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

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

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

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

in which the interface starts negotiations with other interfaces by sending PAgP packets. for Layer 2 EtherChannels.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. Reference: http://www.cisco. in which the interface responds to LACP packets that it receives. This setting minimizes the transmission of LACP packets. in which the interface starts negotiations with other interfaces by sending 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.actualtests.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/121_13_ea1/configuration/guide/3550scg/swethchl. in which the interface responds to PAgP packets it receives but does not start PAgP packet negotiation." . With the on mode. This setting minimizes the transmission of PAgP packets. •An interface in the auto mode can form an EtherChannel with another interface in the desirable mode. Interfaces can form an EtherChannel when they are in different PAgP modes as long as the modes are compatible. trunking state and VLAN numbers. but does not start LACP packet negotiation. on Forces the interface into an EtherChannel without PAgP or LACP. auto Places an interface into a passive negotiating state. a usable EtherChannel exists only when an interface group in the on mode is connected to another interface group in the on mode. Any Time. passive Places an interface into a passive negotiating state. 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.html "Pass Any Exam.www. desirable Places an interface into an active negotiating state. 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. For example: •An interface in the desirable mode can form an EtherChannel with another interface that is in the desirable or auto mode.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

com/CiscoSB/GetArticle. • CDP Version 2 — This is the most recent version of CDP which has enhanced features such as rapid reporting mechanism. It allows you to track instances even if the native VLAN ID or port duplex states do not match between connecting devices. VTP pruning B. trunk allowed VLANs D.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." .www. This version is mainly used for backward compatibility. Reference: http://www.com 30 . This is the default version on all switches. VLAN access-list E. L2P tunneling Answer: C Explanation: By default.actualtests.xml&pid=2&converted=0 QUESTION NO: 33 Which technique allows specific VLANs to be strictly permitted by the administrator? A.aspx?docid=0ed03cbac49b446ab390a657917d817c_Ci sco_Discovery_Protocol_CDP__Properties_Settings_on_Sx500_S.cisco.1_13_ea1/config uration/guide/swvlan. Any Time. To restrict the traffic a trunk carries. Reference: http://sbkb. you can remove VLANs from the allowed list.html QUESTION NO: 34 "Pass Any Exam. All VLAN IDs. a trunk port sends traffic to and receives traffic from all VLANs. 1 to 4094. preventing traffic from those VLANs from passing over the trunk. which is used to track down errors and minimize costly downtime.com/en/US/docs/switches/lan/catalyst3550/software/release/12. use the “switchport trunk allowed vlan remove vlan-list” interface configuration command to remove specific VLANs from the allowed list. However. are allowed on each trunk.cisco. transparent bridging C.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

UDLD puts the affected port into the errdisabled state and alerts the user. every 60 seconds. 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. 120 seconds D. They also listen to messages to learn when interfaces on other devices are up or go down.actualtests. 30 seconds B.com/en/US/docs/ios-xml/ios/cdp/configuration/15-mt/nm-cdpdiscover. UDLD detects the existence of unidirectional links. and network-independent protocol that networking applications use to learn about nearby. Reference: http://www. Advertisements contain time-to-live information. UDLD can operate in either normal or aggressive mode. by default.cisco.www.html QUESTION NO: 62 "Pass Any Exam. Any Time. directly connected devices." .ht ml QUESTION NO: 61 What is the default interval at which Cisco devices send Cisco Discovery Protocol advertisements? A. Devices discover each other by listening at that address.com 50 . Reference: http://www.cisco. Advertisements supported and configured in Cisco software are sent.Cisco 300-115 Exam devices and ports that support UDLD. Cisco Discovery Protocol is enabled by default. When a unidirectional link is detected.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/udld. which indicates the length of time a receiving device should hold Cisco Discovery Protocol information before discarding it. 300 seconds Answer: B Explanation: Cisco Discovery Protocol is a Layer 2. 60 seconds C. media-independent.

