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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

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

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

www. switch1 channel-group 1 mode active switch2 channel-group 1 mode auto B.com 6 .actualtests. switch1 channel-group 1 mode desirable switch2 channel-group 1 mode auto Answer: D Explanation: "Pass Any Exam." . switch1 channel-group 1 mode on switch2 channel-group 1 mode auto D.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 desirable switch2 channel-group 1 mode passive C. Any Time.

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. a usable EtherChannel exists only when an interface group in the on mode is connected to another interface group in the on mode. in which the interface responds to PAgP packets it receives but does not start PAgP packet negotiation. in which the interface starts negotiations with other interfaces by sending PAgP packets. This setting minimizes the transmission of LACP packets.com 7 . 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. in which the interface responds to LACP packets that it receives.cisco. Reference: http://www. auto Places an interface into a passive negotiating state.www. in which the interface starts negotiations with other interfaces by sending LACP packets. trunking state and VLAN numbers. for Layer 2 EtherChannels. 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. desirable Places an interface into an active negotiating state.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.html "Pass Any Exam.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/121_13_ea1/configuration/guide/3550scg/swethchl. With the on mode.actualtests. 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. This setting minimizes the transmission of PAgP packets. Any Time. Interfaces can form an EtherChannel when they are in different PAgP modes as long as the modes are compatible. but does not start LACP packet negotiation." . passive Places an interface into a passive negotiating state. For example: •An interface in the desirable mode can form an EtherChannel with another interface that is in the desirable or auto mode.

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

a VLAN cannot become a source. A monitor session on the distribution switch with a physical interface as the source and the remote SPAN VLAN as the destination B. A monitor session on the distribution switch with a remote SPAN VLAN as the source and physical interface as the destination E. Reference: http://www. A remote SPAN VLAN on the distribution and access layer switch C. Which three items must be configured to mirror traffic to a packet sniffer that is connected to the distribution switch? (Choose three.com 9 . Any Time.Cisco 300-115 Exam cannot be enabled.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.cisco.www.C. A monitor session on the access switch with a remote SPAN VLAN source and the physical interface as the destination F. If VLAN filtering is configured." . A monitor session on the distribution switch with a physical interface as the source and a physical interface as the destination Answer: B.actualtests. A monitor session on the access switch with a physical interface source and the remote SPAN VLAN as the destination D.html#wp38 75419997 QUESTION NO: 6 Refer to the exhibit.

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

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

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

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

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

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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a network administrator can manually disable a port Reference: http://www. The switch does not have the processing power to ensure rapid transition for all ports. A port that operates in full-duplex is assumed to be point-to-point. Any Time. To have two links to the same collision domain.html QUESTION NO: 18 Which technique automatically limits VLAN traffic to only the switches that require it? A.actualtests.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. not on trunk links. while a half-duplex port is considered as a shared port by default. RSTP has been enabled per interface and not globally. the switch must be attached to a hub. This automatic link type setting can be overridden by explicit configuration.Cisco 300-115 Exam (collision domain). Answer: C Explanation: RSTP can only achieve rapid transition to the forwarding state on edge ports and on point-to-point links. What is the reason for this? A. The STP root bridge selection is forcing key ports to remain in non-rapid transitioning mode. access lists "Pass Any Exam. In switched networks today. STP is unable to achieve rapid transition for trunk links.cisco.cisco." . it has been determined that several ports are not transitioning as they should. After testing.com 18 .com/c/en/us/support/docs/lan-switching/spanning-treeprotocol/24062-146. B. * Disabled port – Not strictly part of STP.www. The link type is automatically derived from the duplex mode of a port. Reference: http://www. C. This makes them candidates for rapid transition to the forwarding state. D.com/c/en/us/support/docs/lan-switching/spanning-treeprotocol/24062-146.

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

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

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

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

all channels (manually configured. Answer: B Explanation: An etherchannel will form if one end is active and the other is passive.html#wp1020804 QUESTION NO: 24 "Pass Any Exam. Any Time." .cisco. This is true for the switch globally. Reference: http://www.www. or LACP) use the same load-balancing. As a result. The EtherChannels would form and both devices would use the dst-ip load-balancing method because Switch1 is configured with EtherChannel mode active.com/c/en/us/td/docs/switches/lan/catalyst4500/122/54sg/configuration/guide/config/channel. 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. although each switch involved in the etherchannel can have non matching parameters for load balancing.com 23 . PagP.actualtests.Cisco 300-115 Exam methods do not match. D.

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

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

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

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

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

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

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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35

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

Example output: SW2#show spanning-tree vlan 10 VLAN0010 Spanning tree enabled protocol rstp Root ID Priority 24586 Address 0014. enable the STP PortFast feature.com 37 .com/library/content.4180 "Pass Any Exam.f2d2. Any Time. switch# show spanning-tree vlan 10 B. switch# show spanning-tree brief D.Cisco 300-115 Exam In order to allow immediate transition of the port into forwarding state.actualtests. PortFast immediately transitions the port into STP forwarding mode upon linkup.informit.www.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. So if the port is to be a part of the loop. the port eventually transitions into STP blocking mode. Example configuration: Switch-C# configure terminal Switch-C(config)# interface range fa0/3 . switch# show spanning-tree vlan 10 brief Answer: A Explanation: Command Description show spanning-tree Displays information about the spanning-tree state. switch# show spanning-tree summary E." . The port still participates in STP. switch# show spanning-tree bridge C.24 Switch-C(config-if-range)# sp–nning-tree portfast Reference: http://www.

