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Actualtests 300-115 Galvin 158q

Number: 300-115
Passing Score: 800
Time Limit: 120 min
File Version: 16.5

Exam code: 300-115
Exam name: Implementing Cisco IP Switched Networks

Question Set 1
QUESTION 1
What is the maximum number of switches that can be stacked using Cisco StackWise?
A.
B.
C.
D.
E.
F.

4
5
8
9
10
13

Correct Answer: D
Section: [none]
Explanation
Explanation/Reference:
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-series- switches/qa_c67-722110.html
QUESTION 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.
B.
C.
D.
E.

No configuration must be added.
stack ID
IP address
VLAN information
VTP information

Correct Answer: A
Section: [none]
Explanation
Explanation/Reference:
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, the switch type, and the inter- faces 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 re- ceives 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 provi- sioned 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 num- 1. If the stack member number The switch stack applies bers and the switch types of the provisioned switch the provisioned configuramatch. matches the stack member num- tion to the provisioned ber in the provisioned configura- switch and adds it to the tion on the stack, and stack.
2. If the switch type of the provisioned switch matches the switch
type in the provisioned configuration on the stack.
The stack member num- 1. If the stack member number The switch stack applies bers match but the switch of the provisioned switch the default configuration to
types do not match. matches the stack member num- the provisioned switch and ber in the provisioned configuration on the stack, but adds it to the stack.
2. The switch type of the provi- The provisioned configura- sioned switch does not match the tion is changed to reflect switch type in the provisioned the new
information.
configuration on the stack.
The stack member num- The switch stack applies
ber is not found in the pro- the default configuration to
visioned configuration. the provisioned switch and
adds it to the stack.
The provisioned configuration is changed to reflect
the new information.
The stack member num- The stack master assigns a new The switch stack applies ber of the provisioned stack member number to the pro- the provisioned
configura- switch is in conflict with an visioned switch. tion to the provisioned existing stack member. switch and adds it to the
The stack member numbers and

stack.
the switch types match:
The provisioned configura1. If the new stack member
tion is changed to reflect
number of the provisioned switch
the new information.
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 stack member numbers The switch stack applies
match, but the switch types do the default configuration to not match: the provisioned switch and
adds it to the stack.
1. If the stack member number
of the provisioned switch The provisioned configuramatches the stack member num- tion is changed to reflect
ber in the provisioned configura- the new information.
tion on the stack, but
2. The switch type of the provisioned switch does not match the
switch type in the provisioned
configuration on the stack.
The stack member num- The switch stack applies
ber of the provisioned the default configuration to
switch is not found in the the provisioned switch and
provisioned configuration. adds it to the stack.
Reference:
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12- 2_55_se/configuration/guide/3750xscg/swstack.html
QUESTION 3
What percentage of bandwidth is reduced when a stack cable is broken?
A.
B.
C.
D.
E.

0
25
50
75
100

Correct Answer: C
Section: [none]
Explanation
Explanation/Reference:
Explanation:
Physical Sequential Linkage
The switches are physically connected sequentially, as shown in Figure 3. A break in any one of the cables will result in the stack bandwidth being reduced to half of
its full capacity. Subsecond timing mechanisms detect traffic problems and immediately institute failover. This mechanism restores dual path flow when the timing
mechanisms detect renewed activity on the cable.
Figure 3. Cisco StackWise Technology Resilient Cabling

Reference: http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-3750-series- switches/prod_white_paper09186a00801b096a.html
QUESTION 4
Refer to the exhibit.

Which set of configurations will result in all ports on both switches successfully bundling into an EtherChannel?
A. switch1
channel-group 1 mode active
switch2
channel-group 1 mode auto
B. switch1
channel-group 1 mode desirable
switch2
channel-group 1 mode passive
C. switch1
channel-group 1 mode on
switch2
channel-group 1 mode auto
D. switch1
channel-group 1 mode desirable
switch2
channel-group 1 mode auto
Correct Answer: D
Section: [none]
Explanation
Explanation/Reference:
Explanation:
The different etherchannel modes are described in the table below:
Mode Description
active Places an interface into an active negotiating state, in which the interface starts negotiations with other interfaces by sending LACP packets.
auto Places an interface into a passive negotiating state, in which the interface re- sponds to PAgP packets it receives but does not start PAgP packet negotia- tion.
This setting minimizes the transmission of PAgP packets.
desirable Places an interface into an active negotiating state, in which the interface starts negotiations with other interfaces by sending PAgP packets.
on Forces the interface into an EtherChannel without PAgP or LACP. With the on mode, a usable EtherChannel exists only when an interface group in the on mode
is connected to another interface group in the on mode.
passive Places an interface into a passive negotiating state, in which the interface re- sponds to LACP packets that it receives, but does not start LACP packet negotiation. This setting minimizes the transmission of LACP packets.
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, for Layer 2 EtherChannels, trunking state and VLAN numbers.
Interfaces can form an EtherChannel when they are in different PAgP modes as long as the modes are compatible. For example:
An interface in the desirable mode can form an EtherChannel with another interface that is in the desirable or auto mode.
An interface in the auto mode can form an EtherChannel with another interface in the desirable mode.
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.
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.
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12- 1_13_ea1/configuration/guide/3550scg/swethchl.html
QUESTION 5
Refer to the exhibit.

VLAN filtering refers to analyzing network traffic on a selected set of VLANs on trunk source ports. Switch A is configured with channel-group 1 mode active. The destination is always a physical port Reference: http://www. D. C. Change the monitor session source to VLAN 10 instead of the physical interface. use the monitor session filter global configuration command. A monitor session on the distribution switch with a physical interface as the source and the remote SPAN VLAN as the destination A remote SPAN VLAN on the distribution and access layer switch A monitor session on the access switch with a physical interface source and the remote SPAN VLAN as the destination A monitor session on the distribution switch with a remote SPAN VLAN as the source and physical interface as the destination A monitor session on the access switch with a remote SPAN VLAN source and the physical interface as the destination A monitor session on the distribution switch with a physical interface as the source and a physical interface as the destination Correct Answer: BCD Section: [none] Explanation Explanation/Reference: Explanation: 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. If VLAN filtering is configured. By default. SPAN copies (or mirrors) traffic received or sent (or both) on source ports or source VLANs to a destination port for analysis. The switch ports are not configured in trunking mode. D. while Switch B is configured with channel-group 1 mode desirable.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12.2_55_se/configuration/guide/3750xscg/swspan. B. You select a series or range of VLANs by using the [ .com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/3se/network_m anagement/command_reference/b_nm_3se_3850_cr/ b_nm_3se_3850_cr_chapter_010. The switches are using mismatched EtherChannel negotiation modes. You can have a total of 66 SPAN and RSPAN sessions on a switch or switch stack. If you specify a series of VLANs. | -] options. F. You can monitor traffic on a single VLAN or on a series or range of ports or VLANs. Reference: http://www. Here is a summary of the various etherchannel modes: . Which three items must be configured to mirror traffic to a packet sniffer that is connected to the distribution switch? (Choose three.html QUESTION 7 After an EtherChannel is configured between two Cisco switches. C. C.cisco.html#wp3 875419997 QUESTION 6 Refer to the exhibit. or to limit (filter) SPAN source traffic to specific VLANs. which is an LACP mode. all VLANs are monitored on trunk source ports. VLAN filtering cannot be enabled. you must enter a space before and after the hyphen ( -). Add an access list to GigabitEthernet0/48 to filter out traffic that is not in VLAN 10. VLAN monitoring and VLAN filtering are mutually exclusive. If a VLAN is a source. a VLAN cannot become a source. E.) A. 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. which is a PAGP mode. Usage Guidelines You can set a combined maximum of two local SPAN sessions and RSPAN source sessions. source VLANs. Change the configuration for GigabitEthernet0/48 so that it is a member of VLAN 10. Why is the EtherChannel bundle not working? A. B. interface port channel 1 is in the down/down state. 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. Apply the monitor session filter globally to allow only traffic from VLAN 10. enabling remote monitoring of multiple switches across your network. D. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Here we have a situation where one switch is using active mode.cisco. The channel group identifier must be different for Switch A and Switch B. and destination ports on different switches (or different switch stacks). and the other is using desirable. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: To start a new flow-based SPAN (FSPAN) session or flow-based RSPAN (FRSPAN) source or destination session. Each RSPAN source switch must have either ports or VLANs as RSPAN sources. LACP priority must be configured on both switches. 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. If you specify a range of VLANs. you must enter a space before and after the comma. You can not mix the LACP and PAGP protocols to form an etherchannel. RSPAN supports source ports.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. A network engineer wants to analyze all incoming and outgoing packets for an interface that is connected to an access switch. B.

html/index. The mode you select applies to all EtherChannels that you configure on the switch.EtherChannel PAgP Modes Mode Description auto Places a port into a passive negotiating state. This setting minimizes the transmission of PAgP packets. Traffic from VLANs 1 to 8.com/c/en/us/td/docs/switches/lan/catalyst4500/12. IP addresses. but does not start LACP packet negotiation. destination mode.tions with other ports by sending PAgP packets.tions with other ports by sending LACP packets. in which the port starts negotia. passive Places a port into a passive negotiating state in which the port responds to LACP packets that it receives. CDP can be used to determine the physical topology.cisco. E. Reference: http://www. Which vendor-neutral protocol could be used to resolve this issue? .ent switches in the switch stack (cross-stack EtherChannel). All VLAN traffic is sent to the SPAN destination interface. The routers are connected via a Layer 2 switch. What should be done on the Cisco switch to allow for better EtherChannel utilization to the corporate web server? A. 39. IP routing is disabled on neighboring devices. This mode is not supported when the EtherChannel members are from differ. then each router will only have the single switch port that it connects to as its neighbor.8. and 52 is replicated to the SPAN destination port. since all traffic is going to the same web server). or both. The network administrator noticed that only one of the EtherChannel links is being utilized to reach the web server. use of the destination MAC address results in the choice of the same link in the channel each time. 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 . a network engineer notices that directly connected devices that use Cisco Discovery Protocol are not visible. Correct Answer: E Section: [none] Explanation Explanation/Reference: Explanation: EtherChannel load balancing can use MAC addresses. B. Correct Answer: E Section: [none] Explanation Explanation/Reference: Explanation: The "monitor session filter" command is used to specify which VLANS are to be port mirrored using SPAN. EtherChannel LACP Modes Mode Description active Places a port into an active negotiating state in which the port starts negotia. This setting minimizes the transmission of LACP packets.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. Filtering a trunked SPAN port effectively disables SPAN operations for all VLANs. or Layer 4 port numbers. The engineer notices only a single neighbor that uses Cisco Discovery Protocol. D. 39. What would cause the output to show only the single neighbor? A. and either source mode. Even though multiple routing neighbors can be formed over a layer 2 network. C. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: If all of the routers are connected to each other using a layer 2 switch. C. desirable Places a port into an active negotiating state.2_55_se/configuration/guide/scg_2960/swethchl. QUESTION 11 After the implementation of several different types of switches from different vendors.html QUESTION 9 Interface FastEthernet0/1 is configured as a trunk interface that allows all VLANs. but it has several routing neighbor relationships. if the traffic on a channel only goes to a single MAC address (which is the case in this example. B. only the physical port that it connects to will be seen as a CDP neighbor. Adjust the EtherChannel load-balancing method based on source IP addresses. Enable Cisco Express Forwarding to allow for more effective traffic sharing over the EtherChannel bundle. This command is configured globally: monitor session 2 filter vlan 1 . Use link-state tracking to allow for improved load balancing of traffic upon link failure to the server. Disable spanning tree on all interfaces that are participating in the EtherChannel bundle.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12. Traffic from VLAN 4 is not sent to the SPAN destination interface. Use of source addresses or IP addresses can result in a better load balance.ent switches in the switch stack (cross-stack EtherChannel). This mode is not supported when the EtherChannel members are from differ. Cisco Discovery Protocol advertisements are inconsistent between the local and remote devices. The trunk's native VLAN must be changed to something other than VLAN 1. Use the option that provides the greatest variety in your configuration. D. C. Reference: http://www.html QUESTION 8 An EtherChannel bundle has been established between a Cisco switch and a corporate web server.cisco. 52 What is the result of the implemented command? A. B. 9 Reference: http://www. For example. Cisco Express Forwarding is enabled locally. D.html#wp1066836 QUESTION 10 A network engineer notices inconsistent Cisco Discovery Protocol neighbors according to the diagram that is provided.2/25ew/configuration/guide/conf/span. Adjust the EtherChannel load-balancing method based on destination IP addresses.5 . but not necessarily the logical topology.cisco. in which the port responds to PAgP packets it receives but does not start PAgP packet negotiation. E.

make sure that the password is the same on both sides. principally wired Ethernet.wikipedia. but Switch B does not receive any VLAN information.pdf QUESTION 14 Refer to the exhibit. Enable VTP version 3. only Layer 2 EtherChannels propagate VLAN information. VTP version 3 supports extended-range VLANs (VLAN numbers 1006 to 4094).shtml QUESTION 13 After implementing VTP. which supports extended VLAN propagation.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613. capabilities. Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: VTP version 1 and VTP version 2 do not propagate configuration information for extended. C. B. D. Switch C receives VLAN information from the VTP server Switch A. and neighbors on an IEEE 802 local area network. ·The VTP domain name must match and it is case sensitive. What is the most probable cause of this behavior? A. Make sure that the VLANs are active in all the devices. D.org/wiki/Link_Layer_Discovery_Protocol QUESTION 12 Several new switches have been added to the existing network as VTP clients. If you convert from VTP version 3 to VTP version 2. Verify these items if switches that run VTP fail to exchange VLAN information: VTP information only passes through a trunk port. VLANs are not passing from the VTP server (existing network) to the VTP clients. while Switch C is configured with a trunk port to Switch B. Make sure that if EtherChannels are created between two switches. Switch A. D. CISCO and cisco are two different domain names. All VLAN changes must be done on this switch in order to have them propagated to the VTP clients. Extended VLANs will not propagate to different IOS versions when extended VLANs are in use. Switch B is configured with an access port to Switch A. VTP allows a consistent view of the switched network across all switches. Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: VTP allows switches to advertise VLAN information between other members of the same VTP domain. VTP authentication is required when using extended VLANs because of their ability to cause network instability.cisco. Make sure that no password is set between the server and client. There are several reasons why the VLAN information can fail to be exchanged. You must configure extended-range VLANs manually on each network device. Provision one of the new switches to be the VTP server and duplicate information from the existing network. B.range VLANs (VLAN numbers 1006 to 4094).com/en/US/docs/switches/lan/catalyst6500/ios/15. C. The trunk between Switch A and Switch B is misconfigured. VTP does not support extended VLANs and should be manually added to all switches. B. and version. B.1SY/config_guide/sup2T/vtp . password. What should be configured for extended VLANs? A. C. the extended VLANs are not being propagated to other VTP switches.cisco. C. Reference: http://www. Ensure that all switches run the same Cisco IOS version. LLDP performs functions similar to several proprietary protocols. Ensure that all switch interconnects are configured as trunks to allow VTP information to be transferred. If any password is set. However. Remove the VTP domain name from all switches with "null" and then replace it with the new domain name. All of the new switches have been configured with the same VTP domain.A. the VLANs in the range 1006 to 4094 are removed from VTP control. Switch B is configured in transparent mode. One of the switches must be the VTP server in a VTP domain. Correct Answer: A Section: [none] Explanation . Local Area Mobility Link Layer Discovery Protocol NetFlow Directed Response Protocol Correct Answer: B Section: [none] Explanation Explanation/Reference: 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. Reference: http://en. D. B. The VTP revision number of the Switch B is higher than that of Switch A. Make sure that all ports that interconnect switches are configured as trunks and are actually trunking. Reference: http://www. and C are trunked together and have been properly configured for VTP. What must be done to fix this? A. Configure a different native VLAN on all new switches that are configured as VTP clients. such as the Cisco Discovery Protocol (CDP).

Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: RSTP works by adding an alternative port and a backup port compared to STP." What is the reason for this change? A.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094c52. These ports are allowed to immediately enter the forwarding state rather than passively wait for the network to converge. A VTP transparent switch does not advertise its VLAN configuration and does not synchronize its VLAN configuration based on received advertisements. while a half-duplex port is considered as a shared port by default. B. RSTP has been enabled per interface and not globally. The VTP revision number of Switch B is higher than that of Switch A. B. D. C. multicast.protocol/24062-146.cisco. What is the reason for this? A. B.point links.Explanation/Reference: Explanation: VTP transparent switches do not participate in VTP. VTP pruning is configured globally on all switches and it removed VLANs from the trunk interface that is connected to Switch C. Correct Answer: C Section: [none] Explanation Explanation/Reference: 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. A port that operates in full-duplex is assumed to be point-to-point. a network administrator can manually disable a port Reference: http://www. QUESTION 16 After the recent upgrade of the switching infrastructure. C.html QUESTION 18 Which technique automatically limits VLAN traffic to only the switches that require it? . Reference: http://www. B. Switch B has all VLANs. The alternative port moves to the forwarding state if there is a failure on the designated port for the segment. C. In switched networks today. The new switches are using RSTP instead of legacy IEEE 802. VTP pruning blocks unneeded flooded traffic to VLANs on trunk ports that are included in the pruningeligible list. Switch A. is that VTP pruning has been configured.protocol/24062-146. Reference: http://www. To have two links to the same collision domain.1D STP and PortFast have been configured by default on all newly implemented Cisco Catalyst switches. The port roles have been adjusted based on the interface bandwidth and timers of the new Cisco Catalyst switches. * Backup port A backup/redundant path to a segment where another bridge port already connects. but Switch C is not receiving traffic from certain VLANs. but transparent switches do forward VTP advertisements that they receive out their trunk ports in VTP Version 2. The administrator has defined the switch as the root in the STP domain. STP is unable to achieve rapid transition for trunk links. What would cause this issue? A. Without VTP pruning. * Disabled port Not strictly part of STP.com/c/en/us/support/docs/lan-switching/spanning-tree. The STP root bridge selection is forcing key ports to remain in non-rapid transitioning mode. This path is different than using the root port. VTP pruning is disabled by default. D. D. a switch floods broadcast. The switch does not have the processing power to ensure rapid transition for all ports.com/c/en/us/support/docs/lan-switching/ spanning-tree.shtml QUESTION 15 Refer to the exhibit. The backup port applies only when a single switch has two links to the same segment (collision domain).cisco. the switch must be attached to a hub. This automatic link type setting can be overridden by explicit configuration. The best explanation for why switch C is not seeing traffic from only some of the VLANs. 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.cisco. This makes them candidates for rapid transition to the forwarding state.1D STP. and C are trunked together and have been properly configured for VTP. The link type is automatically derived from the duplex mode of a port.html QUESTION 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. IEEE 802. not on trunk links. it has been determined that several ports are not transitioning as they should. and unknown unicast traffic across all trunk links within a VTP domain even though receiving switches might discard them. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: RSTP can only achieve rapid transition to the forwarding state on edge ports and on point-to. A VTP authentication mismatch occurred between Switch A and Switch B. The trunk between Switch A and Switch B is misconfigured. the network engineer notices that the port roles that were once "blocking" are now defined as "alternate" and "backup. After testing.