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

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

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

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

Use the show vlan privileged EXEC command to see if the VLAN is present (listed in the display). Reference: http://www. within the Ethernet payload C.actualtests.com 55 .1q header found? A. port-security C. within the Ethernet header B.www. portfast B.com/en/US/docs/switches/lan/catalyst2950/software/release/12. within the Ethernet source MAC address Answer: A Explanation: Frame format Insertion of 802.Cisco 300-115 Exam A." . the Port Fast feature is not automatically disabled.cisco. storm control Answer: A Explanation: Voice VLAN Configuration Guidelines •You should configure voice VLAN on switch access ports. When you disable voice VLAN. within the Ethernet FCS D.1_22_ea11x/conf iguration/guide/swvoip.1Q tag in an Ethernet frame "Pass Any Exam.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. •The voice VLAN should be present and active on the switch for the IP phone to correctly communicate on the voice VLAN. Any Time. spanning tree D.

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

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

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

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

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

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

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

D. Configure G0/1 as half duplex and G0/2 as full duplex. auto. B. The port priority can be configured automatically or through the CLI. Only the combinations auto-desirable.com 63 . G0/2. LACP traffic goes through G0/4 because it is the highest interface ID. The default is 32768.actualtests.com/c/en/us/td/docs/ios/12_2sb/feature/guide/gigeth. C. Configure LACP port-priority on G0/1 to 1.1Q trunking.Cisco 300-115 Exam Answer: A Explanation: In 802. and on-on allow the formation of a channel. A VLAN tag adds 4 bytes to the frame. desirabledesirable. Reference: http://www. QUESTION NO: 80 A network engineer configured a fault-tolerance link on Gigabit Ethernet links G0/1. Any Time. "Pass Any Exam.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. the other two bytes for tag control information (TCI). The higher the number. desirable. the lower the priority. Which action allows interface G0/1 to always actively forward traffic in the port-channel? A. LACP uses the port priority with the port number to form the port identifier. all VLAN packets are tagged on the trunk link. G0/3. Answer: B Explanation: A LACP port priority is configured on each port using LACP. and on. except the native VLAN.cisco. 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. Configure LACP port-priority on G0/1 to 65535. Two bytes are used for the tag protocol identifier (TPID). The valid range is from 1 to 65535. and G0/4 between two switches using Ethernet port-channel." . PagP modes are off.

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

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

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

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

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

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

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

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

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

cisco. it has the lowest priority value for VLAN 1.Cisco 300-115 Exam Reference: http://www.html#wp1105354 QUESTION NO: 90 Refer to the exhibit. Why would the switch be considered as a root bridge? A. The switch priority for VLAN 1 and the macro specifies “This Bridge is the root”.com 73 . D.www. C." . "Pass Any Exam.19 and all ports are forwarding. Any Time. The bridge priority is 1 and all ports are forwarding. The switch priority value is zero. B.actualtests.com/en/US/docs/switches/lan/catalyst2950/software/release/12. The bridge priority is 128.1_9_ea1/configur ation/guide/swstp.

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

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

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

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

com 78 . What happens if all VSL connections between the virtual switch members are lost? A.actualtests. VSLs can be configured with up to eight links between the two switches across any combination of line cards or supervisor ports to provide a high level of redundancy. and both virtual switch members continue to forward traffic independently. Answer: D Explanation: Q. and only the new active virtual switch continues to forward traffic. Reference: http://www. 6 C.html QUESTION NO: 97 Which statement describes what happens if all VSL connections between the virtual switch members are lost? A. Both virtual switch members cease to forward traffic. B." . C. The VSS transitions to the dual active recovery mode. The VSS transitions to the dual active recovery mode. If for some rare reason all "Pass Any Exam.cisco. Any Time.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. 8 D. 4 B. The virtual switch members reload. 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.www. D.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74b .

the VSS will transition to the dual active recovery mode. The switch continues to forward traffic out all links and enables spanning tree on VSL link and all other links to prevent loops.actualtests. Reference: http://www. but the new active virtual switch forwards traffic on all links.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74b . C. Any Time.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74b . The switch shuts down and waits for the VSL link to be restored before sending traffic. 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. B. All interfaces are shut down in the formerly active virtual switch member." . The new active virtual switch continues to forward traffic on all links. D.html "Pass Any Exam.cisco.Cisco 300-115 Exam VSL connections are lost between the virtual switch members leaving both the virtual switch members up.2(33)SXI) In the dual active recovery mode.cisco.html QUESTION NO: 98 Which statement describes what happens when a switch enters dual active recovery mode? A.www. Answer: B Explanation: In the dual active recovery mode.com 79 . all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member. all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member. The new active virtual switch continues to forward traffic on all links. Reference: http://www. The VSS detects which system was last in active state and shuts down the other switch.