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

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. on the other hand.dionicio. MST. PVST+ E. Any Time.com 39 .1w RST algorithm to multiple spanning trees.www. uses a minimum number of STP instances to match the number of physical topologies present. RSTP B. The network is expected to grow and add many new VLANs in the future. Which Spanning Tree Protocol should be used to reduce switch resources and managerial burdens that are associated with multiple spanning-tree instances? A.net/configuring-cisco-vtp/ QUESTION NO: 47 A network engineer is setting up a new switched network. featuring an access Switch A." . In this setup. PVRST+ runs STP instances for each VLAN and does not take into consideration the physical topology that might not require many different STP topologies. connected to two Building Distribution submodule Switches D1 and D2. Figure 3-15 shows a common network design. RPVST+ Answer: C Explanation: Multiple Spanning Tree (MST) extends the IEEE 802. 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.Cisco 300-115 Exam •MD5 encryption hash code Reference: https://rowell. PVST C. there are 1000 VLANs. MST D.actualtests. "Pass Any Exam.

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

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

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

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

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

C. by default. B. Reference: http://www.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b.actualtests.cisco.www.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. It specifically provides "Pass Any Exam. LLDP-MED is an extension to LLDP that operates between endpoint devices and network devices. LLDP-MED is an extension to LLDP that operates only between network devices. D. the timeout feature is disabled. LLDP-MED is an extension to LLDP that operates only between endpoint devices." . LLDP-MED is an extension to LLDP that operates between routers that run BGP.com 45 . 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. Any Time.shtml QUESTION NO: 55 Which statement about LLDP-MED is true? A.

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

Cisco 300-115 Exam Explanation: Type-Length-Value fields (TLVs) are blocks of information embedded in CDP advertisements. for example. Version TLV Contains information about the software release version on which the device is running. Eth 1/0.1Q protocol. a switch. for example. Full/Half Duplex TLV Indicates status (duplex configuration) of CDP broadcast interface. Used by network operators to verify VTP domain configuration in adjacent network nodes.com/en/US/docs/ios/12_2/configfun/configuration/guide/fcf015. per interface. Table 21 summarizes the TLV definitions for CDP advertisements. Table 21 Type-Length-Value Definitions for CDPv2 TLV Definition Device-ID TLV Identifies the device name in the form of a character string. Any Time. This information is in the form of the interface protocol and port number. Address TLV Contains a list of network addresses of both receiving and sending devices. VTP Management Domain TLV Advertises the system’s configured VTP management domain name-string.com 47 . Cisco 4500. IP Network Prefix TLV Contains a list of network prefixes to which the sending device can forward IP packets." . Port-ID TLV Identifies the port on which the CDP packet is sent. Platform TLV Describes the hardware platform name of the device.www.html QUESTION NO: 58 Which option describes a limitation of LLDP? "Pass Any Exam. Used by network operators to diagnose connectivity problems between adjacent network elements. CDP learns the native VLAN for an interface. Native VLAN TLV Indicates. This feature is implemented only for interfaces that support the IEEE 802. Capabilities TLV Describes the functional capability for the device in the form of a device type. the assumed VLAN for untagged packets on the interface. for example.actualtests. Reference: http://www.cisco.

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.cisco.com 48 . B.actualtests.Cisco 300-115 Exam A.com/en/US/technologies/tk652/tk701/technologies_white_paper0900aecd804cd4 6d.html "Pass Any Exam. C. LLDP cannot provide information about VTP. LLDP does not support TLVs." . Any Time. LLDP can discover up to two devices per port. D.www. 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. LLDP can discover only Windows servers.

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

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

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

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

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

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

com 55 . •The voice VLAN should be present and active on the switch for the IP phone to correctly communicate on the voice VLAN. port-security C.com/en/US/docs/switches/lan/catalyst2950/software/release/12. the Port Fast feature is not automatically disabled. spanning tree D. Reference: http://www. When you disable voice VLAN.1Q tag in an Ethernet frame "Pass Any Exam. within the Ethernet header B.cisco.actualtests.1q header found? A.Cisco 300-115 Exam A. within the Ethernet payload C. within the Ethernet source MAC address Answer: A Explanation: Frame format Insertion of 802.1_22_ea11x/conf iguration/guide/swvoip.html QUESTION NO: 68 In which portion of the frame is the 802. •The Port Fast feature is automatically enabled when voice VLAN is configured." . within the Ethernet FCS D. Any Time. storm control Answer: A Explanation: Voice VLAN Configuration Guidelines •You should configure voice VLAN on switch access ports. Use the show vlan privileged EXEC command to see if the VLAN is present (listed in the display).www. portfast B.