B. . access lists DTP in nonegotiate VTP pruning PBR Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: VTP pruning enhances network bandwidth use by reducing unnecessary flooded traffic. The switch needs to be rebooted before the SDM template takes effect.cisco. 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.html#wp1126206 QUESTION 20 While working in the core network building. a technician accidently bumps the fiber connection between two core switches and damages one of the pairs of fiber. this can be done by issuing shutdown followed by no shutdown on the interface. macros errdisable autorecovery IP Event Dampening command aliases Bidirectional Forwarding Detection Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: There are a number of events which can disable a link on a Catalyst switch. such as the detection of a loopback. After the damaged cable was replaced.table? A. The MAC address-table will hold addresses 180 seconds longer than the default of 10 minutes. Entering the value 0 disables the MAC aging.cisco. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: SDM Template Notes: All templates are predefined. We can configure the switch to automatically re-enable any error-disabled interfaces after a specified timeout period. VTP pruning increases available bandwidth by restricting flooded traffic to those trunk links that the traffic must use to access the appropriate network devices. manual intervention by an administrator is necessary to restore the interface to working order. This is where errdisable autorecovery can be of great assistance. the aging specification applies to all VLANs.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/ CLIConfigurationGuide/MACAddress.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. The VLAN receives additional frames from neighboring switches. Reference: http://packetlife. C. There is no way to edit template category individual values.A. such as broadcast. and (ideally) correct the issue. E. B. and a steady recurrence of these can amount to a huge time sink for the administrative staff. multicast. unknown. C. by removing an unapproved device) without the need for administrative intervention. the link did not recover. assess. The idea behind requiring administrative action is so that a human engineer can intercede. As designed. By default.2SX/configuration/guide/book/vtp. ARP requests will be processed less frequently by the switch. terminal Step 2 switch(config)# mac.html#wp1020444 QUESTION 19 What effect does the mac address-table aging-time 180 command have on the MAC address.Specifies the time before an entry ages out address-table aging. or a broadcast storm. However.net/blog/2009/sep/14/errdisable-autorecovery/ QUESTION 21 A network engineer deployed a switch that operates the LAN base feature set and decides to use the SDM VLAN template. B. C. The VLAN template disables routing in hardware. By default. The SDM template is causing the CPU of the switch to spike during peak working hours. The SDM VLAN template causes the MAC address-table to overflow. the link was placed into a non-forwarding state due to a fault with UDLD. The MAC address-table will be flushed every 3 minutes. E. If a VLAN is not specified. The default timeout period will be 360 seconds.and is discarded from the MAC address table. B. What solution allows the network switch to automatically recover from such an issue? A. UDLD failure. the default is vlan_id] 300 seconds. D. D. some configurations may be prone to accidental violations. D. Reference: http://www. This is how long a dynamic MAC address will remain in the CAM table. What is the root cause of this issue? A. D. VTP pruning is disabled. C. and flooded unicast packets to only the switches that require it. perform this task: Command Purpose Step 1 switch# configure Enters configuration mode. To configure the aging time for all MAC addresses. This gives the offending issue a chance to be cleared by the user (for example. time seconds [vlan The range is from 0 to 1000000. Correct Answer: A Section: [none] Explanation Explanation/Reference: 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.

html#wp1040905 QUESTION 23 Refer to the exhibit. Reference: http://www. The EtherChannels would form.html#wp1020804 QUESTION 24 A network engineer tries to configure storm control on an EtherChannel bundle. the network administrator notices that not all traffic is being replicated to the management server. If the boundary is exceeded. C. You can configure ports or EtherChannels in any VLAN as SPAN sources. D. Correct Answer: D . Choosing the VLAN template will actually disable routing (number of entry for unicast or multicast route is zero) in hardware. The EtherChannels would form and both devices would use the dst-ip load-balancing method because Switch1 is configured with EtherChannel mode active.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. but network loops would occur because the load-balancing methods do not match. RSPAN must be used to capture EtherChannel bidirectional traffic. but not a destination. SPAN encapsulation replication must be enabled to capture EtherChannel destination traffic. but not a destination.2SX/configuration/guide/book/ span. This is true for the switch globally. generate the number of TCAM entries listed for security and QoS ACEs. Trunk ports or EtherChannels can be configured as sources and mixed with nontrunk sources. all channels (manually configured. The settings will be applied to the EtherChannel bundle and all associated physical interfaces. The ACL merge algorithm. B. C. What is a cause for this issue? A. Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: An etherchannel will form if one end is active and the other is passive.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12.html QUESTION 22 An access switch has been configured with an EtherChannel port. A port-channel interface (an EtherChannel) can be a SPAN source. although each switch involved in the etherchannel can have non matching parameters for load balancing. C. After configuring SPAN to monitor this port. or LACP) use the same load-balancing.com/c/en/us/support/docs/switches/catalyst-3750-series. B.cisco. As a result.The switch reload is required to use a new SDM template.com/c/en/us/ td/docs/switches/lan/catalyst4500/12. but will only be present on the physical interfaces. The first eight lines (up to Security ACEs) represent approximate hardware boundaries set when a template is used.switches/44921-swdatabase-3750ss-44921. but not on the associated physical ports. Reference: http://www.2/54sg/configuration/guide/config/channel. VLAN filters are required to ensure traffic mirrors effectively. The configuration will be rejected because storm control is not supported for EtherChannel.cisco. You can configure both Layer 2 and Layer 3 ports and EtherChannels as SPAN sources. PagP. Reference: http://www. The port channel can be used as a SPAN source. The EtherChannels would form and function properly even though the load-balancing and EtherChannel modes do not match.cisco. The storm control configuration will be accepted. as opposed to the original access control entries (ACEs) configured by the user. all processing overflow is sent to the CPU which can have a major impact on the performance of the switch. D. What is the result of the configuration? A. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: A source port or EtherChannel is a port or EtherChannel monitored for traffic analysis. B. The table below sum. The storm control settings will appear on the EtherChannel. SPAN can monitor one or more source ports or EtherChannels in a single SPAN session. What is the result of the configuration? A. The EtherChannels would not form because the load-balancing method must match on the devices. D.

D. PVST+ PortFast BackboneFast UplinkFast Loop Guard UDLD Correct Answer: D Section: [none] Explanation . a Network Administrator noticed that one port stops receiving UDLD packets. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: By default.over-blog. UDLD tries to reestablish the connection with the neighbor. Reference: http://ciscorouterswitch. UDLD moved into aggressive mode after inconsistent acknowledgements were detected.4 Tbps. C.cisco. This enables UDLD in normal mode.cisco. The port then transitions into the errdisable state. VSS formed by two Cisco Catalyst 6500 Series Switches with the Virtual Switching Supervisor 720-10GE." Which statement describes what this indicates about the status of the port? A. Reference: http://www. UDLD port is configured in aggressive mode. C. Storm Control is an exception to this rule. B. boosting nonstop communications. and not at the physical interface level. F. forward traffic simultaneously using both supervisors forward traffic based on Cisco Express Forwarding provide automatic failover to back up supervisor in VSS mode provide nonstop forwarding in the event of failure of one of the member supervisors Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: VSS is network system virtualization technology that pools multiple Cisco Catalyst 6500 Series Switches into one virtual switch. UDLD is disabled on all interfaces. Which spanning-tree technology is used to accomplish backup root port selection? A.2SX/configuration/guide/book/udld. B. Reference: http://packetlife.com/c/en/us/td/docs/switches/lan/catalyst4500/12. any configuration that you apply to the physical interfaces affects only the interface where you apply the configuration. you cannot configure Storm Control on some of the members of an EtherChannel. STP immediately replaces the root port with an alternative root port. The UDLD port is placed in the "unknown" state for 5 seconds until the next UDLD packet is received on the interface. 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. UDLD is enabled globally. In a VSS. It would be prohibitively difficult to coordinate the configuration of UDLD on both ends of a link at the same time. Normal UDLD operations that prevent traffic loops. C. D. the status will transition to bidirectional. any configuration that you apply to the port-channel interface affects the EtherChannel. and scaling system bandwidth capacity to 1. Only one of the virtual switch members has the active control plane. The bidirectional status of "unknown" indicates that the port will go into the disabled state because it stopped receiving UDLD packets from its neighbor.124536783. When UDLD is finally enabled on the other end. C.html QUESTION 25 What is the function of NSF? A. B. you should configure Storm Control at the EtherChannel Interface level. E. We can enable UDLD globally on the device. After eight failed retries.Section: [none] Explanation Explanation/Reference: Explanation: After you configure an EtherChannel. the port is disabled.com/article-cisco-catalyst-6500-series-vss-1440. or individually on specific interfaces with the command udld port. increasing operational efficiency. 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.html QUESTION 27 After reviewing UDLD status on switch ports.net/blog/2011/mar/7/udld/ QUESTION 28 Pilot testing of the new switching infrastructure finds that when the root port is lost. when a port on a bidirectional link that has a UDLD neighbor relationship established stops receiving UDLD packets. D. D.com/c/en/us/td/docs/switches/lan/ catalyst6500/ios/12. UDLD timers are inconsistent. Storm Control must be configured on all or none of the ports. Reference: http://www. so when UDLD is first enabled and does not detect a neighbor the link state is considered unknown. The port will remain operational during this time. Which option describes what causes the port to go into the errdisable state? A.2/31sg/configuration/guide/ conf/channel. This port continues to reestablish until after eight failed retries. combining for an active 1400Gbps switching capacity per VSS. which is not necessarily an error condition. an engineer notices that the. If you configure Storm Control on only some of the ports.html QUESTION 26 After UDLD is implemented. Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: With UDLD aggressive mode enabled. The port is fully operational and no known issues are detected. those ports will be dropped from the EtherChannel interface (put in suspended state). Switches would operate as a single logical virtual switch called a virtual switching system 1440 (VSS1440). For example. Therefore.

The interface is configured as the source of the SPAN session. C. port priority. By enabling UplinkFast with the spanningtree uplinkfast global configuration command.html QUESTION 29 A network engineer must adjust the STP interface attributes to influence root port selection. Ensure that IP CEF is enabled globally to support all load balancing methods.cisco. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: With the SAPN destination port.2_55_se/configuration/guide/scg_2960/swstpopt. D. C. EtherChannel load balancing can use MAC addresses or IP addresses. There is a speed mismatch on the interface. D. except for self-looping ports. Specifically. an uplink group consists of the root port (which is forwarding) and a set of blocked ports. switch priority.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12. Adjust the switch SDM back to "default". If a network segment in the spanning tree fails and a redundant path exists. Reference: http://www. D. Upgrade the PFC to support the latest load balancing methods.html QUESTION 31 Refer to the exhibit. the state of the destination port is up/down by design.cisco.com/en/US/products/hw/switches/ps708/products_tech_note09186a008015c61 2.com/c/en/us/td/docs/switches/lan/catalyst2960/software/release/12. Correct Answer: A Section: [none] Explanation Explanation/Reference: 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. 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.cisco. source or destination addresses. Reference: http://www. When two ports on a switch are part of a loop. Reference: http://www. called bridge protocol data units (BPDUs). The root port transitions to the forwarding state immediately without going through the listening and learning states. port-priority cost forward-timers link type root guard Correct Answer: AB Section: [none] Explanation Explanation/Reference: Explanation: Spanning tree forces redundant data paths into a standby (blocked) state. as it would with the normal spanning-tree procedures. at regular intervals. Which action must be done to apply a new load balancing method? A. What is causing the line protocol on this interface to be shown as down? A. 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. Reference: http://www. An uplink group is a set of Layer 2 interfaces (per VLAN). and path cost. you can accelerate the choice of a new root port when a link or switch fails or when the spanning tree reconfigures itself. There is a duplex mismatch on the interface. BPDUs contain information about the sending switch and its ports. B. 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. This is the normal operational state for SPAN destinations. The spanning-tree port priority value represents the location of a port in the network topology and how well it is located to pass traffic. it begins using the alternate paths as soon as the spanning tree selects a new root port. E. B. There is a layer 1 physical issue.2_55_se/configuration/guide/3750xscg/swstp. The interface is configured as the target of the SPAN session. E. Switches send and receive spanning-tree frames.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. B.cisco.) A. A network engineer investigates a recent network failure and notices that one of the interfaces on the switch is still down. the spanningtree algorithm recalculates the spanning-tree topology and activates the standby path. Configure the new load balancing method using port-channel load-balance. UplinkFast provides fast convergence after a direct link failure and achieves load balancing between redundant Layer 2 links using uplink groups. The mode applies to all EtherChannels that are configured on the switch. The path cost value represents the media speed. 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. or both source and destination addresses. including switch and MAC addresses. only one of which is forwarding at any given time.html QUESTION 30 A network engineer must set the load balance method on an existing port channel.shtml . The switches do not forward these frames but use them to construct a loop-free path. The uplink group provides an alternate path in case the currently forwarding link fails. C. Which two elements are used to accomplish this? (Choose two.Explanation/Reference: Explanation: I f a switch loses connectivity.

You must manually configure the neighboring interface as a trunk interface to establish a trunk link.xml&pid=2&converted=0 QUESTION 33 Which technique allows specific VLANs to be strictly permitted by the administrator? A. B. D. Reference: http://www. C. you can remove VLANs from the allowed list. All VLAN IDs. but may be disabled.) A.) A.aspx? docid=0ed03cbac49b446ab390a657917d817c_Cisco_Discovery_Protocol_CDP__Properties_Set tings_on_Sx500_S. E. PPP DTP ISL HDLC DLCI DOT1Q Correct Answer: CF Section: [none] Explanation Explanation/Reference: Explanation: Switches such as the Catalyst 3550 that are capable of either 802. a trunk port sends traffic to and receives traffic from all VLANs. After verifying all VTP settings. This is the default version on all switches. C. Configure trunk and access interfaces manually.This is the first version of CDP which was used for the discovery of Cisco devices in the network. otherwise the link will be a non-trunking link.PDF QUESTION 36 A network is running VTPv2. use the "switchport trunk allowed vlan remove vlan-list" interface configuration command to remove specific VLANs from the allowed list. Cisco Discovery Protocol version 2 Cisco IOS Embedded Event Manager logging buffered Cisco Discovery Protocol source interface Cisco Discovery Protocol logging options Correct Answer: A Section: [none] Explanation Explanation/Reference: CDP Version 1 -.This is the most recent version of CDP which has enhanced features such as rapid reporting mechanism. Apply BPDU guard and BPDU filter. configure "switchport nonegotiate. To disable DTP. D.ciscopress.cisco. are allowed on each trunk. Disable DTP on a per interface basis. Enable switchport block on access ports. C. CDP Version 2 -.57313/Dynamic%20Trunking%20Protocol. E. However. preventing traffic from those VLANs from passing over the trunk.com/servlet/JiveServlet/previewBody/14792-102-1. the network engineer notices that the new switch is not receiving the list of VLANs from the server." This prevents the interface from generating DTP frames. VTP pruning transparent bridging trunk allowed VLANs VLAN access-list L2P tunneling Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: By default.cisco. Which two actions can prevent interface trunking? (Choose two.1Q or ISL trunking encapsulation. It allows you to track instances even if the native VLAN ID or port duplex states do not match between connecting devices.com/en/US/docs/switches/lan/catalyst3550/software/release/12. Correct Answer: AB Section: [none] Explanation Explanation/Reference: Explanation: The Dynamic Trunking Protocol (DTP) is used to negotiate forming a trunk between two Cisco devices. D. which is used to track down errors and minimize costly downtime. Reference: https://learningnetwork.com/articles/article.com/CiscoSB/GetArticle.1_13_ea1/confi guration/guide/swvlan. B. This version is mainly used for backward compatibility. B.cisco. Reference: http://sbkb.asp?p=2181837&seqNum=8 QUESTION 35 Which two protocols can be automatically negotiated between switches for trunking? (Choose two.html QUESTION 34 For security reasons. Reference: http://www. You can use this command only when the interface switchport mode is access or trunk. E. the IT manager has prohibited users from dynamically establishing trunks with their associated upstream switch. and is enabled by default. the switchport trunk encapsulation [dot1q | isl | negotiate] interface command must be used prior to the switchport mode trunk command. B. DTP causes increased traffic. D. it is found that rapid error tracking is not currently enabled. C. Which action resolves this problem? . To restrict the traffic a trunk carries. Which option must be enabled to allow for enhanced reporting mechanisms using Cisco Discovery Protocol? A. F.QUESTION 32 While doing network discovery using Cisco Discovery Protocol. 1 to 4094.

