32 Gbps C.D Explanation: QUESTION NO: 179 In a switch stack environment.Cisco 300-115 Exam QUESTION NO: 178 Which two statements about SPAN source and destination ports during an active session are true? (Choose two. C. D. E.actualtests.) A. 16 Gbps B. Any Time. what is the total bidirectional traffic flow between two logical counter-rotating paths? A.www. Answer: B. You can mix individual source ports and source VLANs within a single session." . The source port can be only an Ethernet physical port.

www. spanning trees D. routing information Answer: C Explanation: "Pass Any Exam. D.com 174 .Cisco 300-115 Exam Which statement about the SPAN and RSPAN configuration on SW1 is true? A. Any Time.actualtests. VLAN database B. B. SPAN session 2 monitors all traffic entering and exiting port FastEthernet 0/15." . RSPAN session 1 monitors activity on VLAN 50 of a remote switch. DHCP snooping database C. Answer: C Explanation: QUESTION NO: 181 Which information does the subordinate switch in a switch stack keep for all the VLANs that are configured on it? A. RSPAN session 1 is incompletely configured for monitoring. C. SPAN session 2 only monitors egress traffic exiting port FastEthernet 0/14.

off D. learning Answer: A Explanation: QUESTION NO: 185 "Pass Any Exam. Layer 2 C. Any Time. 2000 bindings C. 5000 bindings D. 8000 bindings Answer: D Explanation: QUESTION NO: 183 On which layer does IP source guard provide filtering to prevent a malicious host from impersonating the IP address of a legitimate host? A. what is the state of port security on a switch? A. on C.actualtests. disabled B." . Layer 1 B.com 175 .www. 1000 bindings B. Layer 3 D.Cisco 300-115 Exam QUESTION NO: 182 Which option is the minimum number of bindings that the DHCP snooping database can store? A. Layer 7 Answer: B Explanation: QUESTION NO: 184 By default.

Which option is the most likely explanation of the duplicate address message logged? A. VRRP has one master router. one standby router.10. HSRP misconfiguration C.) A. spanning-tree loop B. C. GLBP. GLBP allows for a maximum of four MAC addresses per group. VRRP is a Cisco proprietary protocol. a PC with IP of 10. and VRRP are true? (Choose two. Any Time.1. E." . and many listening routers. Answer: C. D. a hardware problem Answer: B Explanation: QUESTION NO: 187 DRAG DROP Drag and drop the characteristic from the left to the matching Layer 2 protocol on the right.D Explanation: QUESTION NO: 186 Refer to the exhibit.1 D.www. B.Cisco 300-115 Exam Which two statements about HSRP.com 176 . HSRP supports up to 255 groups on the same switch or router. HSRP is the preferred protocol to be used on multivendor environments. "Pass Any Exam.actualtests.

www." .Cisco 300-115 Exam Answer: Explanation: "Pass Any Exam. Any Time.actualtests.com 177 .

is no longer working." . such as CDP and VTP.com 178 . A network engineer changes the default native VLAN to VLAN 999. the switch control traffic.actualtests. What is wrong with the configuration? "Pass Any Exam.www. Any Time. After applying the settings on the uplinks to the core switches. The standard configuration is used for each uplink.Cisco 300-115 Exam QUESTION NO: 188 Refer to the exhibit.

The switchport that is configured for VLAN 50 is the primary connection to the spanning-tree root switch. A network engineer notices that there are issues with the physical cabling of the current root port.D Explanation: QUESTION NO: 190 An access switch at a remote location is connected to the spanning-tree root with redundant uplinks. Any Time. Which action accomplishes this task? A. D.com 179 . C. Answer: A.Cisco 300-115 Exam A. Answer: D Explanation: QUESTION NO: 189 Which two options are two results of using the command spanning-tree vlan 50 root primary within a spanning-tree network under global configuration? (Choose two.actualtests. Adjust the secondary link to have a lower priority than the primary link. Answer: C "Pass Any Exam.www. E.) A. The spanning-tree timers are reduced to improve the convergence time for VLAN 50. Enable Rapid Spanning Tree to converge using the secondary link. The native VLAN is not present on the trunk. Change the link-type to point-to-point. B. The interface is administratively down." . C. The control traffic must be manually enabled on the new native VLAN. E. The priority value for VLAN 50 is set to 4094 on the root while the local switch priority is set to 32768. C. Apply a BPDU filter on the primary interface of the remote switches. D. B. The encapsulation type is incorrect. The switchport mode trunk command should be first in the output. All ports that are configured on the current switch with VLAN 50 transition to designated ports. Spanning tree determines the priority of the current root for VLAN 50 and reduces the priority of the local switch to a lower value. B. The engineer decides to force the secondary link to be the desired forwarding root port. D.

apply root guard to all outgoing neighbor interfaces D.www. What action will accomplish this task? A. Any Time.Cisco 300-115 Exam Explanation: QUESTION NO: 191 A network engineer wants to make sure that an access switch will never become a Spanning Tree root for VLAN 5.com 180 . adjust STP priority to the maximum value B. enable MSTP and use a different revision number than all other switches Answer: A "Pass Any Exam." . disable STP globally C.actualtests.