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

Cisco 300-115 Exam VTP ensures that all switches in the VTP domain are aware of all VLANs. Answer: C Explanation: Only VTP servers can add new VLANs to the switched network.com/c/en/us/support/docs/lan-switching/vtp/1055821. B.com 57 . All unknown unicasts and broadcasts in a VLAN are flooded over the entire VLAN.www. Update the VTP revision number. Then. VTP pruning is a feature that you use in order to eliminate or prune this unnecessary traffic. there are occasions when VTP can create unnecessary traffic. Change VTP mode to server and enable 802.1q. Reference: http://www. QUESTION NO: 72 Refer to the exhibit.1q. you will need to enable 802. Any Time. D.actualtests. However. Which action resolves this problem? A. C.html#vtp_pruning QUESTION NO: 71 Refer to the exhibit. so to enable vlan 10 on this switch you will first need to change the VTP mode from client to server. even in situations in which few users are connected in that VLAN.1q. The users in an engineering department that connect to the same access switch cannot access the network. Disable VTP pruning and disable 802.1Q trunking to pass this new VLAN along to the other switches. Enable VTP pruning and disable 802.cisco. "Pass Any Exam. The network engineer found that the engineering VLAN is missing from the database. All switches in the network receive all broadcasts." .

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

but versions 1 and 2 do not.www. Which Cisco IOS switching feature can be used to achieve the task? A. Link Aggregation Protocol at the access layer C. Cisco Discovery Protocol version 1 carries native VLAN information. QUESTION NO: 74 Which statement about using native VLANs to carry untagged frames is true? A. Any Time. dot1q VLAN trunking D. 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. Of these. Answer: A Explanation: "Pass Any Exam.1Q is supported by multiple vendors since ISL is a Cisco proprietary protocol. B. Cisco Discovery Protocol version 3 carries native VLAN information. 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." . Cisco Discovery Protocol version 1 and version 2 carry native VLAN information. but version 1 does not. only 802.1Q and ISL. 802. The VTP domain names do match and they are both VTP servers so there are no issues there.com 59 .actualtests. C. There are 2 different methods for trunking. PPP encapsulation with a virtual template B. Cisco Discovery Protocol version 2 carries native VLAN information. but version 2 does not. D. Consider that this is a multivendor environment.Cisco 300-115 Exam there is a problem with VTP or the trunking interfaces. 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.

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

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

4-bytes including native VLAN D. Support less than 1500 MTU B.1_13_ea1/config uration/guide/swtunnel. Support 1522 layer 3 IP and IPX packet D. Reference: http://www. 4-bytes except the native VLAN B.html QUESTION NO: 79 Refer to the exhibit. 8-bytes including native VLAN "Pass Any Exam. 8-bytes except the native VLAN C." .actualtests.cisco. 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.1Q tunneling (Q-in-Q) feature increases the frame size by 4 bytes when the extra tag is added.com/en/US/docs/switches/lan/catalyst3550/software/release/12.www. Because the 802. Any Time.com 62 .Cisco 300-115 Exam QUESTION NO: 78 What is required for a LAN switch to support 802.1q Q-in-Q encapsulation? A. Support 1547 MTU only Answer: B Explanation: The default system MTU for traffic on Catalyst switches is 1500 bytes. Support 1504 MTU or higher C. How many bytes are added to each frame as a result of the configuration? A.

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

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

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

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

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

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

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

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

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

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.www. Modify the spanning-tree port-priority on SW2 f1/1 to 0 and f1/0 to 16. B. 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. D. C. "Pass Any Exam. A lower path cost represents higher-speed transmission and is preferred. Modify the spanning-tree port-priority on SW2 f1/1 to 16 and f1/0 to 0. Any Time.actualtests. STP puts the LAN port with the lowest LAN port number in the forwarding state and blocks other LAN ports. Answer: C Explanation: If a loop occurs.Cisco 300-115 Exam f1/0 and f1/1 have the same end-to-end path cost to the designated bridge. Modify the spanning-tree port-priority on SW1 f1/1 to 16 and f1/0 to 0. Modify the spanning-tree port-priority on SW1 f1/1 to 0 and f1/0 to 16. configurable in increments of 16. If all LAN ports have the same priority value. The possible priority range is 0 through 240 (default 128)." . STP considers port priority when selecting a LAN port to put into the forwarding state.com 72 .

The switch priority value is zero. Any Time." . Why would the switch be considered as a root bridge? A.1_9_ea1/configur ation/guide/swstp.19 and all ports are forwarding. C. it has the lowest priority value for VLAN 1. "Pass Any Exam.cisco.Cisco 300-115 Exam Reference: http://www.com 73 . The bridge priority is 1 and all ports are forwarding.com/en/US/docs/switches/lan/catalyst2950/software/release/12. B. The switch priority for VLAN 1 and the macro specifies “This Bridge is the root”. The bridge priority is 128. D.actualtests.www.html#wp1105354 QUESTION NO: 90 Refer to the exhibit.

which option will be the new root port for VLAN 10? A.html#wp1020666 QUESTION NO: 91 Refer to the exhibit. Any Time. interface f0/13 B. Considering the default cost of upstream bridges to the root bridge is equal.com 74 . Reference: http://www.Cisco 300-115 Exam Answer: D Explanation: For priority. the more likely the switch will be chosen as the root switch.com/en/US/docs/switches/lan/catalyst2950/software/release/12.cisco. the default is 32768." .1_9_ea1/configur ation/guide/swstp. interface f0/15 D. All ports are members of VLAN 10. the range is 0 to 61440 in increments of 4096. interface f0/14 C.www. The lower the number. 71sername71e f0/21 "Pass Any Exam.actualtests.