You must reenter the password if you enter a takeover command in the domain.link QUESTION 40 When you design a switched network using VTPv2. 1001 C. C. Instead. VTP pruning--Avoid this method if the goal is to reduce the number of STP instances. 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. and overwrite any others that were previously defined. QUESTION 37 After configuring new data VLANs 1020 through 1030 on the VTP server. Which enhancement to a spanning-tree design prevents unnecessary traffic from crossing the extended LAN segment? A. VTP. The VTP server must be reloaded.30 is issued. you cannot convert from VTP version 3 to version 1 or 2. Reload the new switch. Support for extended range VLAN (VLANs 1006 to 4094) database propagation. Use VTP pruning on the trunk interfaces.html#wp1316856 QUESTION 38 A network engineer is extending a LAN segment between two geographically separated data centers. The command effectively removed all other working VLANs and replaced them with the new VLANs.cisco.cisco. how many VLANs can be used to carry user traffic? A. When you enter the secret keyword. B. D. The first thing that should be done is to verify that the trunk ports are connected and up.shtml QUESTION 39 The network manager has requested that several new VLANs (VLAN 10. Allowing additional VLANs across the trunk introduced a loop in the network. You would also need to explicitly allow the other working VLANs to this configuration command.A. a network engineer notices that none of the VTP clients are receiving the updates. Create a Layer 3 transit VLAN to segment the traffic between the sites.cisco. Correct Answer: B Section: [none] Explanation Explanation/Reference: 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. D. Correct Answer: C Section: [none] Explanation Explanation/Reference: 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.2_52_se/config uration/guide/swvtp. What is the problem? A. What is the root cause of the problem? A. Verify connected trunk ports. C. 1000 B. Therefore. C. Modify the spanning-tree priorities to dictate the traffic flow.com/document/11836/how-define-vlans-allowed-trunk. Reference: https://supportforums. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: The "switchport trunk allowed vlan" command will only allow the specified VLANs. ISL was unable to encapsulate more than the already permitted VLANs across the trunk. but it does not appear in plain text in the configuration. Reference: http://www. Reference: http://www. Since the question asked for the choice that is an enhancement to the STP design. After the command switchport trunk allowed vlan 10.20. and it avoids the use of the spanning tree. B. E. Instead. the method runs the pruned VLAN on trunks. the secret key from the password string is saved in the VLAN database file. the key associated with the password is saved in hexadecimal format in the running configuration. D. 1024 . VTP versions 1 and 2 propagate only VLANs 1 to 1005. it takes up to 4 hours propagate. VTP pruning removed all unused VLANs. all other existing VLANs no longer pass traffic over the trunk. Reload the VTP server. The VTP version number must be set to version 3. 20. B. C.pruned VLANs on a trunk are still part of the spanning tree.com/en/US/docs/switches/lan/catalyst3560/software/release/12. and 30) are allowed to traverse the switch trunk interface. Restart the VTP process on the new switch. you can directly configure the password secret key. VTP-pruned VLANs do not reduce the number of spanning tree port instances. If extended VLANs are configured. B. Configure manual trunk pruning between the two locations. VTP must be stopped and restarted on the server. Another switch in the domain has a higher revision number than the server. When hidden. After each update to the VTP server. Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: VTP should never need to have the switch reloaded or the VTP process to restart in order for it to work. VTP pruning is the best choice. D.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613.

com/2012/11/difference-between-vtp-versions. the application server team has indicated that they must not have the standard 30 second delay before their switchport enters a forwarding state.wikipedia. C. issue the switchport trunk vlan-list interface configuration command. VLANs 1 through 1005 are allowed on each trunk by default. the port eventually transitions into STP blocking mode. enable the STP PortFast feature. perform these steps: 1. Only VTP version 3 supports extended VLANs (1-4095). Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: The "vlan dot1q tag native" will tag all untagged frames. allowed VLAN list VTP pruning VACL L2P tunneling Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: When a trunk link is established. including control traffic. It allows control traffic to pass using the non-default VLAN. C. and neighbors on an IEEE 802 local area network. All frames within the native VLAN are tagged. D. LLDP performs functions similar to several proprietary protocols. E. Reference: https://supportforums. QUESTION 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.blogspot. 4095 F. Note: The allowed VLAN list on both the ends of the trunk link should be the same. VLAN traffic can be removed from the allowed list. The port still participates in STP. For Integrated Cisco IOS Software based switches. C. This removes specific VLANs from the allowed list. However. It removes the 4-byte dot1q tag from every frame that traverses the trunk interface(s). So if the port is to be a part of the loop.To restrict the traffic that a trunk carries. Which protocol does the network engineer configure on both devices to accomplish this? A. they require the switchport to enter a forwarding state immediately. Reference: http://cciememo. such as the Cisco Discovery Protocol (CDP). B. Rapid Spanning-Tree Spanning-Tree Timers Spanning-Tree FastPort Spanning-Tree PortFast Spanning-Tree Fast Forward Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: In order to allow immediate transition of the port into forwarding state. all of the configured VLANs are allowed to send and receive traffic across the link. For their disaster recovery feature to operate successfully. PortFast immediately transitions the port into STP forwarding mode upon linkup. Example configuration: Switch-C# configure terminal .cisco. B. B. Control traffic is tagged. so the open standard protocol must be configured. 2048 E.link QUESTION 44 For client server failover purposes. C. IRDP LLDP NDP LLTD Correct Answer: B Section: [none] Explanation Explanation/Reference: 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.com/document/11836/how-define-vlans-allowed-trunk. with the defined native VLAN. principally wired Ethernet.D. except when the native VLAN is set to 1. capabilities. Cisco Discovery Protocol is not supported. This keeps traffic from the VLANs from passing over the trunk link. Which option can be configured to accomplish this? A. B. D.html QUESTION 41 What does the command vlan dot1q tag native accomplish when configured under global configuration? A. D. 4096 Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: VTP versions 1 and 2 Supports normal VLAN numbers (1-1001). Which spanningtree feature satisfies this requirement? A. D. Reference: http://en.org/wiki/Link_Layer_Discovery_Protocol QUESTION 43 A manager tells the network engineer to permit only certain VLANs across a specific trunk interface.

dionicio. Switches with higher revision numbers does not accept the new domain name.4180 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.--------. RSTP PVST MST PVST+ RPVST+ Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Multiple Spanning Tree (MST) extends the IEEE 802. D. Example output: SW2#show spanning-tree vlan 10 VLAN0010 Spanning tree enabled protocol rstp Root ID Priority 24586 Address 0014. D.--. If the switch hears a VTP advertisement it will automatically learn the VTP domain name.Nbr Type ------------------.24 Switch-C(config-if-range)# spanning-tree portfast Reference: http://www. D. C. E. B. All other switches with the default domain name become VTP clients.-------. The network is expected to grow and add many new VLANs in the future. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: By default.com/en/US/docs/ios/lanswitch/command/reference/lsw_s2.Switch-C(config)# interface range fa0/3 .216 P2p Po23 Altn BLK 9 128. B. If all switches currently have the default VTP domain name "null". Contained in a summary advertisement: VTP version Domain name Configuration revision number Time stamp MD5 encryption hash code Reference: https://rowell.com/library/content.---.57d8.232 P2p Reference: http://www.html QUESTION 46 A new network that consists of several switches has been connected together via trunking interfaces. and the configuration revision number.Po21 Root FWD 9 128.f2d2. C. a switch will have a domain name of NULL and no password. switch# show spanning-tree vlan 10 switch# show spanning-tree bridge switch# show spanning-tree brief switch# show spanning-tree summary switch# show spanning-tree vlan 10 brief Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Command Description show spanning-tree Displays information about the spanning-tree state. The main purpose of MST is to reduce the total number of spanning-tree instances to . C.9000 Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec Aging Time 300 sec Interface Role Sts Cost Prio. B. which statement describes what happens when a domain name is configured on one of the switches? A.informit. VTP summary advertisements are sent out of all ports with the new domain name.net/configuring-cisco-vtp/ QUESTION 47 A network engineer is setting up a new switched network. E.aspx? b=CCNP_Studies_Switching&seqNum=36 QUESTION 45 Which command does a network engineer use to verify the spanning-tree status for VLAN 10? A. The switch with the non-default domain name restores back to "null" upon reboot. VLANs.--------------------------.1w RST algorithm to multiple spanning trees. Summary advertisements sent out every 300 seconds and every time a change occurs on the VLAN database. Which Spanning Tree Protocol should be used to reduce switch resources and managerial burdens that are associated with multiple spanning-tree instances? A.cisco.

VLANs--The VLAN template disables routing and supports the maximum number of unicast MAC addresses. the switch SDM templates prioritize system resources to optimize support for certain features. B. 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.pdf QUESTION 50 Which SDM template is the most appropriate for a Layer 2 switch that provides connectivity to a large number of clients? A. Reference: http://ciscodocuments. Figure 3-15 shows a common network design. PVRST+ runs STP instances for each VLAN and does not take into consideration the physical topology that might not require many different STP topologies. B. B. You can select a template to provide maximum system usage for some functions. Reference: http://www.2_55_se/config uration/guide/swsdm. D.html QUESTION 48 Which statement about the use of SDM templates in a Cisco switch is true? A.com/2011/05/chapter-03-implementing-spanning.com/en/US/docs/switches/lan/catalyst3750x_3560x/software/release/12. To allocate hardware resources for different usages. for example. VLAN default access routing Correct Answer: A .tree_19. In this setup. Rather than maintaining 1000 spanning trees. C. reducing the need for switch resources. there are 1000 VLANs. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: You can use SDM templates to configure system resources in the switch to optimize support for specific features. Figure 3-15: VLAN Load Balancing Figure 3-15 illustrates two links and 1000 VLANs. C. SDM templates are used to configure system resources in the switch to optimize support for specific features. Routing--The routing template maximizes system resources for IPv4 unicast routing.cisco. 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. C. depending on how the switch is used in the network. D. connected to two Building Distribution submodule Switches D1 and D2. Default--The default template gives balance to all functions. use the default template to balance resources. 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.blogspot. SDM templates are configured by accessing the switch using the web interface. typically required for a router or aggregator in the center of a network. each switch needs to maintain only two spanning trees. featuring an access Switch A. and use access template to obtain maximum ACL usage. on the other hand. E. uses a minimum number of STP instances to match the number of physical topologies present.cisco. Reference: http://www. It would typically be selected for a Layer 2 switch. The 1000 VLANs map to two MST instances. the switch SDM templates prioritize system resources to optimize support for certain features.match the physical topology of the network and thus reduce the CPU cycles of a switch. MST. D. depending on how the switch is used in the network. SDM templates are used to configure ACLs that protect networks and specific hosts from unnecessary or unwanted traffic. 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.pdf QUESTION 49 Which SDM template disables routing and supports the maximum number of unicast MAC addresses? A. VLAN access default routing Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: To allocate ternary content addressable memory (TCAM) resources for different usages.com/en/US/docs/switches/lan/catalyst3560/software/release/12.2_55_s e/configuration/guide/swsdm.

A new MAC address is added to the content-addressable memory. Default--The default template gives balance to all functions.mand in global configuration mode. perform this task: Command Purpose Step 1 switch# configure ter. syslog (Optional) Specifies the syslogging facility when the MAC-move notification detects the first instance of the MAC move. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: mac-address-table notification mac-move To enable MAC-move notification. To disable MAC-move notification.cisco. Entering the value 0 disables the MAC aging. the default is 300 seconds. what is the default period of time after which a MAC address ages out and is discarded? A. 100 seconds 180 seconds 300 seconds 600 seconds Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: To configure the aging time for all MAC addresses.html QUESTION 53 Which option is a possible cause for an errdisabled interface? A.Section: [none] Explanation Explanation/Reference: Explanation: To allocate ternary content addressable memory (TCAM) resources for different usages. typically required for a router or aggregator in the center of a network.com/en/US/docs/switches/lan/catalyst3560/software/release/12. 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. C. It would typically be selected for a Layer 2 switch. use the mac-address-table notification mac-move com.com/en/US/docs/ios/lanswitch/command/reference/lsw_m1. C. The range is from seconds [vlan vlan_id] 0 to 1000000. routing loop cable unplugged STP loop guard security violation Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: There are various reasons for the interface to go into errdisable.2_55_se/config uration/guide/swsdm. the aging specification applies to all VLANs. B. A MAC address or host moves between different switch ports.pdf QUESTION 51 In a Cisco switch.dress-table aging-time carded from the MAC address table. B. More than 64 MAC addresses are added to the content-addressable memory.Enters configuration mode. The reason can be: Duplex mismatch Port channel misconfiguration BPDU guard violation UniDirectional Link Detection (UDLD) condition . D. when is a syslog message generated? A.com/en/US/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/M ACAddress.html QUESTION 52 If a network engineer applies the command mac-address-table notification mac-move on a Cisco switch port. D.Specifies the time before an entry ages out and is dis. the switch SDM templates prioritize system resources to optimize support for certain features. VLANs--The VLAN template disables routing and supports the maximum number of unicast MAC addresses (clients). D. minal Step 2 switch(config)# mac-ad.cisco.cisco. Reference: http://www. A new MAC address is removed from the content-addressable memory. Reference: http://www. use the no form of this command. B. Routing--The routing template maximizes system resources for IPv4 unicast routing. Reference: http://www. C. 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. If a VLAN is not specified. Usage Guidelines MAC-move notification generates a syslog message whenever a MAC address or host moves between different switch ports.

C.cisco. LLDP-MED is an extension to LLDP that operates between routers that run BGP. Reference: http://www. Each device sends periodic advertisements to a central device that builds the network topology. B. Reference: http://www. the timeout feature is disabled.pdf QUESTION 56 Which statement about Cisco devices learning about each other through Cisco Discovery Protocol is true? A. Issue the shutdown command and then the no shutdown interface mode command on the associated interface in order to manually reenable the ports. LLDP-MED is an extension to LLDP that operates only between network devices.com/en/US/docs/switches/metro/me3400/software/release/12.cisco. and inventory management.shtml QUESTION 54 What is the default value for the errdisable recovery interval in a Cisco switch? A.shtml QUESTION 55 Which statement about LLDP-MED is true? A. 30 seconds 100 seconds 300 seconds 600 seconds Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: After you fix the root problem. cat6knative#show errdisable recovery ErrDisable Reason Timer Status ----------------. LLDP-MED is an extension to LLDP that operates only between endpoint devices. It specifically provides support for voice over IP (VoIP) applications and provides additional TLVs for capabilities discovery. In this case. C. Each device broadcasts periodic advertisements to all of its neighbors. the ports are still disabled if you have not configured errdisable recovery on the switch.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b. Correct Answer: A Section: [none] . B.Late-collision detection Link-flap detection Security violation Port Aggregation Protocol (PAgP) flap Layer 2 Tunneling Protocol (L2TP) guard DHCP snooping rate-limit Incorrect GBIC / Small Form-Factor Pluggable (SFP) module or cable Address Resolution Protocol (ARP) inspection Inline power Reference: http://www. Power over Ethernet.cisco.-------------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. B.2_58_se/configur ation/guide/swlldp. Each device sends periodic advertisements to all IP addresses in its ARP table. by default.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00806cd87b. D. Each device sends periodic advertisements to multicast address 01:00:0C:CC:CC:CC. network policy. The show errdisable recovery command shows the default error-disable recovery state for all the possible conditions. LLDP-MED is an extension to LLDP that operates between endpoint devices and network devices. you must reenable the ports manually. C. Correct Answer: A Section: [none] Explanation Explanation/Reference: 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. D. The errdisable recovery command allows you to choose the type of errors that automatically reenable the ports after a specified amount of time. D.