• SwitchA needs to be the root switch for vlans 11.www. SwitchA and SwitchB use Cisco as the enable password. All other vlans should be left are their default values.will support two servers attached to fa0/13 and fa0/14 • Vlan 23 o Name: Engineering . SwitchA is currently configured correctly. 13.com 80 . but will need to be modified to support the addition of SwitchB.168. • 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. • SwitchB VTP mode needs to be the same as SwitchA.11/24 "Pass Any Exam. You have been tasked with competing the needed configuring of SwitchA and SwitchB. SwitchB has a minimal configuration. 21. 22 and 23.actualtests. Any Time. Configuration Requirements for SwitchA The VTP and STP configuration modes on SwitchA should not be modified.will support two servers attached to fa0/9 and fa0/10 • Vlan 22 .Name: Sales . RouterA is currently configured correctly and is providing the routing function for devices on SwitchA and SwitchB. They have just added a new switch (SwitchB) to the existing network as shown in the topology diagram.Cisco 300-115 Exam QUESTION NO: 99 CORRECT TEXT Scenario: You work for SWITCH. 12.1.Name: Marketing .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." . Configuration Requirements for SwitchB • Vlan 21 .com.

21. Any Time. This mode should be done with a nonproprietary protocol. • Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link. 22 and 23 should tagged when traversing the trunk link.com 81 .Cisco 300-115 Exam Inter-switch Connectivity Configuration Requirements • For operational and security reasons trunking should be unconditional and Vlans 1. 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.www.actualtests." .21-23 channel-protocol lacp channel-group 1 mode passive switchport mode trunk ! "Pass Any Exam. • 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. with SwitchA controlling activation.

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

255.255.21-23 channel-protocol lacp channel-group 1 mode active switchport mode trunk ! interface FastEthernet0/21 switchport access vlan 21 switchport mode access ! interface FastEthernet0/22 switchport access vlan 22 switchport mode access ! interface FastEthernet0/23 "Pass Any Exam.actualtests. Any Time." .Cisco 300-115 Exam ! interface Port-channel 1 switchport mode trunk switchport trunk encapsulation dot1q spanning-tree allowed vlans 1.www.11 255.21-23 channel-protocol lacp channel-group 1 mode active switchport mode trunk ! interface FastEthernet0/4 switchport trunk allowed vlan 1.com 83 .1.168.21-23 ! interface Vlan1 ip address 192.0 ! 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.

10.250. Routed interfaces should use the lowest host on a subnet when possible.actualtests. Company policies forbid the use of static or default routing.www.250.com 84 .10. which has a partial configuration and has been attached to RouterC as shown in the topology diagram.32/27 – 190. You need to configure SwitchC so that Hosts H1 and H2 can successfully ping the server S1.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 192.1 ! ! End QUESTION NO: 100 CORRECT TEXT You have been tasked with configuring multilayer SwitchC.1. No trunking has been configured on RouterC. Also SwitchC needs to be able to ping server S1." . All routes must be learned via EIGRP 65010 routing protocol. Due to administrative restrictions and requirements you should not add/delete vlans or create trunk links. Any Time. RouterC is correctly configured.200.0/24 – 190.200. You do not have access to RouteC.168. The following subnets are available to implement this solution: – 10.64/27 "Pass Any Exam.

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

+ Only use SwitchC for interVLAN routing without using RouterC." . Trunking must be established between RouterC and SwitchC. Any Time.www.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).actualtests.com 86 . 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. No trunking requires.