com 75 . Which Layer 2 enhancement can be used to eliminate this delay? A. 3.Blocking – A port that would cause a switching loop.Cisco 300-115 Exam Answer: D Explanation: Root Port election on each bridge Each (non-Root) bridge has exactly one Root Port. which represents the best path to the Root Bridge. B. Configure spanning-tree portfast. bypassing the listening and learning states.com/extreme/topics/802_1d_spanning_tree_election_rules QUESTION NO: 92 A network engineer is trying to deploy a PC on a network. Configure port to duplex full and speed 1000. 2." . normal operation. C. Reference: https://community. Configure port duplex and speed to auto negotiation. STP PortFast causes a Layer 2 LAN interface configured as an access port to enter the forwarding state immediately.extremenetworks. fa0/21 has t–e lowest cost. Any Time. BPDU data is still received in blocking state.www.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. it takes 30 to 60 seconds for the PC to see any activity on the network interface card. With the initial version of spanning tree.Listening – The switch processes BPDUs and awaits possible new information that would cause it to return to the blocking state. "Pass Any Exam. These steps are outlined as follows.Forwarding – A port receiving and sending data. The engineer observes that when the PC is connected to the network. In this case. so it will be th– root port. Configure no switchport. 1. each port goes through 4 states to ensure that there are no physical loops in the layer 2 broadcast domain. STP still monitors incoming BPDUs that would indicate it should return to the blocking state to prevent a loop. this process could take from 30-60 seconds. Answer: C Explanation: When first powered on.actualtests. 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. D.

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

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

The VSS transitions to the dual active recovery mode. Answer: D Explanation: Q.cisco. 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. 4 B. Any Time.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74b . D. B. 6 C. and only the new active virtual switch continues to forward traffic. 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. If for some rare reason all "Pass Any Exam." . Reference: http://www. Both virtual switch members cease to forward traffic.actualtests. 8 D.html QUESTION NO: 97 Which statement describes what happens if all VSL connections between the virtual switch members are lost? A.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. and both virtual switch members continue to forward traffic independently.www. C. The virtual switch members reload. The VSS transitions to the dual active recovery mode. What happens if all VSL connections between the virtual switch members are lost? A.com 78 .

B. The new active virtual switch continues to forward traffic on all links. D. 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 .com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74b .cisco. The new active virtual switch continues to forward traffic on all links.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. C.Cisco 300-115 Exam VSL connections are lost between the virtual switch members leaving both the virtual switch members up.cisco. The switch shuts down and waits for the VSL link to be restored before sending traffic. all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member.2(33)SXI) In the dual active recovery mode. All interfaces are shut down in the formerly active virtual switch member. The VSS detects which system was last in active state and shuts down the other switch. The switch continues to forward traffic out all links and enables spanning tree on VSL link and all other links to prevent loops.html QUESTION NO: 98 Which statement describes what happens when a switch enters dual active recovery mode? A. but the new active virtual switch forwards traffic on all links. Answer: B Explanation: In the dual active recovery mode.html "Pass Any Exam." . Any Time. Reference: http://www. Reference: http://www. the VSS will transition to the dual active recovery mode.www.actualtests.

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

com 81 .www.actualtests. with SwitchA controlling activation. This mode should be done with a nonproprietary protocol." . 22 and 23 should tagged when traversing the trunk link. 21. 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.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.21-23 channel-protocol lacp channel-group 1 mode passive switchport mode trunk ! "Pass Any Exam. • Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link.

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 82 .www. Any Time." .actualtests.Cisco 300-115 Exam interface FastEthernet0/4 switchport trunk allowed vlan 1.

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.www.255.0 ! 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 1.11 255." .Cisco 300-115 Exam ! interface Port-channel 1 switchport mode trunk switchport trunk encapsulation dot1q spanning-tree allowed vlans 1.com 83 .21-23 channel-protocol lacp channel-group 1 mode active switchport mode trunk ! interface FastEthernet0/4 switchport trunk allowed vlan 1.1.255. Any Time.21-23 ! interface Vlan1 ip address 192.actualtests.

actualtests.www.200. You need to configure SwitchC so that Hosts H1 and H2 can successfully ping the server S1.64/27 "Pass Any Exam.168.200.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 192.32/27 – 190. 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: – 10.10.250.250. RouterC is correctly configured.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. Company policies forbid the use of static or default routing.1. You do not have access to RouteC. Routed interfaces should use the lowest host on a subnet when possible.com 84 . No trunking has been configured on RouterC. Any Time. Also SwitchC needs to be able to ping server S1. which has a partial configuration and has been attached to RouterC as shown in the topology diagram.10.0/24 – 190." .

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

www. Trunking must be established between RouterC and SwitchC.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. SwitchC should be configured as a Layer 3 switch (which supports ip routing function as a router). No trunking requires.actualtests.com 86 . Any Time." . + Only use SwitchC for interVLAN routing without using RouterC. 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.