This fea.1Q protocol.Management-Address TLV dressTLV Allows for organizational unique TLVs Yes No Reference: . hardware platform. out each connected network interface.net/subdom/network/index. Full/Half Duplex Indicates status (duplex configuration) of CDP broadcast interface. memory errors. These multicast packets may be received by Cisco switches and other networking devices that support CDP into their connected network interface. Reference: http://www. TLV Used by network operators to diagnose connectivity problems be. LLDP does not support TLVs. hardware platform native VLAN IDs. Used by network operators to verify VTP domain configuration in adjacent network nodes. native VLAN IDs. Capabilities TLV Describes the functional capability for the device in the form of a de. Version TLV Contains information about the software release version on which the device is running. Table 21 summarizes the TLV definitions for CDP advertisements. where No Port UniDirectional the connection may be unidirectional Mode TLV Management address Management Ad. B. D. Reference: http://network. port-duplex. This information is in the form of the interface protocol and port number.com/en/US/docs/ios/12_2/configfun/configuration/guide/fcf015. Eth 1/0.php?id=cdp QUESTION 57 Which option lists the information that is contained in a Cisco Discovery Protocol advertisement? A. C.No MTU TLV port-Specifies the size of the MTU External port support-Used to identify the card No External Port-ID terminating the fiber in the case of wave. Table 21 Type-Length-Value Definitions for CDPv2 TLV Definition Device-ID TLV Identifies the device name in the form of a character string. Port-ID TLV Identifies the port on which the CDP packet is sent. IP Network Prefix Contains a list of network prefixes to which the sending device can TLV forward IP packets.Explanation Explanation/Reference: Explanation: Cisco devices send periodic CDP announcements to the multicast destination address 01-00-0c. for example. VTP Management Advertises the system's configured VTP management domain name. B. for example. LLDP can discover up to two devices per port. C. memory errors Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Type-Length-Value fields (TLVs) are blocks of information embedded in CDP advertisements. a switch. for example. Address TLV Contains a list of network addresses of both receiving and sending devices.TLV length-division multiplexing (WDM) VTP management support No VTP Management Domain TLV Port unidirectional mode-Used in fiber. CDP learns the native VLAN for an interface. LLDP can discover only Windows servers.spravcesite. port-duplex. LLDP cannot provide information about VTP. D.ture is implemented only for interfaces that support the IEEE 802. the assumed VLAN for untagged packets on the interface. Cisco 4500. Platform TLV Describes the hardware platform name of the device. per interface.tween adjacent network elements.cisco. Native VLAN TLV Indicates. memory errors native VLAN IDs. hardware platform port-duplex. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: LLDP Versus Cisco Discovery Protocol TLV Comparison Function Description LLDP TLV Cisco Discovery Protocol TLV IP network prefix support-Used to send the net.html QUESTION 58 Which option describes a limitation of LLDP? A.Domain TLV string.vice type.No IP Network Prefix work prefix and used for ODR TLV Hello piggybacking-Can be used to piggy back No Protocol Hello TLV hello messages from other protocols Maximum-transmission-unit (MTU) sup.cc-cc-cc.

capabilities. media-independent. D. 30 seconds 60 seconds 120 seconds 300 seconds Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: Cisco Discovery Protocol is a Layer 2. Advertisements supported and configured in Cisco software are sent. which indicates the length of time a receiving device should hold Cisco Discovery Protocol information before discarding it. capabilities. They also listen to messages to learn when interfaces on other devices are up or go down. E.com/en/US/docs/iosxml/ios/cdp/configuration/15-mt/nm-cdp. server . and neighbors on a local area network. CDP is enabled by default and can be disabled globally with the command no cdp run.html QUESTION 61 What is the default interval at which Cisco devices send Cisco Discovery Protocol advertisements? A.http://www. UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to monitor the physical status of links and detect unidirectional failures. UDLD can operate in either normal or aggressive mode.discover. UDLD puts the affected port into the errdisabled state and alerts the user.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/udl d. every 60 seconds. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: CDP is enabled on your router by default. D. CDP is enabled by default and can be disabled globally with the command no cdp enable. C. When a unidirectional link is detected.html QUESTION 62 Which statement about Cisco Discovery Protocol configuration on a Cisco switch is true? A. Reference: http://www. when a switch is configured to use VTP versions 1 or 2? A. and neighbors on a local area network. CDP also is enabled on supported interfaces by default. B. B. When a unidirectional link is detected. UDLD is a standardized Layer 2 protocol that enables devices to monitor the physical status of links and detect unidirectional failures. To disable CDP on an interface. directly connected devices. Reference: http://www. transparent B.html QUESTION 59 Which statement about the UDLD protocol is true? A. which means the Cisco IOS software will receive CDP information. C. UDLD detects the existence of unidirectional links. Cisco Discovery Protocol is enabled by default. UDLD detects the existence of unidirectional links. UDLD is a standardized Layer 2 protocol that enables devices to advertise their identity. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: The Cisco-proprietary UDLD protocol monitors the physical configuration of the links between devices and ports that support UDLD. by default. CDP is disabled by default and can be enabled globally with the command cdp enable. D. To disable it globally.cisco. D.html#wp10175 QUESTION 63 Which VTP mode is needed to configure an extended VLAN. Advertisements contain time-to-live information. B.cisco. UDLD is a Cisco-proprietary Layer 2 protocol that enables devices to advertise their identity. normal and aggressive active and aggressive normal and active normal and passive normal and standby Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: The Cisco-proprietary UDLD protocol monitors the physical configuration of the links between devices and ports that support UDLD. Devices discover each other by listening at that address. B.com/en/US/docs/switches/lan/catalyst6500/ios/12. UDLD puts the affected port into the errdisabled state and alerts the user.com/en/US/docs/ios/12_2/configfun/command/reference/frf015.com/en/US/technologies/tk652/tk701/technologies_white_paper0900aecd804c d46d. client C. Reference: http://www.cisco. C.cisco. use the "no cdp run" command.html QUESTION 60 Which option lists the modes that are available for configuring UDLD on a Cisco switch? A. use the "no cdp enable interface" configuration command.cisco. Reference: http://www. and network-independent protocol that networking applications use to learn about nearby. C. CDP is disabled by default and can be enabled globally with the command cdp run.2SX/configuration/guide/udl d. 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.

B. Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: VTP version 1 and version 2 support VLANs 1 to 1000 only. QUESTION 66 Refer to the exhibit. All other values may be used as VLAN identifiers. If more than one VLAN is needed. C. 0 1 2 1024 Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: A standard (non-voice VLAN port) access switch port can belong to only a single VLAN. html QUESTION 64 What is the size of the VLAN field inside an 802. VLANs in the range 1006 to 4094 are removed from VTP control. Which option shows the expected result if a show vlan command is issued? A. C.cisco. Extended VLANs are only supported in version 3 and not in versions 1 or 2. the port should be configured as a trunk port. The hexadecimal values of 0x000 and 0xFFF are reserved.org/wiki/IEEE_802.1q frame? A.D. Reference: http://www.1Q QUESTION 65 What is the maximum number of VLANs that can be assigned to an access switchport without a voice VLAN? A. D. B.wikipedia.2SX/configuration/guide/vtp. B. If converting from VTP version 3 to VTP version 2. allowing up to 4. . D.com/en/US/docs/switches/lan/catalyst6500/ios/12. Extended-range VLANs are supported only in VTP version 3. 8-bit 12-bit 16-bit 32-bit Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: The VLAN field is a 12-bit field specifying the VLAN to which the frame belongs.094 VLANs Reference: http://en.

B.wikipedia. Obviously.1q header found? A. ignoring the switchport access VLAN 10 command. C.html QUESTION 68 In which portion of the frame is the 802.1Q QUESTION 69 . Exhibit A B. D. portfast port-security spanning tree storm control Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Voice VLAN Configuration Guidelines You should configure voice VLAN on switch access ports. A. Reference: http://www. C. the Port Fast feature is not automatically disabled. within the Ethernet header within the Ethernet payload within the Ethernet FCS within the Ethernet source MAC address Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Frame format Insertion of 802. Exhibit D Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: In this case. Use the show vlan privileged EXEC command to see if the VLAN is present (listed in the display).1Q tag in an Ethernet frame 802.com/en/US/docs/switches/lan/catalyst2950/software/release/12. The voice VLAN should be present and active on the switch for the IP phone to correctly communicate on the voice VLAN. The Port Fast feature is automatically enabled when voice VLAN is configured. Exhibit C D.1_22_ea11x/co nfiguration/guide/swvoip. a port can not be both. but not automatically disabled when a voice VLAN is removed? A.C. B.cisco. When you disable voice VLAN. D. it adds a 32-bit field between the source MAC address and the EtherType/length fields of the original frame Reference: http://en. the port has been configured both as a trunk and as a switchport in data vlan 10. D.org/wiki/IEEE_802. for Ethernet frames.1Q does not encapsulate the original frame. Instead. QUESTION 67 Which feature is automatically enabled when a voice VLAN is configured. so even though Cisco IOS will accept both. Exhibit B C. the port will actually be used as a trunk.

VLANs 1-1001 VLANs 1-4094 VLANs 2-1001 VLANs 2-4094 Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: VTP pruning should only be enabled on VTP servers. D.1q.1q. Reference: http://www.cisco.21. C.php QUESTION 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. you will need to enable 802. C. Both VTP versions 1 and 2 supports pruning. . The users in an engineering department that connect to the same access switch cannot access the network. B. Update the VTP revision number.html#vtp_pruning QUESTION 71 Refer to the exhibit.Which VLAN range is eligible to be pruned when a network engineer enables VTP pruning on a switch? A.com/c/en/us/ support/docs/lan-switching/vtp/10558. Enable VTP pruning and disable 802. QUESTION 72 Refer to the exhibit. Then. Which action resolves this problem? A.orbit-computer-solutions. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Only VTP servers can add new VLANs to the switched network. The network engineer found that the engineering VLAN is missing from the database. VTP pruning port-security storm control bpdguard Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: VTP ensures that all switches in the VTP domain are aware of all VLANs. However. Change VTP mode to server and enable 802. but VLAN 1 can't be pruned because it's an administrative VLAN.1q. all the clients in the VTP domain will automatically enable VTP pruning. Reference: http://www. B. Disable VTP pruning and disable 802. there are occasions when VTP can create unnecessary traffic.1Q trunking to pass this new VLAN along to the other switches. C. All switches in the network receive all broadcasts. D. By default. All unknown unicasts and broadcasts in a VLAN are flooded over the entire VLAN. VTP pruning is a feature that you use in order to eliminate or prune this unnecessary traffic. VLANs 2 1001 are pruning eligible. D. B. 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.com/VTP-Pruning.

Which Cisco IOS switching feature can be used to achieve the task? A.1Q and ISL. Enable the company B switch with the vtp mode server command. QUESTION 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.The network switches for two companies have been connected and manually configured for the required VLANs. B. Manually force trunking with switchport mode trunk on both switches. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Cisco Discovery Protocol (CDP) version 2 passes native VLAN information between Cisco switches. Delete vlan. . PPP encapsulation with a virtual template Link Aggregation Protocol at the access layer dot1q VLAN trunking Inter-Switch Link Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Here the question asks for transporting "frames and IP traffic for different broadcast domains that are mutually isolated" which is basically a long way of saying VLANs so trunking is needed to carry VLAN information. Of these. you will see CDP error messages on the console output. but versions 1 and 2 do not. Cisco Discovery Protocol version 3 carries native VLAN information. Cisco Discovery Protocol version 1 and version 2 carry native VLAN information. C.ciscopress. Cisco Discovery Protocol version 1 carries native VLAN information. but users in company A are not able to access network resources in company B when DTP is enabled. C. but version 1 does not. D. Reference: http://www.1Q is supported by multiple vendors since ISL is a Cisco proprietary protocol. Consider that this is a multivendor environment. B. Which action resolves this problem? A. but version 2 does not. The VTP domain names do match and they are both VTP servers so there are no issues there. D. QUESTION 74 Which statement about using native VLANs to carry untagged frames is true? A. Cisco Discovery Protocol version 2 carries native VLAN information. If you have a native VLAN mismatch.asp?p=29803&seqNum=3 QUESTION 75 Refer to the exhibit. There are 2 different methods for trunking. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Since the number of existing VLANs differ on the switches (9 on A and 42 on B) we know that there is a problem with VTP or the trunking interfaces. B. 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.dat and ensure that the switch with lowest MAC address is the VTP server. 802. only 802. C. Disable DTP and document the VTP domain mismatch. D.com/articles/article.

D. The "vtp pruning" command prunes VLANs automatically. QUESTION 78 What is required for a LAN switch to support 802. Native VLAN mismatches are detected via spanning tree and Cisco Discovery Protocol (CDP).1q trunks are on both sides. D.1_13_ea1/confi guration/guide/swtunnel. VLAN spanning-tree in SW-2 is configured. 802.switches/24330-185. 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. C.html QUESTION 79 Refer to the exhibit.cisco. VTP pruning access list switchport trunk allowed VLAN VLAN access-map Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Cisco advocates the benefits of pruning VLANs in order to reduce unnecessary frame flooding. Reference: http://www. Which option is the cause of the spanning-tree error? A. Which Cisco IOS feature can be used to achieve this task? A. the trunk still remains up for other VLANs.informit. If you use 802. B. Explanation: http://www. B. Correct Answer: C Section: [none] Explanation Explanation/Reference: Here we see that the native VLAN has been configured as 2013 on one switch. not via DTP messages. Reference: http://www. spanning-tree bpdu-filter is enabled. C.com/library/content. Upgrade to VTP version 3 for advanced feature set support. D. Because the 802. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Manaully pruning the default VLAN (1) can only be done with the "switchport trunk allowed vlans remove" command. VLAN 1 is not VTP pruning eligible so it cannot be done via VTP pruning.cisco. both with native VLAN mismatch. Manually prune default VLAN with switchport trunk allowed vlans remove. C. D. however. Enable VTP pruning on the VTP server. Support less than 1500 MTU Support 1504 MTU or higher Support 1522 layer 3 IP and IPX packet Support 1547 MTU only Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: The default system MTU for traffic on Catalyst switches is 1500 bytes.aspx? b=CCNP_Studies_Switching&seqNum=25 QUESTION 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. B.com/en/US/docs/switches/lan/catalyst3550/software/release/12. If spanning tree detects a native VLAN mismatch. you must ensure that you choose a common native VLAN for each port in the trunk. .com/c/en/us/support/docs/switches/catalyst-6500-series. spanning tree blocks local native VLAN traffic and the remote switch native VLAN traffic on the trunk. C. Use trunk pruning vlan 1.A multilayer switch has been configured to send and receive encapsulated and tagged frames. VLAN ID 1 should not be used for management traffic because its unsafe.html QUESTION 77 Which action allows a network engineer to limit a default VLAN from being propagated across all trunks? A. 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. B. The "trunk pruning vlan 1" option is not a valid command. which stops the inefficient flooding of frames where they are not needed. but 1 (the default native VLAN) on the other switch.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. VLAN 2013 on the multilayer switch is configured as the native VLAN.1Q trunks.

G0/3. auto. 2. the other two bytes for tag control information (TCI). desirable. B. desirable. Only the combinations auto-desirable. 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. and on-on allow the formation of a channel. .1Q trunking. Reference: http://www. all VLAN packets are tagged on the trunk link.html QUESTION 82 Refer to the exhibit. and on. The channel is forced to remain down. desirable. it is not initiated. C. G0/2. Only the combinations active-desirable. Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: A LACP port priority is configured on each port using LACP. Only the combinations of auto-desirable. A VLAN tag adds 4 bytes to the frame. and on-on allow the formation of a channel. desirable.cisco. The formation of a channel is desired and ini.desirable. and on. C. 1. such as a router. auto: PAgP is running passively. desirable. B.switches/21041-131. LACP traffic goes through G0/4 because it is the highest interface ID. and on-on allow the formation of a channel. desirable. PAgP modes are off. Which action allows interface G0/1 to always actively forward traffic in the port-channel? A.com/c/en/us/support/docs/switches/catalyst-2900-xl-series. desirable. The formation of a channel is desired. and G0/4 between two switches using Ethernet port-channel. PAgP modes are active. B. and on-on will allow a channel to be formed. The higher the number. If a device on one side of the channel does not support PAgP. Reference: http://www. desirable-desirable. and on. LACP uses the port priority with the port number to form the port identifier. PAgP modes are active. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: PAgP modes are off. The channel is forced to come up. off: PAgP will not run. Configure LACP port-priority on G0/1 to 1. 3. desirable. auto. however.cisco. D.tiated.How many bytes are added to each frame as a result of the configuration? A. 4-bytes except the native VLAN 8-bytes except the native VLAN 4-bytes including native VLAN 8-bytes including native VLAN Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: In 802. D. and on-on allow the formation of a channel. desirable. desirable.desirable. and on. and on. Only the combinations auto-desirable. Configure G0/1 as half duplex and G0/2 as full duplex. D. desirable: PAgP is running actively. The valid range is from 1 to 65535. on: PAgP will not run. and on-on will allow a channel to be formed. active.com/c/en/us/td/docs/ios/12_2sb/feature/guide/gigeth. C.desirable. Only the combinations auto-auto. The PAgP modes are explained below. The default is 32768.desirable. PAgP modes are off. Configure LACP port-priority on G0/1 to 65535.desirable. QUESTION 80 A network engineer configured a fault-tolerance link on Gigabit Ethernet links G0/1. the lower the priority. Two bytes are used for the tag protocol identifier (TPID).html#wp1081491 QUESTION 81 Which statement about the use of PAgP link aggregation on a Cisco switch that is running Cisco IOS Software is true? A. 4. The port priority can be configured automatically or through the CLI. Only the combinations active-active. the device on the other side must have PAgP set to on. except the native VLAN.