255.200. Answer: ###BOT_TEXT###gt;ipconfig We will get the default gateways as follows: Host1: + Default gateway: 190.10.10.33 255.32 0.31 NOTE: THE ROUTER IS CORRECTLY CONFIGURED.255. In order to complete the lab.0.250. If you use wrong AS number.64 0. so you will not miss within it in the exam. the simulator does not let you assign IP address on Gi0/1 interface.250.200.10.0.10." .0.10. SwitchC(config-if)# no shutdown SwitchC(config-if)# exit SwitchC(config)# int vlan 2 SwitchC(config-if)# ip address 190. 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. no neighbor "Pass Any Exam.1 so this is the lowest usable IP address. Any Time. We should check the default gateways on H1 & H2.250. Click on H1 and H2 and type the “ipconfig” command to get their default gateways.33 Host2: + Default gateway: 190.0 ->RouterC has used IP 10.255.0.65 255.255.10.255. SwitchC(config-if)# ip address 10.250.255. you should expect the ping to SERVER to succeed from the MLS.250.Cisco 300-115 Exam switch with SVIs for interVLAN routing.2 255.200.224 SwitchC(config-if)# no shutdown SwitchC(config-if)# int vlan 3 SwitchC(config-if)# ip address 190. SwitchC# configure terminal SwitchC(config)# int gi0/1 SwitchC(config-if)#no switchport -> without using this command.200. also don’t modify/delete any port just do the above configuration.0.200.65 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. Also some reports said the “no auto-summary” command can’t be used in the simulator.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 10.255 SwitchC(config-router)# network 190.www.200.0.0.com 87 .0/16 is not used anywhere else in this topology. and from the PCs as well.0 0.200. gi0/11 interfaces were configured as access ports so we don’t need to configure them in this sim.250. in fact it is not necessary because the network 190.actualtests.31 SwitchC(config-router)# network 190.

0.0.0. Use the console access to the existing and new switches to configure and verify correct device configuration.200.actualtests. we are pretty sure instead of using two commands “network 190.200." . QUESTION NO: 101 You have been asked to install and configure a new switch in a customer network.250. But after finishing the configuration. just for sure.31 we can use one simple command “network 190. Any Time.0 is shown.Cisco 300-115 Exam relationship is formed between RouterC and SwitchC.200.www. even without “no auto-summary” command the network still works correctly.0.0 because it is the nature of distance vector routing protocol like EIGRP: only major networks need to be advertised. "Pass Any Exam.31 and “network 190. we can use “show run” command to verify.250.200.com 88 .32 0. In fact.0.64 0. But in the exam the sim is just a flash based simulator so we should use two above commands. only the summarized network 190.0.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

only SW4 will connect to servers in a private VLAN. Disable VTP pruning on SW1 only B. You are required to configure private VLANs for a new server deployment connecting to the SW4 switch. Which of the following configuration steps will allow creating private VLANs? A. Disable VTP pruning on SW2.www. SW4 and New_Switch E. Topic 2.Cisco 300-115 Exam Examine the VTP configuration. Disable VTP pruning on SW4 only D.actualtests." . you will need to only disable pruning on the switch that contains the private VLANs. 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 New_Switch and SW4 only. Disable VTP pruning on SW2 only C.com 103 . Any Time. In this case. Answer: C Explanation: To create private VLANs.

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

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

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

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

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

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

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

actualtests.-----------.e289 Dynamic 1 FastEthernet0/1 0010. integrated routing and bridging E. switch# show mac address-table B. including the switch port that the particular host is using. storm control B. Which option decreases consumption of bandwidth used by broadcast traffic? 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. Which two commands help trace this PC when the MAC address is known? (Choose two.www. switch# show port-security C. a network engineer discovered an unusually high level of broadcast traffic coming from one of the switch interfaces.1540 Dynamic 2 FastEthernet0/5 0010.1545 Dynamic 2 FastEthernet0/5 QUESTION NO: 116 While troubleshooting a network outage.7b00. switch# show ip verify source D.-------------------0010.0de0.com 111 . 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 ------------------.E Explanation: These two commands will show the MAC address table.) A.7b00. Cisco IOS parser D. switch# show ip arp inspection E.---. Any Time. switch# show mac address-table address <mac address> Answer: A. Dynamic ARP Inspection "Pass Any Exam." . SDM routing C.