224 SwitchC(config-if)# no shutdown SwitchC(config-if)# int vlan 3 SwitchC(config-if)# ip address 190.200.com 87 . In order to complete the lab.0. in fact it is not necessary because the network 190.0.200. also don’t modify/delete any port just do the above configuration.32 0.200.2 255.0 0. the simulator does not let you assign IP address on Gi0/1 interface. gi0/11 interfaces were configured as access ports so we don’t need to configure them in this sim.10." .0 ->RouterC has used IP 10. SwitchC(config-if)# no shutdown SwitchC(config-if)# exit SwitchC(config)# int vlan 2 SwitchC(config-if)# ip address 190.250.255. We should check the default gateways on H1 & H2. 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.10.64 0.255.Cisco 300-115 Exam switch with SVIs for interVLAN routing.255. SwitchC# configure terminal SwitchC(config)# int gi0/1 SwitchC(config-if)#no switchport -> without using this command.10.www.0/16 is not used anywhere else in this topology.255. SwitchC(config-if)# ip address 10.250.10.0.33 Host2: + Default gateway: 190.10. you should expect the ping to SERVER to succeed from the MLS.0.31 SwitchC(config-router)# network 190. and from the PCs as well.250.255.250.200. Click on H1 and H2 and type the “ipconfig” command to get their default gateways.33 255. Also some reports said the “no auto-summary” command can’t be used in the simulator.200.actualtests.65 255.250.65 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. If you use wrong AS number. so you will not miss within it in the exam.250.0. no neighbor "Pass Any Exam.200.0.0.224 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 10.31 NOTE: THE ROUTER IS CORRECTLY CONFIGURED.255.10.200.255 SwitchC(config-router)# network 190. Answer: \>ipconfig We will get the default gateways as follows: Host1: + Default gateway: 190. Any Time.1 so this is the lowest usable IP address.

0.200.0. But in the exam the sim is just a flash based simulator so we should use two above commands.0.0 because it is the nature of distance vector routing protocol like EIGRP: only major networks need to be advertised. Any Time. only the summarized network 190.com 88 . we can use “show run” command to verify.actualtests.www.0. we are pretty sure instead of using two commands “network 190.Cisco 300-115 Exam relationship is formed between RouterC and SwitchC. just for sure.200.250.250.31 and “network 190. "Pass Any Exam.32 0. QUESTION NO: 101 You have been asked to install and configure a new switch in a customer network. In fact.0 is shown.200.64 0." .200. But after finishing the configuration. even without “no auto-summary” command the network still works correctly. Use the console access to the existing and new switches to configure and verify correct device configuration.0.31 we can use one simple command “network 190.0.

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

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

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

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

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

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

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

" . Use the console access to the existing and new switches to configure and verify correct device configuration. "Pass Any Exam. Any Time.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 .actualtests.

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

Configure VLAN 500 & VLAN 600 on both SW1 & SW2 B.Cisco 300-115 Exam You are adding new VLANs. 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." .SW2 and SW4 "Pass Any Exam. Configure VLAN 500 and VLAN 600 on SW1 . Configure VLAN 500 and VLAN 600 on SW1 only C. Configure VLAN 500 and VLAN 600 on SW2 only D. Which configuration step is valid? A.actualtests.www. Any Time.com 98 .

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

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

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

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

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

auditing Answer: A Explanation: "Pass Any Exam. Define and configure the DHCP server. the trust state of all interfaces is untrusted. Use IP Source Guard to protect the DHCP binding table entries from being lost upon rebooting. Enable DHCP snooping globally. Enable DHCP snooping on at least one VLAN. The feature is not active until you complete this step. 2.cisco. Reference: http://www. A DHCP snooping database agent should be configured. 3.2SX/configuration/guide/snood hcp. Configure the DHCP snooping database agent. authorization B. This step ensures that database entries are restored after a restart or switchover. Ensure that DHCP server is connected through a trusted interface. 5. Apply ip dhcp snooping trust on all interfaces with dynamic addresses. B. By default. DHCP snooping is inactive on all VLANs." . Enable DHCP snooping for all VLANs that are associated with the switch.www.com 104 . 4. D. accounting D. Any Time.Cisco 300-115 Exam database. C.html#wp1090479 QUESTION NO: 106 Which portion of AAA looks at what a user has access to? A.com/en/US/docs/switches/lan/catalyst6500/ios/12.actualtests. What is the solution to avoid the snooping database from being rebuilt after every device reboot? A. Answer: A Explanation: Minimum DHCP Snooping Configuration The minimum configuration steps for the DHCP snooping feature are as follows: 1. Disable Option 82 for DHCP data insertion. authentication C. E. By default.