3. the network engineer configured an EtherChannel on interfaces Fa1/0 and Fa0/1 of the server farm switch. off: PAgP will not run. auto. The Link Aggregate Control Protocol (LACP) trunking supports four modes of operation: On: The link aggregation is forced to be formed without any LACP negotiation . The formation of a channel is desired and ini. The formation of a channel is desired. Which action can the engineer take to resolve this issue? . We do not send or understand the LACP packet. . 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# However. desirable. and on. In this example. the switch neither sends the LACP packet nor processes any inbound LACP packet. 2. and fa0/15 are all in Port Channel 12. D. Only the combinations auto-desirable. Users of PC-1 experience slow connection when a webpage is requested from the server.able mode of PAgP. desirable: PAgP is running actively. Link Combination Control Protocol Port Aggregation Protocol Port Combination Protocol Link Aggregation Control Protocol Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: PAgP modes are off. which is operating in desirable mode. This is similar to the desir. however. it is not initiated. The channel is forced to come up. To increase bandwidth. This is similar to the auto mode in PAgP. 1. QUESTION 83 Refer to the exhibit. which is only a PAgP mode. Off: The link aggregation is not formed. desirable. traffic is still slow. The peer (in active state) initiates negotiation (when it sends out an LACP packet) which we receive and answer. eventually to form the aggregation channel with the peer. fa0/14. Active: We can form an aggregate link and initiate the negotiation.desirable.In other words.Which EtherChannel negotiation protocol is configured on the interface f0/13 f0/15? A. 4. auto: PAgP is running passively. and on-on will allow a channel to be formed. we see that fa 0/13. This is similar to the on state for PAgP. The channel is forced to remain down. on: PAgP will not run.tiated. Passive: The switch does not initiate the channel but does understand inbound LACP packets. C. B. This is similar to the off state for PAgP. The link aggregate is formed if the other end runs in LACP active or passive mode.

cisco. the source MAC address will always be that of PC-1. When a bundle already exists and a VLAN of a port is modified. B. If speed and duplex change when a bundle exists. The device on the other side must have PAgP set to on if a device on one side of the channel does not support PAgP. and on-on allow the formation of a channel. D. Change the load-balance method to dst-mac. Which statement describes what happens to all ports in the bundle? A. A switch can support up to 10 compatibly configured Ethernet interfaces in an EtherChannel. A switch can support up to 10 compatibly configured Ethernet interfaces in an EtherChannel.A. Disable EtherChannel load balancing. PAgP drops the ports that do not match the configuration. All interfaces in each EtherChannel must be the same speed. PAgP does not change the port speed and duplex for all ports in the bundle until the switch is rebooted. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: An EtherChannel consists of individual Fast Ethernet or Gigabit Ethernet links bundled into a single logical link. D.html QUESTION 86 Refer to the exhibit. PAgP requires that all ports in the channel belong to the same VLAN or are configured as trunk ports. PAgP does not group ports that operate at different speeds or port duplex. Each EtherChannel can consist of up to eight compatibly configured Ethernet interfaces. and since the load balancing method is source MAC. The restrictions are: PAgP does not form a bundle on ports that are configured for dynamic VLANs. PAgP modes are off. C. Contact Cisco TAC to report a bug on the switch.desirable.com/c/ en/us/support/docs/lan-switching/etherchannel/12023-4. Reference: http://www. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: PAgP aids in the automatic creation of EtherChannel links. desirable.html QUESTION 85 Which statement about using EtherChannel on Cisco IOS switches is true? A. B. PAgP changes the port speed but not the duplex for all ports in the bundle. C. The EtherChannel provides full-duplex bandwidth up to 1000 Mbps only for Fast EtherChannel or 8 Gbps only for Gigabit EtherChannel. PAgP packets are sent between EtherChannel-capable ports in order to negotiate the formation of a channel. PAgP changes the port speed and duplex for all ports in the bundle.cisco. and on. QUESTION 84 A network engineer changed the port speed and duplex setting of an existing EtherChannel bundle that uses the PAgP protocol. A switch can support up to eight compatibly configured Ethernet interfaces in an EtherChannel. Only the combinations auto-desirable. all ports in the bundle are modified to match that VLAN. traffic will only be using one of the port channel links. Reference: http://www. since the web server has two NICs traffic will be load balanced across both MAC addresses. and all must be configured as either Layer 2 or Layer 3 interfaces. D. C. The EtherChannel provides full-duplex bandwidth up to 1000 Mbps only for Fast EtherChannel or 10 Gbps only for Gigabit EtherChannel. Upgrade the switch IOS to IP services image. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Since this traffic is coming from PC-1. The EtherChannel provides full-duplex bandwidth up to 800 Mbps only for Fast EtherChannel or 8 Gbps only for Gigabit EtherChannel. . such as a router. The EtherChannel provides full-duplex bandwidth up to 800 Mbps (Fast EtherChannel) or 8 Gbps (Gigabit EtherChannel) between your switch and another switch or host.com/c/en/us/support/docs/lan-switching/etherchannel/12023-4. Some restrictions are deliberately introduced into PAgP. The load balancing method should be changed to destination MAC. PAgP changes the port speed and duplex for all ports in the bundle. auto. B. The EtherChannel provides full-duplex bandwidth up to 800 Mbps only for Fast EtherChannel or 16 Gbps only for Gigabit EtherChannel. A switch can support up to eight compatibly configured Ethernet interfaces in an EtherChannel. desirable.

known as the IST.1D BPDUs on a port and receives an RSTP BPDU after the timer has expired. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: For backward compatibility with 802. but when a RSTP switch receives an 802. Physical port Fa0/13. and Fa0/15 successfully formed a Layer 2 physical port-channel interface using a Cisco proprietary protocol. MST establishes and maintains IST. 802. . there will be the 2 defined MST instances.1D switch and starts using only 802.1d to communicate.1d BPDU and eventually the two switches run 802. B.Which statement about switch S1 is true? A. 802. QUESTION 87 What happens on a Cisco switch that runs Cisco IOS when an RSTP-configured switch receives 802. D.1d BPDU and eventually the two switches run 802. The protocol used for this port channel shows as LACP. MST maintains multiple spanning tree instances.html QUESTION 88 When two MST instances (MST 1 and MST 2) are created on a switch. D.1d BPDU. Fa0/14. and the special 0 instance. and Fa0/15 successfully formed a Layer 3 port-channel interface using a Cisco proprietary protocol. All other MST instances are numbered from 1 to 4094.1d does not understand RSTP BPDUs because they are different versions. Fa0/14. Instance 0 is a special instance for a region. in which all the spanning tree instances are independent. While this timer is active. D. Logical port Fa0/13. When a port is initialized.1d understands RSTP BPDUs because they are the same version. but when a RSTP switch receives a 802.1d understands RSTP BPDUs because they are the same version. it assumes that it is connected to an 802. but when a RSTP switch receives a 802.2SX/configuration/guide/book/spantree. it responds with an 802.1d BPDU.1D BPDU after the port migration-delay timer has expired. which is a standards based protocol.1d BPDU. but when a RSTP switch receives a 802.1d BPDU. which is Cisco proprietary. In the case for this question. CIST.1d BPDU. B. 1 2 3 4 Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Unlike other spanning tree protocols.1d does not understand RSTP BPDUs because they are different versions.cisco. 802. it does not respond with a 802. and RSTP BPDUs are sent. and the (SU) means they are in use and operating at layer 2. Fa0/14. Reference: http://www.1d to communicate. C.1D BPDUs. Logical port Fa0/13. for a total of 3 instances. and CST spanning trees: An IST is the spanning tree that runs in an MST region.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. the migrate-delay timer is started (specifies the minimum time during which RSTP BPDUs are sent). Fa0/14. and Fa0/15 successfully formed a Layer 2 port-channel interface using an open standard protocol. the switch processes all BPDUs received on that port and ignores the protocol type. Within each MST region. However. if the RSTP switch is using 802.1d BPDU and eventually the two switches run 802. C. as opposed to PAgP.1D switches. and Fa0/15 successfully formed a Layer 3 physical port-channel interface using an open standard protocol. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: These three ports show that they are in Port Channel 1. it does not respond with a 802. C. If the switch receives an 802. 802. it responds with a 802. RSTP selectively sends 802.1d to communicate.1D configuration BPDUs and TCN BPDUs on a per-port basis. Physical port Fa0/13.1d BPDU? A. what is the total number of spanning-tree instances running on the switch? A. B. it restarts the timer and starts using RSTP BPDUs on that port.

cantly reduced. f1/0 and f1/1 have the same end-to-end path cost to the designated bridge.com/en/US/docs/switches/lan/catalyst2950/software/release/12. B.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. The possible priority range is 0 through 240 (default 128). A lower path cost represents higher-speed transmission and is preferred.html QUESTION 89 Refer to the exhibit. STP considers port priority when selecting a LAN port to put into the forwarding state. Modify the spanning-tree port-priority on SW2 f1/1 to 0 and f1/0 to 16. STP puts the LAN port with the lowest LAN port number in the forwarding state and blocks other LAN ports. A CIST is a collection of the ISTs in each MST region. All MST instances within the same region share the same protocol timers.cisco. and so forth. for example. even if regions A and B are interconnected. 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.stance has its own topology parameters. Modify the spanning-tree port-priority on SW2 f1/1 to 16 and f1/0 to 0. An MST instance is local to the region. C. Reference: http://www. . By default. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: If a loop occurs.The IST is the only spanning tree instance that sends and receives BPDUs. If all LAN ports have the same priority value. Modify the spanning-tree port-priority on SW1 f1/1 to 0 and f1/0 to 16. such as root bridge ID. the number of BPDUs that need to be processed to support multiple spanning tree instances is signifi. MST instance 1 in region A is independent of MST instance 1 in region B. but each MST in. All of the other span. configurable in increments of 16.html#wp1105354 QUESTION 90 Refer to the exhibit.ning tree instance information is contained in MSTP records (Mrecords).lated within MST BPDUs. Modify the spanning-tree port-priority on SW1 f1/1 to 16 and f1/0 to 0. all VLANs are assigned to the IST. Because the MST BPDU carries information for all instances. 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. which are encapsu. Reference: http://www. root path cost.1_9_ea1/config uration/guide/swstp.2SX/configuration/guide/book/spantree. The CST interconnects the MST regions and single spanning trees. D.cisco.

lowest prevails o In this case. which option will be the new root port for VLAN 10? A. Reference: . The lower the number.19 and all ports are forwarding. it has the lowest priority value for VLAN 1. fa0/21 has the lowest cost. B.Why would the switch be considered as a root bridge? A.html#wp1020666 QUESTION 91 Refer to the exhibit. which represents the best path to the Root Bridge.lowest prevails o Local Port ID . B. The bridge priority is 1 and all ports are forwarding.cisco. Total Path Cost to root .lowest prevails o Connected Port ID (Port Priority + Port#) . the default is 32768. the range is 0 to 61440 in increments of 4096. from the direction of Root Bridge) Connected Bridge ID . interface f0/13 interface f0/14 interface f0/15 interface f0/21 Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: Root Port election on each bridge Each (non-Root) bridge has exactly one Root Port. The switch priority value is zero. The bridge priority is 128. Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: For priority. The switch priority for VLAN 1 and the macro specifies "This Bridge is the root". Considering the default cost of upstream bridges to the root bridge is equal. C. the more likely the switch will be chosen as the root switch.com/en/US/docs/switches/lan/catalyst2950/software/release/12.lowest prevails (local Root Port cost added o upon receipt of Configuration BPDUs on that port. All ports are members of VLAN 10.1_9_ea1/config uration/guide/swstp. so it will be the root port. C. D. D. Reference: http://www.

Reference: http://www. each port goes through 4 states to ensure that there are no physical loops in the layer 2 broadcast domain. bypassing the listening and learning states. it takes 30 to 60 seconds for the PC to see any activity on the network interface card. D. It is not available in VSS. The port goes into root-inconsistent state and stops forwarding traffic. learning. B. root bridge ports are all designated ports. STP PortFast causes a Layer 2 LAN interface configured as an access port to enter the forwarding state immediately.com/en/US/tech/tk389/tk621/technologies_tech_note09186a00800ae96b. follow these guidelines and restrictions: PFC3A mode does not support the mLACP for server access feature. and forwarding states.Listening . D. the port does not go through the spanning-tree listening. . Normally. Reference: http://net. BPDU data is still received in blocking state. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: When configuring mLACP for Server Access. With the initial version of spanning tree.cisco. C. C. Which Layer 2 enhancement can be used to eliminate this delay? A. Configure no switchport. D. 3. Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: The root guard ensures that the port on which root guard is enabled is the designated port. the port goes into the spanning-tree inconsistent state. Configure port duplex and speed to auto negotiation.us/Home/ethernet-and-ip/spanning-tree-protocol QUESTION 93 A network engineer configured an Ethernet switch using these commands. It is available only on a Cisco Catalyst 6500 Series chassis. If an interface is enabled for portfast receives BDPU. this process could take from 30-60 seconds. Converting a port channel to mLACP can cause a service disruption. C. the root guard enforces the position of the root bridge. 1. If the bridge receives superior STP Bridge Protocol Data Units (BPDUs) on a root guard-enabled port. VSS mode does not support the mLACP for server access feature. The port goes into loop-inconsistent state and stops forwarding traffic. learning.Forwarding . the "Spanning-tree portfast bpdufilter default" command specifies that if a BPDU is received on that port.shtml QUESTION 95 Which statement about restrictions for multichassis LACP is true? A. normal operation. root guard moves this port to a root-inconsistent STP state.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. then the default action of STP of listening. If an interface is enabled for portfast receives BDPU. The port goes into errdisabled state and stops forwarding traffic. B. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: When first powered on. 2. Converting a port channel to mLACP can cause a service disruption. the port goes through the spanning-tree listening. mLACP does not support multiple neighbors. learning. B. and forwarding states should be used.Learning . Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: STP PortFast causes a Layer 2 LAN interface configured as an access port to enter the forwarding state immediately. The port goes into BPDU-inconsistent state and stops forwarding traffic. However. These steps are outlined as follows.The switch processes BPDUs and awaits possible new information that would cause it to return to the blocking state.https://community.extremenetworks. No traffic is forwarded across this port. Switchone(config) # Spanning-tree portfast bpdufilter default Which statement about the spanning-tree portfast feature on the switch is true? A. mLACP does not support half-duplex links. In this way. STP still monitors incoming BPDUs that would indicate it should return to the blocking state to prevent a loop.A port receiving and sending data.cmed. the port is shut down immediately. This root-inconsistent state is effectively equal to a listening state. bypassing the listening and learning states. If an interface is enabled for portfast receives BDPU. No more than 100 VLANs can be active on a switch configured as a PoA. and forwarding states. If an interface is enabled for portfast receives BDPU. B. unless two or more ports of the root bridge are connected together. Configure spanning-tree portfast.A port that would cause a switching loop.com/extreme/topics/802_1d_spanning_tree_election_rules QUESTION 92 A network engineer is trying to deploy a PC on a network. The engineer observes that when the PC is connected to the network. It does not support 1Gb links. D. C. 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. Configure port to duplex full and speed 1000.Blocking . QUESTION 94 Which statement describes what happens when a port configured with root guard receives a superior BPDU? A.

Both virtual switch members cease to forward 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. 4 6 8 12 Correct Answer: C Section: [none] Explanation Explanation/Reference: 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. The new active virtual switch continues to forward traffic on all links. The new active virtual switch continues to forward traffic on all links. The VSS transitions to the dual active recovery mode. D.com/en/US/docs/switches/lan/catalyst6500/ios/12. . the VSS will transition to the dual active recovery mode. Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: In the dual active recovery mode. D.cisco. The virtual switch members reload.2SX/configuration/guide/mla cp_server_support.html QUESTION 97 Which statement describes what happens if all VSL connections between the virtual switch members are lost? A. The VSS transitions to the dual active recovery mode. The VSS detects which system was last in active state and shuts down the other switch. The switch continues to forward traffic out all links and enables spanning tree on VSL link and all other links to prevent loops. all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74 b. Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: Q. but the new active virtual switch forwards traffic on all links.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74 b. C.html QUESTION 96 What is the maximum number of 10 Gigabit Ethernet connections that can be utilized in an EtherChannel for the virtual switch link? A. all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member.cisco. All interfaces are shut down in the formerly active virtual switch member. Reference: http://www.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74 b. and both virtual switch members continue to forward traffic independently.2(33)SXI) In the dual active recovery mode. B.cisco. C. Use the console access to the existing and new switches to configure and verify correct device configuration.The DHD system priority must be lower (higher numerically) than the PoA system priority. 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. B. Reference: http://www. If for some rare reason all VSL connections are lost between the virtual switch members leaving both the virtual switch members up.cisco. and only the new active virtual switch continues to forward traffic.html QUESTION 98 Which statement describes what happens when a switch enters dual active recovery mode? A. Reference: http://www. D. Reference: http://www. What happens if all VSL connections between the virtual switch members are lost? A. The switch shuts down and waits for the VSL link to be restored before sending traffic. C.html QUESTION 99 You have been asked to install and configure a new switch in a customer network. B.

.

.

You are connecting the New_Switch to the LAN topology; the switch has been partially configured and you need to complete the rest of configuration to enable PC1
communication with PC2. Which of the configuration is correct?

A.
B.
C.
D.
E.

Option A
Option B
Option C
Option D
Option E

Correct Answer: D
Section: [none]
Explanation
Explanation/Reference:
Explanation:
Within any VTP, the VTP domain name must match. So, step one is to find the correct VTP name on the other switches. Logging in to SW1 and using the "show vtp
status" command we see this:

So we know that the VTP domain must be CCNP. This leaves only choice D and E. We also see from the topology diagram that eth 0/0 of the new switch connects
to a PC in VLNA 100, so we know that this port must be an access port in VLAN 100, leaving only choice D as correct. Note that the VTP versions supported in this
network are 1, 2, 3 so either VTP version 2 or 3 can be configured on the new switch.
QUESTION 100
You have been asked to install and configure a new switch in a customer network. Use the console access to the existing and new switches to configure and verify
correct device configuration.

By issuing the "show interface trunk" command on SW1 and SW2 we see the native VLAN is 99. G. D. For which configured VLAN are untagged frames sent over trunk between SW1 and SW2? A. C. . E. B. F. VLAN1 VLAN 99 VLAN 999 VLAN 40 VLAN 50 VLAN 200 VLAN 300 Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: The native VLAN is used for untagged frames sent along a trunk.Refer to the configuration.

QUESTION 101 You have been asked to install and configure a new switch in a customer network. Use the console access to the existing and new switches to configure and verify correct device configuration. .

.

Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: By issuing the "show vtp status command on SW2. 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. C. . Configure VLAN 500 & VLAN 600 on both SW1 & SW2 Configure VLAN 500 and VLAN 600 on SW1 only Configure VLAN 500 and VLAN 600 on SW2 only Configure VLAN 500 and VLAN 600 on SW1 . so we will need to add both VLANs to SW1 and SW2. SW2. D.You are adding new VLANs. E. but SW4 is a client. configure back to vtp server mode. B. configure vtp mode as off and configure VLAN 500 and VLAN 600. Which configuration step is valid? A.SW2 and SW4 On SW2. and SW4 we see that both SW1 and SW2 are operating in VTP server mode.

.

QUESTION 102 You have been asked to install and configure a new switch in a customer network. Use the console access to the existing and new switches to configure and verify correct device configuration. .