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

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

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

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

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

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

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

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

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

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

cisco. It allows port security to secure the IP address that 802. perform this task: Command Purpose Step 1 Router(config)# interface {{type1 slot/port} | {port-channel number}} Selects an interface to configure.1X and Port Security "Pass Any Exam. It allows port security to secure the MAC address that 802. Step 2 Router(config-if)# storm-control action shutdown (Optional) Configures traffic storm control to error-disable ports when a traffic storm occurs.1x to secure the MAC address that port security authenticates. router(config-if)#storm-control action error D.html QUESTION NO: 131 A network engineer configures port security and 802. It allows 802.1x on the same interface. • Enter the no storm-control action shutdown command to revert to the default action (drop).www. D.Cisco 300-115 Exam C. It allows 802. or the shutdown and no shutdown commands to reenable ports.com 122 .com/c/en/us/td/docs/switches/lan/catalyst6500/ios/122SX/configuration/guide/book/storm.1x authenticates. Answer: A Explanation: 802.1x to secure the IP address that port security authenticates. Any Time.actualtests. Reference: http://www. Which option describes what this configuration allows? A. • Use the error disable detection and recovery feature. 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.1x authenticates. C. B." .

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

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

Cisco 300-115 Exam QUESTION NO: 135 When you configure a private VLAN.0/24. which type of port must you configure the gateway router port as? A. Any Time. • Filtering should be implemented as close to the serverfarm as possible. 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.120. The Radius server and application servers will be installed at a future date.org/wiki/Private_VLAN QUESTION NO: 136 CORRECT TEXT SWITCH. access port Answer: A Explanation: There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port.www.com 125 . For security reasons.40. • Packets from devices in any other address range should be dropped on VLAN 20. The topology diagram indicates their layer 2 mapping. promiscuous port B. You have been tasked with implementing the above access control as a pre-condition to installing the servers.40. Reference: http://en. Corporate polices do not allow layer 3 functionality to be enabled on the switches." .120. • Devices on VLAN 20 are restricted to the subnet of 172. isolated port C.120. Host port further divides in two types – Isolated port (I-Port) and Community port (C-port). You must "Pass Any Exam. DSW1 and ASW1. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server. Authentication is to be done via a Radius server: • Radius server host: 172.40. community port D.wikipedia.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches. • Packets from devices in the subnet of 172.46 • Radius key: rad123 • Authentication should be implemented as close to the host as possible.actualtests.0/24 should be allowed on VLAN 20.

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

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.120.com 127 .0.39.actualtests.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.www.0 0.46 key rad123 ASW1(config)#aaa authentication dot1x default group radius ASW1(config)#dot1x system-auth-control ASW1(config)#inter fastEthernet 0/1 ASW1(config-if)#switchport mode access ASW1(config-if)#dot1x port-control auto ASW1(config-if)#exit ASW1#copy run start Step2: Console to DSW1 from PC console 2 DSW1(config)#ip access-list standard 10 DSW1(config-ext-nacl)#permit 172.0." .120.40. Any Time.

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

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

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

0.Weighted algorithm. .com 131 .0.0.2 – udp 1985 (version1)224.18 – IP 112 224.0.102 udp 3222 Timers Hello – 3 seconds Advertisement – 1 second Hello – 3 seconds (Hold) 10 seconds (Master Down Interval)3 * Advertisement + skew time (Hold) 10 seconds (Skew time)(256-priority) / 256 Load-balancing functionality .Cisco 300-115 Exam yes yes Preempt yes yes yes Timer adjustments yes yes yes Traffic type 224.Host-dependent algorithm.0." .0.wordpress.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.(generally through DHCP) Clients are transparently updated with virtual MAC according to load-balancing algorithm through ARP requesting a unique virtual gateway.www.Multiple VRRP group per interface/SVI/routed int.. Load-balancing oriented. Requires appropriate distribution of Virtual GW IP per Clients for optimal load-balancing.Multiple HSRP group per interface/SVI/routed int.Round-Robin algorithm (default). Any Time.0.(generally through DHCP) Requires appropriate distribution of Virtual GW IP per Clients for optimal load-balancing.0.actualtests. . Reference: http://cciethebeginning.102-udp 1985 (version2) 224.