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

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

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

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

The keywords have these meanings: • For level. multicast.com 109 . In which three ways does this command impact the traffic? (Choose three. including access and trunk ports. The switch resumes forwarding broadcasts when they are below 65% of bandwidth. C. specify the rising threshold level for broadcast.cisco. F. E.Cisco 300-115 Exam interface. D. A port access control list (ACL) is applied to the interface.actualtests.D.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/122_25_see/configuration/guide/3550SCG/swdhcp82.) A. or unicast traffic as a percentage (up to two decimal places) of the bandwidth. SNMP traps are sent by default when broadcast traffic reaches 65% of the lower-level threshold. or unicast storm control. Any Time. multicast. You can configure IP source guard with source IP address filtering or with source IP and MAC address filtering. its associated MAC address.00.F Explanation: storm-control {broadcast | multicast | unicast} level {level [level-low] | pps pps [pps-low]} Configure broadcast. The port ACL allows only IP traffic with a source IP address in the IP source binding table and denies all other traffic. The switch drops broadcasts when they reach 75% of bandwidth. The range is 0. By default. The port blocks traffic when the rising threshold is reached. except for DHCP packets allowed by DHCP snooping." . Multicast traffic is dropped at 65% and broadcast traffic is dropped at 75% of the total interface bandwidth. Only broadcast traffic is limited by this particular storm control configuration. An entry in this table has an IP address. IP source guard is supported only on Layer 2 ports. • "Pass Any Exam. The IP source binding table has bindings that are learned by DHCP snooping or are manually configured (static IP source bindings). B. The switchport is disabled when unicast traffic reaches 75% of the total interface bandwidth.00 to 100. and its associated VLAN number. Answer: C.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. Reference: http://www. storm control is disabled. The switch uses the IP source binding table only when IP source guard is enabled.www.

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

1540 Dynamic 2 FastEthernet0/5 0010. integrated routing and bridging E. switch# show ip arp inspection E.---.-------------------0010.com 111 .1545 Dynamic 2 FastEthernet0/5 QUESTION NO: 116 While troubleshooting a network outage. a network engineer discovered an unusually high level of broadcast traffic coming from one of the switch interfaces. SDM routing C. switch# show mac address-table B.-----------." . Which option decreases consumption of bandwidth used by broadcast traffic? A. Dynamic ARP Inspection "Pass Any Exam. switch# show port-security C. Cisco IOS parser D. Which two commands help trace this PC when the MAC address is known? (Choose two.0de0. switch# show ip verify source D.www. including the switch port that the particular host is using. storm control B. 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 ------------------.e289 Dynamic 1 FastEthernet0/1 0010. switch# show mac address-table address <mac address> Answer: A.actualtests.7b00.) 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. Any Time.E Explanation: These two commands will show the MAC address table.7b00.

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

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

Reference: http://www. Because the switch acts as the proxy.com/c/en/us/td/docs/switches/lan/catalyst2940/software/release/121_19_ea1/configuration/guide/2940scg_1/sw8021x. none required B. RADIUS using VSA Answer: A Explanation: With 802.cisco. login authentication default "Pass Any Exam. no username with password linepass D. Which login credentials are required when connecting to the console port in this output? A.actualtests.www. 115sernamee cisco with password cisco C." .pdf QUESTION NO: 120 Refer to the exhibit.Cisco 300-115 Exam C.com 114 . Any Time. the authentication service is transparent to the client. RADIUS with CoA D. the authentication server—performs the actual authentication of the client. 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. The Remote Authentication Dial-In User Service (RADIUS) security system with Extensible Authentication Protocol (EAP) extensions is the only supported authentication server.1x.

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

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

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

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

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.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/C LIConfigurationGuide/PrivateVLANs. primary VLAN C. •Isolated VLAN —An isolated VLAN is a secondary VLAN that carries unidirectional traffic upstream from the hosts toward the promiscuous ports. You can configure multiple community VLANs in a private VLAN domain.cisco. promiscuous VLAN Answer: A Explanation: Understanding Primary. Each isolated VLAN can have several isolated ports.www.actualtests. dynamic ARP database "Pass Any Exam.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 to other promiscuous ports." . but these ports cannot communicate with ports in any other community or isolated VLAN in the private VLAN. community VLAN D. Any Time. isolated VLAN B. all the traffic remains isolated within each one.com 119 . Isolated. The ports within one community can communicate. DHCP snooping database B. and the traffic from each isolated port also remains completely separate. You can configure multiple isolated VLANs in a private VLAN domain. Reference: http://www. both isolated and community. •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. 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.

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

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

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

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

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

Corporate polices do not allow layer 3 functionality to be enabled on the switches. isolated port C. DSW1 and ASW1. Authentication is to be done via a Radius server: • Radius server host: 172. promiscuous port B.wikipedia. You must "Pass Any Exam. Host port further divides in two types – Isolated port (I-Port) and Community port (C-port). Reference: http://en. You have been tasked with implementing the above access control as a pre-condition to installing the servers.120.40. access port Answer: A Explanation: There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches.0/24.46 • Radius key: rad123 • Authentication should be implemented as close to the host as possible. • Packets from devices in any other address range should be dropped on VLAN 20. • Devices on VLAN 20 are restricted to the subnet of 172.40. The Radius server and application servers will be installed at a future date. The topology diagram indicates their layer 2 mapping. For security reasons.120.0/24 should be allowed on VLAN 20. • Packets from devices in the subnet of 172.www." .40.120.org/wiki/Private_VLAN QUESTION NO: 136 CORRECT TEXT SWITCH. which type of port must you configure the gateway router port as? A.com 125 . community port D.actualtests. Any Time.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. • Filtering should be implemented as close to the serverfarm as possible.

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

120.40. Any Time.www.actualtests.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.0.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 172.39.0.0 0.com 127 .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 172.120." .