.

QUESTION 103 Scenario: You work for SWITCH.Examine the VTP configuration. but will need to be modified to support the addition of SwitchB. D. Disable VTP pruning on SW1 only Disable VTP pruning on SW2 only Disable VTP pruning on SW4 only Disable VTP pruning on SW2. They have just added a new switch (SwitchB) to the existing network as shown in the topology diagram. SwitchB has a minimal configuration.com. . Which of the following configuration steps will allow creating private VLANs? A. SwitchA and SwitchB use Cisco as the enable password. RouterA is currently configured correctly and is providing the routing function for devices on SwitchA and SwitchB. C. SW4 and New_Switch Disable VTP pruning on New_Switch and SW4 only. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: To create private VLANs. In this case. only SW4 will connect to servers in a private VLAN. You are required to configure private VLANs for a new server deployment connecting to the SW4 switch. SwitchA is currently configured correctly. E. you will need to only disable pruning on the switch that contains the private VLANs. You have been tasked with competing the needed configuring of SwitchA and SwitchB. B.

1.11/24 Inter-switch Connectivity Configuration Requirements • For operational and security reasons trunking should be unconditional and Vlans 1. • Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link. • 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.168. 12. 21. • SwitchA needs to be the root switch for vlans 11. All other vlans should be left are their default values. Correct Answer: Answer: Here are steps: Section: [none] Explanation Explanation/Reference: hostname SWITCH_B ! ! vlan 21 name Marketing vlan 22 name Sales vlan 23 name Engineering ! ! interface FastEthernet0/3 switchport trunk allowed vlan 1. Configuration Requirements for SwitchB • Vlan 21 o Name: Marketing o will support two servers attached to fa0/9 and fa0/10 • Vlan 22 o Name: Sales o will support two servers attached to fa0/13 and fa0/14 • Vlan 23 o Name: Engineering o 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. 22 and 23 should tagged when traversing the trunk link.Configuration Requirements for SwitchA The VTP and STP configuration modes on SwitchA should not be modified. 13. 21. • 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. This mode should be done with a non-proprietary protocol. 22 and 23. • SwitchB VTP mode needs to be the same as SwitchA.21-23 channel-protocol lacp channel-group 1 mode passive switchport mode trunk ! interface FastEthernet0/4 switchport trunk allowed vlan 1.21-23 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 .

255.255. which has a partial configuration and has been attached to RouterC as shown in the topology diagram.168.0/24 .21-23 ! interface Vlan1 ip address 192. The following subnets are available to implement this solution: – 10. Due to administrative restrictions and requirements you should not add/delete vlans or create trunk links.1 ! ! End QUESTION 104 You have been tasked with configuring multilayer SwitchC. Company policies forbid the use of static or default routing. Also SwitchC needs to be able to ping server S1.1. RouterC is correctly configured.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. All routes must be learned via EIGRP 65010 routing protocol.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 ! interface Port-channel 1 switchport mode trunk switchport trunk encapsulation dot1q spanning-tree allowed vlans 1.10.21-23 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 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. You do not have access to RouteC.1.11 255. Routed interfaces should use the lowest host on a subnet when possible. You need to configure SwitchC so that Hosts H1 and H2 can successfully ping the server S1.168. No trunking has been configured on RouterC.21-23 channel-protocol lacp channel-group 1 mode active switchport mode trunk ! interface FastEthernet0/4 switchport trunk allowed vlan 1.10.

Company policies forbid the use of static or default routing. .250.200.250. Note: Due to administrative restrictions and requirements you should not add or delete VLANs. changes VLAN port assignments or create trunks. SwitchC uses Cisco as the enable password.200.32/27 – 190.– 190. All routes must be learned via the EIGRP routing protocol. Routing must only be enabled for the specific subnets shown in the diagram.64/27 Hosts H1 and H2 are configured with the correct IP address and default gateway.

you should expect the ping to SERVER to succeed from the MLS.200.31″ and “network 190.200. and from the PCs as well. But in the exam the sim is just a flash based simulator so we should use two above commands. + Only use SwitchC for interVLAN routing without using RouterC.255.255. we can use “show run” command to verify.250.0.10.200.31″ we can use one simple command “network 190.0.65 255. we are pretty sure instead of using two commands “network 190. no neighbor relationship is formed between RouterC and SwitchC.200.200.64 0. Trunking must be established between RouterC and SwitchC. . In order to complete the lab. just for sure.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 gi0/10.250.32 0. 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 switch with SVIs for interVLAN routing. SwitchC(config-if)# ip address 10.250.0.0. C:\>ipconfig We will get the default gateways as follows: Host1: + Default gateway: 190. Click on H1 and H2 and type the “ipconfig” command to get their default gateways. even without “no auto-summary” command the network still works correctly.10.31 SwitchC(config-router)# network 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 trunking requires.255.0.200.0 is shown.64 0.0.0.255 SwitchC(config-router)# network 190.200. If you use wrong AS number.224 SwitchC(config-if)# no shutdown SwitchC(config-if)# int vlan 3 SwitchC(config-if)# ip address 190. so you will not miss within it in the exam.0/16 is not used anywhere else in this topology.10.33 Host2: + Default gateway: 190.250.31 NOTE: THE ROUTER IS CORRECTLY CONFIGURED. In fact.0 ->RouterC has used IP 10.0 0. SwitchC(config-if)# no shutdown SwitchC(config-if)# exit SwitchC(config)# int vlan 2 SwitchC(config-if)# ip address 190.200. But after finishing the configuration.250.2 255. SwitchC# configure terminal SwitchC(config)# int gi0/1 SwitchC(config-if)#no switchport -> without using this command.0.0.32 0.10.255. also don’t modify/delete any port just do the above configuration.0. gi0/11 interfaces were configured as access ports so we don’t need to configure them in this sim.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 10.200.Correct Answer: Answer: There are two ways to configure interVLAN routing in this case: Section: [none] Explanation Explanation/Reference: + Use RouterC as a “router on a stick” and SwitchC as a pure Layer2 switch.10.250.250. the simulator does not let you assign IP address on Gi0/1 interface.0.33 255. in fact it is not necessary because the network 190.10.0.255.200.0.200. Also some reports said the “no auto-summary” command can’t be used in the simulator. We should check the default gateways on H1 & H2.250.255. only the summarized network 190.0″ because it is the nature of distance vector routing protocol like EIGRP: only major networks need to be advertised. SwitchC should be configured as a Layer 3 switch (which supports ip routing function as a router).1 so this is the lowest usable IP address.

Which solution ensures that the server maintains network reachability in the future? A. B. Accounting: The last "A" is for accounting. 4. 5. This capability protects the network from certain man-in-the-middle attacks. it can also support encryption. Enable DHCP snooping on at least one VLAN. so it will primarily use RADIUS for authentication and fail over to the local user database only if the RADIUS server is unreachable. the network team is considering enabling dynamic ARP inspection alongside DHCP snooping. C. What is the solution to avoid the snooping database from being rebuilt after every device reboot? A. Reference: http://www. RADIUS or TACACS+ security servers perform authorization for specific privileges by defining attribute-value (AV) pairs. B. 3. D. Use IP Source Guard to protect the DHCP binding table entries from being lost upon rebooting.2SX/configuration/guide/sno odhcp. Enable DHCP snooping for all VLANs that are associated with the switch. D. You can use accounting to see what users do once they are authenticated and authorized. 2.techrepublic. This step ensures that database entries are restored after a restart or switchover. DHCP snooping is inactive on all VLANs. Reference: http://www.com/en/US/docs/switches/lan/catalyst6500/ios/12. A DHCP snooping database agent should be configured. Enable DHCP snooping globally. Depending on your security options. the trust state of all interfaces is untrusted. Configure a static DHCP snooping binding entry on the switch. It intercepts. D. It provides a way of collecting security information that you can use for billing. Disable DHCP snooping information option.Question Set 1 QUESTION 1 A Cisco Catalyst switch that is prone to reboots continues to rebuild the DHCP snooping database. By default.cisco.configure-it-in-the-cisco-ios/ QUESTION 3 Which command creates a login authentication method named "login" that will primarily use RADIUS and fail over to the local user database? A. Ensure that DHCP server is connected through a trusted interface. Define and configure the DHCP server. (config)# aaa authentication login default radius local (config)# aaa authentication login login radius local (config)# aaa authentication login default local radius (config)# aaa authentication login radius local Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: In the command "aaa authentication login login radius local" the second login is the name of the AAA method. C. Trust the interface that is connected to the server with the ip dhcp snooping trust command. It also lists radius first then local. Apply ip dhcp snooping trust on all interfaces with dynamic addresses.html#wp1090479 QUESTION 2 Which portion of AAA looks at what a user has access to? A. authorization authentication accounting auditing Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: AAA consists of the following three elements: Authentication: Identifies users by login and password using challenge and response methodology before the user even gains access to the network. Verify the source MAC address of all untrusted interfaces with ip dhcp snooping verify mac. Disable Option 82 for DHCP data insertion. logs. Authorization: After initial authentication. Configure the DHCP snooping database agent. with accounting. For more protection against malicious attacks. Dynamic ARP inspection ensures that only valid ARP requests and responses . E. you could get a log of when users logged in and when they logged out. Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: Dynamic ARP inspection is a security feature that validates ARP packets in a network. B. and discards ARP packets with invalid IP-to-MAC address bindings. and reporting.com/blog/data-center/what-is-aaa-and-how-do-you. C. authorization looks at what that authenticated user has access to do. For example. D. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Minimum DHCP Snooping Configuration The minimum configuration steps for the DHCP snooping feature are as follows: 1. auditing. By default. which would be specific to the individual user rights. QUESTION 4 A server with a statically assigned IP address is attached to a switch that is provisioned for DHCP snooping. In the Cisco IOS.address command. The feature is not active until you complete this step. C. you can define AAA authorization with a named list or authorization method. B.

Which option is the cause of this issue? A. The switch is configured for sdm prefer routing as the switched database management template. On untrusted interfaces. its associated MAC address.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12. A network engineer is configuring the switch for DHCP snooping and IP Source Guard.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12. E. the switch forwards the packet without any checks. An entry in this table has an IP address. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: When you enable both IP Source Guard and Port Security. or the client is not assigned an IP address. 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. but is unable to configure ip verify source under several of the interfaces. IP traffic is filtered based on the source IP and MAC addresses.are relayed. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: You must configure VTP to transparent mode before you can create a private VLAN.cisco. DHCP snooping must be enabled on all VLANs. The IP address of one of the workstations does not match any entries found in the DHCP binding database. Traffic will pass accordingly after the new IP address is populated into the binding database. using the ip verify source port. D. Which option is the cause of the problem? A. The packets originating from the workstation are assumed to be spoofed and will be discarded. The configured SVIs on the switch have been removed for the associated interfaces. or with source IP and MAC address filtering. Which statement describes the outcome of this scenario? A. configure a static DHCP snooping binding entry on the switch. Configure VTP Transparent Mode.security interface configuration command. 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. To ensure network reachability to the server.cisco. C. B. there are two caveats: The DHCP server must support option 82. Static DHCP bindings are not configured on the switch. When IP source guard is enabled with this option. When IP source guard is enabled with this option. The DHCP server does not support information option 82. Which configuration must be made before the private VLAN is configured? A. If there is no match. 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.html#wp1069615 QUESTION 8 A switch is added into the production network to increase port capacity. The switch forwards traffic only when the source IP and MAC addresses match an entry in the IP source binding table.switches/72846-layer2-secftrs-catl3fixed. C. B. If the ARP packet is received on a trusted interface. The switch uses the IP source binding table only when IP source guard is enabled. even if they are not utilized for dynamic address allocation. No VLANs exist on the switch and/or the switch is configured in VTP transparent mode. Reference: http://www.asp?p=29803&seqNum=6 QUESTION 6 DHCP snooping and IP Source Guard have been configured on a switch that connects to several client workstations. B. The interfaces are configured as Layer 3 using the no switchport command. Reference: http://www. Reference: http://www. The MAC address of the DHCP client is learned as a secure address only when the switch receives non-DHCP data traffic. The interface that is connected to the workstation in question will be put into the errdisabled state. The local DHCP server is disabled prior to enabling IP Source Guard. C. D. Enable VTP version 3. D.2_55_se/configuration/guide/scg3750/swdynarp. The DHCP client interfaces have storm control configured. 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.ciscopress. You can configure IP source guard with source IP address filtering. and its associated VLAN number. Private VLANs also carry TLVs that are not known to all types of Cisco switches. Reference: http://www. the switch forwards the packet only if it is valid. Correct Answer: B Section: [none] Explanation .cisco. Packets from the workstation will be rate limited according to the default values set on the switch. Ensure all switches are configured as VTP server mode. 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. Disable VTP and manually assign VLANs. clients are not receiving an IP address via the DHCP server. the DHCP snooping binding database. B.com/articles/ article.html QUESTION 5 A network engineer wants to ensure Layer 2 isolation of customer traffic using a private VLAN.com/c/en/us/support/docs/switches/catalyst-3750-series.2_25_see/configuration/guide/3550SCG/ swdhcp82. Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: The IP source binding table has bindings that are learned by DHCP snooping or are manually configured (static IP source bindings). However.html#ipsourceguard QUESTION 7 A DHCP configured router is connected directly to a switch that has been provisioned with DHCP snooping. D. IP traffic is filtered based on the source IP address. C. the packets are assumed to be spoofed and will be discarded. The MAC address in the DHCP packet is not learned as a secure address.

including access and trunk ports. The range is 0. You can enable IP source guard when DHCP snooping is enabled on an untrusted interface. specify the falling threshold level as a percentage (up to two decimal places) of the bandwidth. After IP source guard is enabled on an interface. E. Reference: http://www. B. B.Configure broadcast. specify the rising threshold level for broadcast. The range is 0. They decide to configure the network to automate the process of re-enabling user ports. Layer 2 interfaces by filtering traffic based on the DHCP snooping binding database and on manually configured IP source bindings. C. the broadcast keyword was used so only broadcast traffic is limited.) A. 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 .fault.00.com/c/en/us/td/docs/switches/lan/catalyst4500/12. C. and its associated VLAN number. multicast.00. cast} level {level [levThe keywords have these meanings: el-low] | pps pps [ppslow]} For level. The switch uses the IP source binding table only when IP source guard is enabled.Explanation/Reference: Explanation: IP source guard is a security feature that restricts IP traffic on nonrouted. Reference: http://www.2/53SG/configuration/config/port_sec.html#wp1069615 QUESTION 9 The command storm-control broadcast level 75 65 is configured under the switch port connected to the corporate mail server. or unicast storm control. Which command accomplishes this task? A. the switch blocks all IP traffic received on the interface.html QUESTION 10 After port security is deployed throughout an enterprise campus. (Optional) For level-low.cisco. except for DHCP packets allowed by DHCP snooping. In which three ways does this command impact the traffic? (Choose three.) A.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12. If a port is in per-VLAN errdisable mode. the network team has been overwhelmed with port reset requests. If you do not configure a falling suppression level. including the switch port that the particular host is using. IP source guard is supported only on Layer 2 ports. 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. The switchport is disabled when unicast traffic reaches 75% of the total interface bandwidth. F. it is set to the rising suppression level. B. This value must be less than or equal to the rising suppression value. The port forwards traffic when traffic drops below this level. This is the default mode. D.2_25_see/configuration/guide/3550SCG/ swdhcp82. 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. You can use IP source guard to prevent traffic attacks caused when a host tries to use the IP address of its neighbor.00 to 100. The port blocks traffic when the rising threshold is reached. E. By de. D. SNMP traps are sent by default when broadcast traffic reaches 65% of the lower-level threshold. The switch drops broadcasts when they reach 75% of bandwidth. The port ACL allows only IP traffic with a source IP address in the IP source binding table and denies all other traffic. switch# show mac address-table switch# show port-security switch# show ip verify source switch# show ip arp inspection switch# show mac address-table address <mac address> Correct Answer: AE Section: [none] Explanation Explanation/Reference: Explanation: These two commands will show the MAC address table. its associated MAC address. Correct Answer: CDF Section: [none] Explanation Explanation/Reference: Explanation: storm-control {broad.00 to 100. An entry in this table has an IP address. Reference: http://www. You can configure IP source guard with source IP address filtering or with source IP and MAC address filtering.pdf QUESTION 11 The network monitoring application alerts a network engineer of a client PC that is acting as a rogue DHCP server. you can also use clear errdisable interface name vlan range command to re-enable the VLAN on the port. A port access control list (ACL) is applied to the interface. E. switch(config)# errdisable recovery interval 180 switch(config)# errdisable recovery cause psecure-violation switch(config)# switchport port-security protect switch(config)# switchport port-security aging type inactivity switch(config)# errdisable recovery cause security-violation Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: When a secure port is in the error-disabled state. D. Multicast traffic is dropped at 65% and broadcast traffic is dropped at 75% of the total interface bandwidth. 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). storm control is disabled.cisco. Which two commands help trace this PC when the MAC address is known? (Choose two.cisco. Only broadcast traffic is limited by this particular storm control configuration. In this case.com/c/en/us/td/docs/switches/lan/catalyst3550/ software/release/12.cast | multicast | uni. C. The switch resumes forwarding broadcasts when they are below 65% of bandwidth. multicast.2_25_see/configuration/guide/3550SCG/swtrafc.