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

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

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

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

%GLBP-4-DUPADDR: Duplicate address The error message indicates a possible layer2 loop and STP configuration issues.actualtests. Unavailable GLBP active forwarder B. then it indicates that this router is receiving its own hello packets sent. Verify the spanning-tree topology and check if there is any layer2 loop.com/en/US/products/hw/switches/ps708/products_configuration_example09186a 00807d2520.www.shtml#dr "Pass Any Exam.255.Cisco 300-115 Exam QUESTION NO: 147 Refer to the exhibit. Note: GLBP members communicate between each other through hello messages sent every 3 seconds to the multicast address 224.102 and User Datagram Protocol (UDP) port 3222 (source and destination).cisco. permit the Multicast address by permit 224. Layer 2 loop Answer: D Explanation: This section provides information you can use to troubleshoot your configuration. If the MAC address of the interface is the same as the one reported in the error message.0 15. Reference: http://www.0. If the interface MAC address is different from the one reported in the error message. HSRP configured on same interface as GLBP D. Incorrect GLBP IP address C.255. When configuring the multicast boundary command.0. Any Time. then some other device with a MAC address reports this error message.0. In order to resolve this issue.255. Which option describes the reason for this message in a GLBP configuration? A. issue the show interface command to verify the MAC address of the interface.0.com 136 ." .

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

so all outgoing traffic will be forwarded to R1." .Cisco 300-115 Exam Answer: D Explanation: Based on the following output. "Pass Any Exam.www. Any Time. 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. They have questions about how these two devices will perform in the event of a device failure. we see that R1 is the active standby router for the Ethernet 0/0 link.actualtests.com 154 .

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

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

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

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

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

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

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

0000. 0000.ac01 E.0010 as shown below: "Pass Any Exam.com 162 .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.www.0c07." . Any Time.0000.0c07.ac01 D. 4000.ac02 F.ac02 B.0000. 0000.Cisco 300-115 Exam What is the virtual mac-address of HSRP group 1? A. 4000.0010 C.0000.actualtests.0c07. 0000. 4000.

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

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

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

C.com 166 . Configure a SPAN session to monitor the received traffic on interface g0/5 for all VLANs except VLAN 3.www.Cisco 300-115 Exam QUESTION NO: 164 Refer to the exhibit." . Configure a SPAN session to monitor the received traffic on interface g0/5 only for VLAN 3. 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. shutdown C. What is the result of the SPAN configuration on a Cisco switch? A.actualtests. Configure a SPAN session to monitor the received traffic on interface g0/4 for all VLANs except VLAN 3. Answer: A Explanation: QUESTION NO: 165 When SDM templates are configured. D. B. Configure a SPAN session to monitor the received traffic on interface g0/4 only for VLAN 3. Any Time. reload B. which action must be performed for the configuration to take effect? A. write memory D.

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

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

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

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

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

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

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

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

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

HSRP supports up to 255 groups on the same switch or router.Cisco 300-115 Exam Which two statements about HSRP.actualtests. "Pass Any Exam. GLBP allows for a maximum of four MAC addresses per group. spanning-tree loop B. HSRP misconfiguration C. 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. one standby router.com 176 . E. B. VRRP is a Cisco proprietary protocol. and VRRP are true? (Choose two. D.10.1.) A. HSRP is the preferred protocol to be used on multivendor environments.www. Any Time. and many listening routers. VRRP has one master router." . GLBP.1 D. a PC with IP of 10. C.D Explanation: QUESTION NO: 186 Refer to the exhibit. Which option is the most likely explanation of the duplicate address message logged? A. Answer: C.

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

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

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

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