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

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

. VRRP D. . .. 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 .1 active router. ..1 or more listening routers.www.com 130 .actualtests.. HSRP C.up to 1024 virtual routers (GLBP groups) per physical interface.1 master router.1 or more backup routers.up to 4 AVF routers on the group (Active Virtual Forwarder) passing traffic.Can use real router ip address.. the one with highest priority become master.Cisco 300-115 Exam QUESTION NO: 140 Which First Hop Redundancy Protocol is an IEEE Standard? A." . 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.Use virtual ip address. Any Time. if not. GLBP B. .Use virtual ip address.1 AVG (Active Virtual Gateway)..1 standby router.

www.0. .Weighted algorithm.Cisco 300-115 Exam yes yes Preempt yes yes yes Timer adjustments yes yes yes Traffic type 224.(generally through DHCP) Clients are transparently updated with virtual MAC according to load-balancing algorithm through ARP requesting a unique virtual gateway.Host-dependent algorithm.Multiple HSRP group per interface/SVI/routed int.0.2 – udp 1985 (version1)224. .0.0.(generally through DHCP) Requires appropriate distribution of Virtual GW IP per Clients for optimal load-balancing.actualtests. Requires appropriate distribution of Virtual GW IP per Clients for optimal load-balancing.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 .102-udp 1985 (version2) 224. Any Time.wordpress.18 – IP 112 224." .0.0..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.0.0. Reference: http://cciethebeginning.Round-Robin algorithm (default). Load-balancing oriented.Multiple VRRP group per interface/SVI/routed int.com 131 .

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

These gateways are known as active virtual forwarders (AVFs) for their virtual MAC address.html#wp1039651 QUESTION NO: 143 Which gateway role is responsible for answering ARP requests for the virtual IP address in GLBP? A. Reference: http://www. Other group members provide backup for the AVG in the event that the AVG becomes unavailable.www.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp. Reference: http://www. The AVG assigns a virtual MAC address to each member of the GLBP group.cisco. Load sharing is achieved by the AVG replying to the ARP requests with different virtual MAC addresses. 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." .actualtests. active virtual gateway D. The AVG is responsible for answering Address Resolution Protocol (ARP) requests for the virtual IP address.html QUESTION NO: 144 Which VRRP router is responsible for forwarding packets that are sent to the IP addresses of the virtual router? A. active virtual forwarder B.com 133 . virtual router master B.cisco.Cisco 300-115 Exam virtual MAC address is referred to as a secondary virtual forwarder. Any Time. active virtual router C.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp. 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 active D. It consists of a Virtual Router Identifier and a set of associated IP address(es) across a common LAN. etc.txt "Pass Any Exam. when up. A VRRP Router may backup one or more virtual routers. Reference: http://www. IP Address Owner The VRRP router that has the virtual router's IP address(es) as real interface address(es’. VRRP advertisements are always sent using the primary IP address as the source of the IP packet. then it will always become the Master. Virtual Router An abstract object managed by VRRP that acts as a default router for hosts on a shared LAN. will respond to packets addressed to one of these IP addresses for ICMP pings.actualtests." . Note that if the IP address owner is available.com 134 .Cisco 300-115 Exam C. virtual router standby Answer: A Explanation: VRRP Definitions VRRP Router A router running the Virtual Router Redundancy Protocol. TCP connections. Any Time.org/rfc/rfc3768. One possible selection algorithm is to always select the first address.ietf. 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. Primary IP Address An IP address selected from the set of real interface addresses. and answering ARP requests for these IP addresses. This is the router that.www. It may participate in one or more virtual routers.

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

In order to resolve this issue. Unavailable GLBP active forwarder B. 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.www. HSRP configured on same interface as GLBP D.255.102 and User Datagram Protocol (UDP) port 3222 (source and destination). Note: GLBP members communicate between each other through hello messages sent every 3 seconds to the multicast address 224.Cisco 300-115 Exam QUESTION NO: 147 Refer to the exhibit. then it indicates that this router is receiving its own hello packets sent.0. %GLBP-4-DUPADDR: Duplicate address The error message indicates a possible layer2 loop and STP configuration issues. permit the Multicast address by permit 224.0. If the interface MAC address is different from the one reported in the error message.255. Verify the spanning-tree topology and check if there is any layer2 loop.shtml#dr "Pass Any Exam. then some other device with a MAC address reports this error message." . issue the show interface command to verify the MAC address of the interface.0.com 136 . When configuring the multicast boundary command. Layer 2 loop Answer: D Explanation: This section provides information you can use to troubleshoot your configuration.255. Any Time.cisco. Incorrect GLBP IP address C.0 15.actualtests.0. Reference: http://www.com/en/US/products/hw/switches/ps708/products_configuration_example09186a 00807d2520.

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

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

is a medium sized company. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. "Pass Any Exam.actualtests.Cisco 300-115 Exam (priority of Vlan102 on DS2). QUESTION NO: 150 Ferris Plastics.www. Currently all interfaces are up. Any Time. 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. Inc. with an enterprise network (access. Using the running configurations and show commands.com 142 . Troubleshooting has identified several issues. you have been asked to investigate and respond to the following question.