When you create a named method list.7b00. D. Method lists enable you to designate one or more security protocols to be used for authorization. SLIP. AAA features are not available for use until you enable AAA globally by issuing the aaa new-model command.System Self Addresses Count: 41 Total MAC addresses: 50 Non-static Address Table: Destination Address Address Type VLAN Destination Port ------------------. Command authorization attempts authorization for all EXEC mode commands. D. including global configuration commands. You can also set the switch to shut down the port when the rising threshold is reached.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. C. creating excessive traffic and degrading network performance.0010. Reference: http://www.ht ml QUESTION 14 Which AAA Authorization type includes PPP. and ARAP connections? A. Commands--Applies to the EXEC mode commands a user issues.com/c/en/us/td/docs/ios/12_2/security/configuration/guide/fsecur_c/scfathen. a network engineer discovered an unusually high level of broadcast traffic coming from one of the switch interfaces. B. By default. D.1x? A. Reference: http://www. ·Network--Applies to network connections. associated with a specific privilege level. Reference: http://www.e289 Dynamic 1 FastEthernet0/1 0010. For detailed information on the authentication proxy feature.-------------------.html QUESTION 13 Which command globally enables AAA on a device? A. A LAN storm occurs when packets flood the LAN.cisco.com/c/en/us/td/docs/switches/lan/catalyst2950/software/release/12. C. unicast. mistakes in network configuration. thus ensuring a backup system in case the initial method fails.-----------. multicast. aaa new-model aaa authentication aaa authorization aaa accounting Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: To configure AAA authentication. RADIUS with EAP Extension TACACS+ RADIUS with CoA RADIUS using VSA Correct Answer: A . B.1540 Dynamic 2 FastEthernet0/5 0010.cisco.ht ml QUESTION 15 Which authentication service is needed to configure 802. Cisco IOS software uses the first method listed to authorize users for specific network services. B. enable AAA by using the aaa new-model global configuration command. B. Reverse Access--Applies to reverse Telnet sessions. storm control is disabled. refer to the chapter "Configuring Authentication Proxy" in the "Traffic Filtering and Firewalls" part of this book.7b00. This can include a PPP. Storm control uses rising and falling thresholds to block and then restore the forwarding of broadcast. SLIP. This process continues until there is successful communication with a listed authorization method.cisco. C. or ARAP connection. D. Storm control is configured for the switch as a whole but operates on a per-port basis. storm control SDM routing Cisco IOS parser integrated routing and bridging Dynamic ARP Inspection Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Storm control prevents traffic on a LAN from being disrupted by a broadcast. Errors in the protocol-stack implementation. in sequence. or users issuing a denial-of-service attack can cause a storm. C. EXEC--Applies to the attributes associated with a user EXEC terminal session. you are defining a particular list of authorization methods for the indicated authorization type. or unicast storm on a port. E.1545 Dynamic 2 FastEthernet0/5 QUESTION 12 While troubleshooting a network outage. A method list is simply a named list describing the authorization methods to be queried (such as RADIUS or TACACS+).0de0.---. the Cisco IOS software selects the next method listed in the method list. network IP mobile EXEC auth-proxy Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Method lists for authorization define the ways that authorization will be performed and the sequence in which these methods will be performed. or all methods defined are exhausted. Which option decreases consumption of bandwidth used by broadcast traffic? A. or multicast packets. if that method fails to respond.1_22ea/SCG/scg/swtrafc.

untrusted hosts with leased IP addresses trusted hosts with leased IP addresses untrusted hosts with available IP addresses trusted hosts with available IP addresses . if that fails use the line password.1x. Reference: http://www." The AAA default login preference is stated in order from first to last. C. B. When a network administrator is attempting an SSH connection to the device. D. local username Line password. the authentication server--performs the actual authentication of the client. Which login credentials are required when connecting to the console port in this output? A. QUESTION 17 Refer to the exhibit. C. B. B. D. D.com/c/en/us/td/docs/switches/lan/catalyst2940/software/release/12. so here the "aaa authentication login default group radius local line" means to use RADIUS first. local username. C. then if that fails use the local user database. where the configured authentication method is named "default. None means no authentication.Section: [none] Explanation Explanation/Reference: Explanation: With 802. QUESTION 18 Which type of information does the DHCP snooping binding database contain? A. line password RADIUS server. The Remote Authentication Dial-In User Service (RADIUS) security system with Extensible Authentication Protocol (EAP) extensions is the only supported authentication server. in which order does the device check the login credentials? A. RADIUS server Line password. Finally. local username Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: SSH sessions use the vty lines. meaning that credentials are not required and all sessions are allowed access immediately. RADIUS server. the authentication service is transparent to the client. The authentication server validates the identity of the client and notifies the switch whether or not the client is authorized to access the LAN and switch services.cisco. local username.1_19_ea1/configuration/guide/2940scg_1/sw8021x. RADIUS server. which lists none as the authentication method. none required username cisco with password cisco no username with password linepass login authentication default Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Here the console has been configured with the NO_AUTH name. line password. Because the switch acts as the proxy.pdf QUESTION 16 Refer to the exhibit.

You may want to do this for load-balancing or redundancy purposes. Isolated--An isolated port is a host port that belongs to an isolated secondary VLAN. The DHCP snooping feature performs the following activities: Validates DHCP messages received from untrusted sources and filters out invalid messages. including the community and isolated host ports.pdf QUESTION 19 Which switch feature determines validity based on IP-to-MAC address bindings that are stored in a trusted database? A. These interfaces are isolated from all other interfaces in other communities and from all isolated ports within the private VLAN domain. Reference: http:// www. Private VLANs block all traffic to isolated ports except traffic from promiscuous ports. including the community and isolated host ports? A. This database is built by DHCP snooping if DHCP snooping is enabled on the VLANs and on the switch. The promiscuous port can communicate with all interfaces. This port has complete isolation from other ports within the same private VLAN domain. If a Layer 2 LAN port is connected to a DHCP client. Community--A community port is a host port that belongs to a community secondary VLAN.cisco. C.html QUESTION 22 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. B. except that it can communicate with associated promiscuous ports. Reference: http://www. promiscuous port isolated port community port trunk port Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: The types of private VLAN ports are as follows: Promiscuous--A promiscuous port belongs to the primary VLAN.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. If a Layer 2 LAN port is connected to a DHCP server.html QUESTION 21 Which private VLAN access port belongs to the primary VLAN and can communicate with all interfaces. C. C. · Builds and maintains the DHCP snooping binding database.com/c/en/us/support/docs/switches/catalyst-3750-series. the switch forwards the packet without any checks. the DHCP snooping binding database. D. Each promiscuous port can have several secondary VLANs. and enable DHCP globally on the switch.Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: DHCP snooping is a security feature that acts like a firewall between untrusted hosts and trusted DHCP servers. ip dhcp snooping trust ip dhcp snooping ip dhcp trust ip dhcp snooping information Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: When configuring DHCP snooping. Before globally enabling DHCP snooping on the switch.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12.html QUESTION 20 Which command is needed to enable DHCP snooping if a switchport is connected to a DHCP server? A.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/ CLIConfigurationGuide/PrivateVLANs. which contains information about untrusted hosts with leased IP addresses. follow these guidelines: DHCP snooping is not active until you enable the feature on at least one VLAN.switches/72846-layer2-secftrs-catl3fixed.2SX/configuration/guide/book/snoodhcp. Dynamic ARP Inspection storm control VTP pruning DHCP snooping Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Dynamic ARP inspection determines the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a trusted database. configure the port as untrusted by entering the no ip dhcp snooping trust interface configuration command. Rate-limits DHCP traffic from trusted and untrusted sources. that belong to those secondary VLANs associated to the promiscuous port and associated with the primary VLAN. B. B. Reference: http://www. You can also have secondary VLANs that are not associated to any promiscuous port. Utilizes the DHCP snooping binding database to validate subsequent requests from untrusted hosts. On untrusted interfaces.2SX/configuration/guide/book/snoodhcp. or no secondary VLANs. make sure that the devices acting as the DHCP server and the DHCP relay agent are configured and enabled. as long as the promiscuous port and secondary VLANs are within the same primary VLAN.cisco.cisco. You can have more than one isolated port in a specified isolated VLAN. the switch forwards the packet only if it is valid. Traffic received from an isolated port is forwarded only to promiscuous ports. If the ARP packet is received on a trusted interface. configure the port as trusted by entering the "ip dhcp snooping trust" interface configuration command. D. Each port is completely isolated from all other ports in the isolated VLAN. D. Reference: http://www.cisco. associated to that port. isolated VLAN . Community ports communicate with other ports in the same community VLAN and with associated promiscuous ports. You can associate a secondary VLAN to more than one promiscuous port. You can have several promiscuous ports in a primary VLAN.

the source IP address filter is applied on all the VLANs. storm control port security VTP pruning VLAN trunking Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: A traffic storm occurs when packets flood the LAN. D. B. 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.pdf QUESTION 26 Which command would a network engineer apply to error-disable a switchport when a packet. B. this error message appears: Static IP source binding can only be configured on switch port. C. and to other promiscuous ports. Isolated.html QUESTION 23 Which database is used to determine the validity of an ARP packet based on a valid IP-to-MAC address binding? A.com/c/en/us/td/docs/routers/7600/ios/122SR/configuration/guide/swcg/do s. If you enter the ip source binding mac-address vlan vlan-id ip-address interface interface-id global configuration command on a routed interface.The primary VLAN carries traffic from the promiscuous ports to the host ports. The traffic storm control feature prevents LAN ports from being disrupted by a broadcast.com/c/en/us/td/docs/switches/lan/catalyst2960x/ software/15. DHCP snooping database dynamic ARP database dynamic routing database static ARP database Correct Answer: A Section: [none] Explanation Explanation/Reference: 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. D. or unicast traffic storm on physical interfaces from either mistakes in network configurations or from users issuing a DoS attack. DHCP snooping storm control spanning-tree portfast private VLAN Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: IP Source Guard Configuration Guidelines You can configure static IP bindings only on nonrouted ports.cisco. and the traffic from each isolated port also remains completely separate.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. B. C. You can configure multiple isolated VLANs in a private VLAN domain.1x port-based authentication is enabled. When IP source guard with source IP filtering is enabled on an interface. Isolated VLAN --An isolated VLAN is a secondary VLAN that carries unidirectional traffic upstream from the hosts toward the promiscuous ports. Reference:http://3c3cc. You can enable this feature when 802.html QUESTION 25 Which switch feature prevents traffic on a LAN from being overwhelmed by continuous multicast or broadcast traffic? A. and Community Private VLANs Primary VLANs and the two types of secondary VLANs (isolated and community) have these characteristics: Primary VLAN-. If you are enabling IP source guard on a trunk interface with multiple VLANs and DHCP snooping is enabled on all the VLANs. Reference: http://www. It may also contain static entries that you have created.cisco. which feature must be enabled on the access VLAN for that interface? A. multicast. This database is built by DHCP snooping when it is enabled on the VLANs and on the device. D. but these ports cannot communicate with ports in any other community or isolated VLAN in the private VLAN. Verifies that a packet has a valid IP-to-MAC address binding before updating the ARP cache or forwarding the packet. Reference: http://www. The ports within one community can communicate. Reference: http://www. C. Drops invalid ARP packets. which creates excessive traffic and degrades network performance.html QUESTION 24 When IP Source Guard with source IP filtering is enabled on an interface.cisco. DHCP snooping must be enabled on the access VLAN for that interface. primary VLAN C.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/ CLIConfigurationGuide/PrivateVLANs. You can configure multiple community VLANs in a private VLAN domain. community VLAN D.x_cg_chapter_01110. DAI can determine the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a DHCP snooping binding database. both isolated and community.storm is detected? .0_2_EX/security/configuration_guide/b_sec_152ex_2960-x_cg/b_sec_152ex_2960.B. all the traffic remains isolated within each one. Each isolated VLAN can have several isolated ports. promiscuous VLAN Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Understanding Primary.

Trunk ports--You can configure port security on interfaces that you have configured as Layer 2 trunk ports. .1x to secure the IP address that port security authenticates.2/25ew/configuration/guide/conf/port_sec. port security applies only to the access VLAN.com/c/en/us/td/docs/switches/lan/catalyst4500/12. Reference: http://www. It allows 802.com/c/en/us/td/docs/switches/datacenter/sw/4_1/nx.1X is already preventing inbound traffic on the interface from unknown MAC addresses.cisco.cisco.1x authenticates. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: 802. 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. stored in the address table. The device allows VLAN maximums only for VLANs associated with the trunk port. D. D.1X and Port Security You can configure port security and 802.cisco. These can be dynamically learned or manually configured. SPAN ports--You can configure port security on SPAN source ports but not on SPAN destination ports. If these addresses are saved in the configuration file.A. the interface does not need to dynamically relearn them when the switch restarts. D. stored in the address table. B.html QUESTION 28 Which feature describes MAC addresses that are dynamically learned or manually configured. It allows 802. B. It allows port security to secure the MAC address that 802.1x on the same interface. VLAN maximums are not useful for access ports. Reference: http://www. · Use the error disable detection and recovery feature.1x to secure the MAC address that port security authenticates. C. C. D. slot/port} | {port-channel number}} Step 2 Router(config-if)# storm-control (Optional) Configures traffic storm control to action shutdown error-disable ports when a traffic storm occurs.pdf QUESTION 29 On which interface can port security be configured? A. perform this task: Command Purpose Step 1 Router(config)# interface {{type1 Selects an interface to configure. It allows port security to secure the IP address that 802. it is not recommended. router(config-if)#storm-control action shutdown router(config-if)#storm-control action trap router(config-if)#storm-control action error router(config-if)#storm-control action enable Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Configuring the Traffic Storm Control Shutdown Mode To configure the traffic storm control shutdown mode on an interface. Although sticky secure addresses can be manually configured. B. and added to the running configuration. · Enter the no storm-control action shutdown command to revert to the default action (drop). Port security secures the MAC addresses that 802. 802. so when you enable both on an interface. C. or the shutdown and no shutdown commands to reenable ports.os/security/configuration/guide/sec_nx-os-cfg/sec_portsec.html QUESTION 27 A network engineer configures port security and 802.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. you can configure MAC addresses to be sticky. static trunk ports destination port for SPAN EtherChannel port group dynamic access point Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Port Security and Port Types You can configure port security only on Layer 2 interfaces. C. and added to the running configuration? A.1X authenticates. Reference: http://www. sticky dynamic static secure Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: With port security. On an access port.1X processes packets before port security processes them.1X on the same interfaces.2SX/configuration/guide/book/storm. Which option describes what this configuration allows? A.1x authenticates. B. 802.

o Community Port (C-Port): Connects to the regular host that resides on community VLAN. Host port further divides in two types Isolated port (I-Port) and Community port (C-port). 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.html QUESTION 30 When you configure private VLANs on a switch.wikipedia. D.46 · Radius key: rad123 · Authentication should be implemented as close to the host as possible. Host Ports: o Isolated Port (I-Port): Connects to the regular host that resides on isolated VLAN. The topology diagram indicates their layer 2 mapping. Host port further divides in two types Isolated port (I-Port) and Community port (C-port). You must use the available IOS switch features. o Community Port (C-Port): Connects to the regular host that resides on community VLAN. In other words.cisco. For security reasons. promiscuous community isolated trunked Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port. Promiscuous port (P-Port): The switch port connects to a router. it is a type of a port that is allowed to send and receive frames from any other port on the VLAN. Promiscuous port (P-Port): The switch port connects to a router. This port can communicate with anything else connected to the primary or any secondary VLAN.org/wiki/Private_VLAN QUESTION 32 SIMULATION SWITCH. DSW1 and ASW1. Reference: http://en. This port communicates with P-Ports and ports on the same community VLAN.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches. it is a type of a port that is allowed to send and receive frames from any other port on the VLAN.com/c/en/us/td/docs/switches/datacenter/sw/4_1/ nx. . Reference: http://www. promiscuous port isolated port community port access port Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: There are mainly two types of ports in a Private VLAN: Promiscuous port (P-Port) and Host port. This port communicates only with P-Ports.120.120. D.120.os/security/configuration/guide/sec_nx-os-cfg/sec_portsec. This port can communicate with anything else connected to the primary or any secondary VLAN. which type of port must you configure the gateway router port as? A. · Packets from devices in the subnet of 172. firewall or other common gateway device.0/24. You have been tasked with implementing the above access control as a pre-condition to installing the servers. This port communicates with P-Ports and ports on the same community VLAN. which port type connects the switch to the gateway router? A. C. · Filtering should be implemented as close to the serverfarm as possible. B.org/wiki/Private_VLAN QUESTION 31 When you configure a private VLAN. · Packets from devices in any other address range should be dropped on VLAN 20.40. Reference: http://en. · Devices on VLAN 20 are restricted to the subnet of 172.40.0/24 should be allowed on VLAN 20. Corporate polices do not allow layer 3 functionality to be enabled on the switches. firewall or other common gateway device. The Radius server and application servers will be installed at a future date. Authentication is to be done via a Radius server: · Radius server host: 172.Ethernet Port Channels--Port security is not supported on Ethernet port channels. In other words. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server.40. Host Ports: o Isolated Port (I-Port): Connects to the regular host that resides on isolated VLAN. B. This port communicates only with P-Ports.wikipedia. C.

Correct Answer: . D. B. C.A.

• Devices on VLAN 20 are restricted to the subnet of 172.40. You must use the available IOS switch features.Section: [none] Explanation Explanation/Reference: Answer: The configuration: Step1: Console to ASW1 from PC console 1 ASW1(config)#aaa new-model ASW1(config)#radius-server host 172. DSW1 and ASW1. You have been tasked with implementing the above access control as a pre-condition to installing the servers.0/24.40.0.46 • Radius key: rad123 • Authentication should be implemented as close to the host as possible.39. • Packets from devices in the subnet of 172.120. For security reasons. • Packets from devices in any other address range should be dropped on VLAN 20. 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. • Filtering should be implemented as close to the serverfarm as possible. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server.40.46 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. Corporate polices do not allow layer 3 functionality to be enabled on the switches. The topology diagram indicates their layer 2 mapping. . The Radius server and application servers will be installed at a future date.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 QUESTION 33 SWITCH.120.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches.120.0/24 should be allowed on VLAN 20.0.40.0 0. Authentication is to be done via a Radius server: • Radius server host: 172.120.