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

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

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

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

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

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

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

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

"Pass Any Exam.com 151 ." . 90 B.Cisco 300-115 Exam If GigabitEthemet1/0/1 on DSW2 is shutdown. 200 Answer: A Explanation: Explanation As seen below. 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.www.actualtests. the current priority for VLAN 105 is 100. 100 C. 150 D. Any Time. what will be the resulting priority value of the VLAN 105 HSRP group on router DSW2? A.

com 152 .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. They have questions about how these two devices will perform in the event of a device failure. "Pass Any Exam." .www.actualtests. Any Time.

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

Any Time. so all outgoing traffic will be forwarded to R1." . we see that R1 is the active standby router for the Ethernet 0/0 link. "Pass Any Exam.Cisco 300-115 Exam Answer: D Explanation: Based on the following output. They have questions about how these two devices will perform in the event of a device failure.www. 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 .actualtests.

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

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

the standby 1 track decrement command will lower the priority from 130 to 90. 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.actualtests. However. Any Time. when the Ethernet 0/0 interface goes down. when it comes back up.www.Cisco 300-115 Exam Here. They have questions about how these two devices will perform in the event of a device failure. "Pass Any Exam. it will then increment it by 40 back to 130 for HSRP group 1.com 157 ." .

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

The HSRP timers mismatch E.www. Any Time. we see that authentication is configured on R2." . but not on R1: "Pass Any Exam. The HSRP group number mismatch B. The HSRP group authentication is misconfigured C.actualtests.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. The HSRP Hello packets are blocked D. The HSRP group priorities are different Answer: B Explanation: Based on the configuration output.com 159 .

"Pass Any Exam.Cisco 300-115 Exam This can be further verified by issuing the “show standby” command on each router. They have questions about how these two devices will perform in the event of a device failure. Any Time.com 160 .actualtests." . 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.www.

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

" .0010 Answer: B Explanation: Issuing the “show standby” command on either router shows us that the virtual MAC used by HSRP group 1 is 4000.0000.0000.0c07.ac01 E.0c07.com 162 .0000.actualtests. 4000.0010 as shown below: "Pass Any Exam.Cisco 300-115 Exam What is the virtual mac-address of HSRP group 1? A.www.ac02 F. 0000.ac02 B. 0000. Any Time.0010 C. 4000.ac01 D.0000.0c07. 0000. 4000.

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

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

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

Cisco 300-115 Exam QUESTION NO: 164 Refer to the exhibit. reload B. C. B. which action must be performed for the configuration to take effect? A. Configure a SPAN session to monitor the received traffic on interface g0/5 only for VLAN 3.actualtests. shutdown C.www. What is the result of the SPAN configuration on a Cisco switch? A. write memory D. Any Time. 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. 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.com 166 . Configure a SPAN session to monitor the received traffic on interface g0/5 for all VLANs except VLAN 3. D. Configure a SPAN session to monitor the received traffic on interface g0/4 for all VLANs except VLAN 3." .

com 167 . BackboneFast C. A sticky MAC address can be a unicast or multicast address. BPDU guard Answer: D Explanation: QUESTION NO: 168 Refer to the exhibit. A sticky MAC address ages out of the MAC address table after 600 seconds. 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. C. BPDU filtering B.Cisco 300-115 Exam A.actualtests. Any Time. A sticky MAC address is lost when the switch reboots. B. A sticky MAC address is retained when the switch reboots." . D.www. "Pass Any Exam. EtherChannel D.

" . DSW1(config)#cdp timer 90 B. B. DSW1(config-if)#cdp holdtime 30 F. They go down until they are reassigned to a VLAN. They remain up. and then the VLAN is deleted. DSW1(config-if)#cdp timer 60 Answer: C Explanation: QUESTION NO: 169 Interfaces are assigned to a VLAN. Which state are these interfaces in after the VLAN is deleted? A. DSW1(config-if)#cdp holdtime 60 C. but they are reassigned to the default VLAN. "Pass Any Exam. Any Time. DSW1(config)#cdp holdtime 90 E.com 168 .www.actualtests. DSW1(config)#cdp timer 30 D.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.

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

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

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

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

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

routing information Answer: C Explanation: "Pass Any Exam.www. RSPAN session 1 monitors activity on VLAN 50 of a remote switch. VLAN database B. DHCP snooping database C.actualtests. D. 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." . spanning trees D.com 174 . RSPAN session 1 is incompletely configured for monitoring. SPAN session 2 monitors all traffic entering and exiting port FastEthernet 0/15.Cisco 300-115 Exam Which statement about the SPAN and RSPAN configuration on SW1 is true? A. SPAN session 2 only monitors egress traffic exiting port FastEthernet 0/14. C. B. Any Time.

1000 bindings B.com 175 . Any Time. on C. what is the state of port security on a switch? A. 2000 bindings C. Layer 1 B. Layer 3 D.www. off D. 5000 bindings D. disabled B. Layer 2 C.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.actualtests. 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. learning Answer: A Explanation: QUESTION NO: 185 "Pass Any Exam." .

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

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

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

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

disable STP globally C. adjust STP priority to the maximum value B. apply root guard to all outgoing neighbor interfaces D.www.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.actualtests." .com 180 . enable MSTP and use a different revision number than all other switches Answer: A "Pass Any Exam. Any Time. What action will accomplish this task? A.