120.Correct Answer: Answer: The configuration: Section: [none] Explanation Explanation/Reference: Step1: Console to ASW1 from PC console 1 ASW1(config)#aaa new-model ASW1(config)#radius-server host 172.39.46 key rad123 ASW1(config)#aaa authentication dot1x default group radius ASW1(config)#dot1x system-auth-control .

120.0.255 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 .40.ASW1(config)#inter fastEthernet 0/1 ASW1(config-if)#switchport mode access ASW1(config-if)#dot1x port-control auto ASW1(config-if)#exit ASW1#copy run start Step2: Console to DSW1 from PC console 2 DSW1(config)#ip access-list standard 10 DSW1(config-ext-nacl)#permit 172.0 0.0.

html#wp1044327 QUESTION 3 Which option is a benefit of using VSS? A.cisco.Question Set 1 QUESTION 1 Which configuration command ties the router hot standby priority to the availability of its interfaces? A. (Optional) preempt--Select so that when the local router has a higher priority than the active router. reduces cost simplifies configuration provides two independent supervisors with two different control planes removes the need for a First Hop Redundancy Protocol Correct Answer: D Section: [none] Explanation Explanation/Reference: 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.pone taking over the active role for the shown number of sec. The VSS system creates a single logical router at Layer 3. For each interface configured for hot standby. D. The range is 0 to 36000 (1 hour). the default is 0 (no de. (Optional) delay--Set to cause the local router to post. B. D.html QUESTION 2 What is the default HSRP priority? A.1_19_ea1/confi guration/guide/swhsrp. C. FHRPs allow two (or more) distinct routers to share a common IP address providing a redundant Layer-3 default gateway for end nodes. This VSS routing instance fulfills this first-hop role without the need for a dedicated protocol. the hot standby priority on the device on which tracking has been configured decreases by 10.onds.Set a priority value used in choosing the active router. standby group standby priority backup interface standby track Correct Answer: D Section: [none] Explanation Explanation/Reference: 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. the default priority is 100. Reference: http://www. C.html QUESTION 4 Which First Hop Redundancy Protocol is an IEEE Standard? A. GLBP HSRP VRRP OSPF Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: A comparison of the three First Hop Redundancy Protocols are listed below: GLBP HSRP VRRP .1_19_ea1/confi guration/guide/swhsrp. Use the no form of the command to restore the default values. you can configure a separate list of interfaces to be tracked.lay before taking over). B. C. B. 50 100 120 1024 Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: standby [group-num. The highest [preempt [delay delay]] number represents the highest priority.com/en/US/docs/solutions/Enterprise/Data_Center/vssdc_integrate. Reference: http://www. D.com/en/US/docs/switches/lan/catalyst3550/software/release/12.com/en/US/docs/switches/lan/catalyst3550/software/release/12. it assumes control as the active router. its state changes do not affect the hot standby priority of the configured device. The VSS IP route is highly available due to MEC and the resiliency of the VSS system. C. The ber] priority priority range is 1 to 255.cisco.cisco. D. B. When a tracked interface fails. (Optional) group-number--The group number to which the command applies. If an interface is not tracked. Reference: http://www. VSS eliminates the need for FHRP at the aggregation layer of the data center.

up to Router role 1024 virtual routers (GLBP groups) per physical interface.(generally through ing..(generally through through ARP DHCP) DHCP) requesting a unique virtual gateway.Can use real router . routers.1 or Virtual Foror more backup more listening warder) passing routers.0..group per inpendent algoterface/SVI/routed terface/SVI/routed rithm.1 master router. ority become master.102-udp 1985 (version2) Advertisement 1 Hello 3 secHello 3 seconds second onds (Master Down InterTimers val)3 * Advertisement (Hold) 10 sec+ skew time (Hold) 10 seconds onds (Skew time)(256-priority) / 256 Load-balancing orientedWeighted algo.comparison-2/ . the .Host-degroup per in.0. one with highest pri.Multiple HSRP . int.Protocol (Gateway Load (Hot Standby Router (Virtual Redundancy Features Balancing Proprotocol) Router Protocol) tocol) .com/2008/08/23/router-high-availability-protocol. .up to 4 AVF routers on the .0.0.wordpress. traffic.102 udp (version1) 3222 224.Use virtual ip ad. .address. Cisco propriScope Cisco proprietary IEEE standard etary Active Virtual Active Router: Master Router: (*) Gateway: 1-Highest Priority 1-Highest Priority 1-Highest PriElection 2-Highest IP 2-Highest IP ority (tiebreaker) (tiebreaker) 2-Highest IP (tiebreaker) Tracking yes yes yes Optimization Preempt yes yes yes features Timer adyes yes yes justments Traffic type 224.ip address.0.1 AVG (Active Virtual Gateway). Reference: http://cciethebeginning.Round-Robin algorithm (default).Multiple VRRP rithm.1 standby router.0.Use virtual ip dress..optimal load-balancalgorithm ing.2 udp 1985 224. Load-balancing functionalClients are ity transparently updated with Requires appropriate Requires appropriate virtual MAC distribution of Virtual distribution of Virtual according to GW IP per Clients for GW IP per Clients for load-balancing optimal load-balanc.0. if not.1 active router.0..18 IP 112 224.1 group (Active .. int..

D. Each gateway assumes responsibility for forwarding packets sent to the virtual MAC address assigned to it by the AVG. B.html QUESTION 6 What is the maximum number of virtual MAC addresses that GLBP allows per group? A. B. It may participate in one or more virtual routers. B. The AVG is responsible for answering Address Resolution Protocol (ARP) requests for the virtual IP address. Virtual Router An abstract object managed by VRRP that acts as a default router for hosts on a shared LAN. Reference: http://www. .com/en/US/docs/switches/lan/catalyst3550/software/release/12. These gateways are known as active virtual forwarders (AVFs) for their virtual MAC address. D. the hot standby priority on the device on which tracking has been configured decreases by 10. The AVG assigns a virtual MAC address to each member of the GLBP group. A virtual forwarder that is assigned a virtual MAC address by the AVG is known as a primary virtual forwarder.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp. Other group members provide backup for the AVG in the event that the AVG becomes unavailable. 1 5 10 15 Correct Answer: C Section: [none] Explanation Explanation/Reference: 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. D. For each interface configured for hot standby. you can configure a separate list of interfaces to be tracked. Other group members request a virtual MAC address after they discover the AVG through hello messages.cisco. If an interface is not tracked.cisco. Reference: http://www. its state changes do not affect the hot standby priority of the configured device. A virtual forwarder that has learned the virtual MAC address is referred to as a secondary virtual forwarder. C. C. C.html QUESTION 8 Which VRRP router is responsible for forwarding packets that are sent to the IP addresses of the virtual router? A. Load sharing is achieved by the AVG replying to the ARP requests with different virtual MAC addresses. It consists of a Virtual Router Identifier and a set of associated IP address(es) across a common LAN.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp. A VRRP Router may backup one or more virtual routers. B. active virtual forwarder active virtual router active virtual gateway designated router Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: GLBP Active Virtual Gateway Members of a GLBP group elect one gateway to be the active virtual gateway (AVG) for that group. Gateways are assigned the next MAC address in sequence. D. C. virtual router master virtual router backup virtual router active virtual router standby Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: VRRP Definitions VRRP Router A router running the Virtual Router Redundancy Protocol. Reference: http://www.html#wp1039651 QUESTION 7 Which gateway role is responsible for answering ARP requests for the virtual IP address in GLBP? A. Other members of the GLBP group learn the virtual MAC addresses from hello messages.QUESTION 5 What is the default amount by which the hot standby priority for the router is decremented or incremented when the interface goes down or comes back up? A. The AVG is responsible for assigning the virtual MAC addresses to each member of the group. When a tracked interface fails.1_19_ea1/confi guration/guide/swhsrp.cisco. 2 4 6 8 Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: GLBP Virtual MAC Address Assignment A GLBP group allows up to four virtual MAC addresses per group.

0 15. Note: GLBP members communicate between each other through hello messages sent every 3 seconds to the multicast address 224.cisco.255.0. Verify the spanning-tree topology and check if there is any layer2 loop. Reference: http://www. Reference: http://www. when up. then it indicates that this router is receiving its own hello packets sent. C.IP Address Owner The VRRP router that has the virtual router's IP address(es) as real interface address(es).com/en/US/products/hw/switches/ps708/products_configuration_example0918 6a00807d2520.shtml#dr QUESTION 12 Ferris Plastics.255. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. The "standby follow" command configures an HSRP group to become a slave of another HSRP group. D. and answering ARP requests for these IP addresses.cisco. When configuring the multicast boundary command. If the MAC address of the interface is the same as the one reported in the error message. %GLBP-4-DUPADDR: Duplicate address The error message indicates a possible layer2 loop and STP configuration issues.ietf. standby slave standby group track standby follow standby group backup Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Perform this task to configure multiple HSRP client groups. B.org/rfc/rfc3768. Which option describes the reason for this message in a GLBP configuration? A. standby 1 track 100 standby 1 track 100 decrement 1 standby 1 track 100 decrement 5 standby 1 track 100 decrement 20 Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: The default decrement value for HSRP standby tracking is 10.0.102 and User Datagram Protocol (UDP) port 3222 (source and destination). with an enterprise network (access. In order to resolve this issue. then it will always become the Master. B. QUESTION 10 Which command configures an HSRP group to become a slave of another HSRP group? A. D. There is no need to explicitly state the value if the desired value is the default value.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. will respond to packets addressed to one of these IP addresses for ICMP pings. issue the show interface command to verify the MAC address of the interface. 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. DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 . unless GigabitEthernet1/0/1 on .0. C. D. One possible selection algorithm is to always select the first address.com/en/US/docs/ios-xml/ios/ipapp_fhrp/configuration/15-mt/fhp. is a medium sized company. B. Primary IP Address An IP address selected from the set of real interface addresses. Inc. TCP connections. If the interface MAC address is different from the one reported in the error message. Reference: http://www. permit the Multicast address by permit 224. Unavailable GLBP active forwarder Incorrect GLBP IP address HSRP configured on same interface as GLBP Layer 2 loop Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: This section provides information you can use to troubleshoot your configuration.hsrp-mgo. Note that if the IP address owner is available. C. then some other device with a MAC address reports this error message. HSRP client groups follow the master HSRP with a slight.0.txt QUESTION 9 Which command correctly configures standby tracking for group 1 using the default decrement priority value? A.255. etc. This is the router that. random delay so that all client groups do not change at the same time. The distribution switches are configured to use HSRP to provide a high availability solution.html QUESTION 11 Refer to the exhibit. VRRP advertisements are always sent using the primary IP address as the source of the IP packet.

Using the running configurations and show commands. Troubleshooting has identified several issues. Currently all interfaces are up. . you have been asked to investigate and respond to the following question.backup device has also failed.

Disable preempt in the VLAN 101 HSRP group on DSW2's. B. GigabitEthernet1/0/1 on DSW1 was shut down. In the VLAN 101 HSRP group on DSW1.During routine maintenance. What needs to be done to make the group for VLAN 101 function properly? A.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. The distribution switches are configured to use HSRP to provide a high availability solution. is a medium sized company. unless GigabitEthernet1/0/1 on backup device has also failed. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. Troubleshooting has identified several issues. DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 . All other interfaces were up. . you have been asked to investigate and respond to the following question. with an enterprise network (access. after GigabitEthemet1/0/1 on DSW1 was reactivated. Using the running configurations and show commands. Inc. However. Enable preempt in the VLAN 101 HSRP group on DSW1. D. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: QUESTION 13 Ferris Plastics. 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. decrease the priority value to avaluethatis less ' than the priority value configured in the VLAN 101 HSRP group on DSW2. DSW2 became the active HSRP device for VLAN 101 as desired. DSW1 did not become the active router for VLAN 101 as desired. Currently all interfaces are up. C.

it became necessary to shut down the GigabitEthernet1/0/1 interface on DSW1. C. Priority value is 200.During routine maintenance. The decrement value on DSWTs should be greaterthan 195 and less than 205. we should decrement value in the track command from 11 to 18. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. Inc. E.primary device for VLAN 103 and VLAN 104 A failure of GigabitEthemet1/0/1 on primary device should cause the primary device to release its status as the primary device. with an enterprise network (access. The decrement value on DSW1 should be greaterthan 5 and less than 15. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Use "show run" command to show. Because 200 11 = 189 < 190 (priority of Vlan102 on DS2). The distribution switches are configured to use HSRP to provide a high availability solution. unless GigabitEthernet1/0/1 on backup device has also failed. is a medium sized company. QUESTION 14 Ferris Plastics. DSW1 remained the active device for the VLAN 102 HSRP group. What needs to be done to make the group function properly? A. All other interfaces were up. Troubleshooting has identified several issues. During this time. Currently all interfaces are up. . DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 . B. Using the running configurations and show commands. The decrement value on DSWTs should be greaterthan 190 and less than 200. The decrement value on DSW1 should be greaterthan 11 and less than 19. You have determined that there is an issue with the decrement value in the track command for the VLAN 102 HSRP group. The left Vlan102 is console1 of DS1. you have been asked to investigate and respond to the following question. D. 0 The decrement value on DSW1 should be greaterthan 9 and less than 15.

On DSW1. As related to the VLAN 103 HSRP group. what can be done to make the group function properly? A. disable preempt. DSW2 has not become the active device for the VLAN 103 HSRP group. .All interfaces are active.

so the correct answer is to increase the priority to more than 200. unless GigabitEthernet1/0/1 on backup device has also failed. . On DSW2. DSW1 will become active. we see that the active router has a priority of 200. increase the decrement value in the track command to a value greater than 10 and less than 50. On DSW2. Inc.B. with an enterprise network (access. C. We need to increase the priority of DSW2 to greater than 200. decrease the priority value to a value less than 190 and greater than 150. but it should be less than 250 so that if the gig 1/0/1 interface goes down. DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 . distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. while the local priority is 190. D. Using the running configurations and show commands. but less than 250. DSW2 is configured to decrement the priority by 50 if this interface goes down. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: From the output shown below of the HSRP status of DSW2. you have been asked to investigate and respond to the following question.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. On DSW1. QUESTION 15 Ferris Plastics. The distribution switches are configured to use HSRP to provide a high availability solution. increase the priority value to a value greater 200 and less than 250. is a medium sized company. Troubleshooting has identified several issues. Currently all interfaces are up.

DSW1 became the active router for the VLAN 104HSRP group. As related to the VLAN 104HSRP group. it became necessary to shut down the GigabitEthernet1/0/1 interface on DSW1 and DSW2. During this time. what can to be done to make the group function properly? . All other interfaces were up.During routine maintenance.

In this question. you have been asked to investigate and respond to the following question. G0/1/0 on DS1 & DS2 is shutdown. QUESTION 16 Ferris Plastics. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: We should NOT disable preempt on DS1. Troubleshooting has identified several issues. you will make Vlan104's HSRP group fail function. Example: if we are disable preempt on DS1. On DSW2 decrease the priority value to a value less than 150. Result is priority 144 < 145 (vlan104 on DS2 is active). Vlan104 (right): 200 155 = 145. Using the running configurations and show commands. DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 . Vlan104 (left): 150 6 = 144. . Inc. It can not become active device when G1/0/1 on DS2 fail. Result is priority 149 > 145 (Vlan104 on DS1 is active). disable preempt. Currently all interfaces are up. increase the decrement value in the track command to a value greater than 6. D.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. B. C. On DSW1. On DSW1. Vlan104 (left): 150 1 = 149. with an enterprise network (access. If increase the decrement in the track value to a value greater than 6 (> or = 6). is a medium sized company. decrease the decrement value in the track command to a value less than 1. The distribution switches are configured to use HSRP to provide a high availability solution. distribution and core switches) that provides LAN connectivity from user PCs to corporate servers.A. On DSW1. unless GigabitEthernet1/0/1 on backup device has also failed. By do that.

C. you have been asked to investigate and respond to the following question. with an enterprise network (access. Inc. QUESTION 17 Ferris Plastics.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.What is the priority value of the VLAN 105 HSRP group on DSW2? A. Troubleshooting has identified several issues. is a medium sized company. DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 . Currently all interfaces are up. B. unless GigabitEthernet1/0/1 on backup device has also failed. The distribution switches are configured to use HSRP to provide a high availability solution. . distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. Using the running configurations and show commands. Very easy to see priority of Vlan105 is 100. D. 50 100 150 200 Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: Use "show standby brief" command on console2.

90 .If GigabitEthemet1/0/1 on DSW2 is shutdown. what will be the resulting priority value of the VLAN 105 HSRP group on router DSW2? A.

. and the tracking feature for Gig 1/0/0 is enabled which will decrement the priority by 10 if this interface goes down for a priority value of 90. QUESTION 18 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.B. 150 D. 100 C. 200 Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation As seen below. the current priority for VLAN 105 is 100.

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16. They have questions about how these two devices will perform in the event of a device failure.What percentage of the outgoing traffic from the 172. we see that R1 is the active standby router for the Ethernet 0/0 link. R2-50% R2-100% R1-100% Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: Based on the following output. C. D. . so all outgoing traffic will be forwarded to R1. R1-0% R1-50 %.10. B. QUESTION 19 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP.0/24 subnet is being forwarded through R1? A.

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. However. when it comes back up. C. the standby 1 track decrement command will lower the priority from 130 to 90. which of the statement regarding HSRP priority is true? A. QUESTION 20 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP. it will then increment it by 40 back to 130 for HSRP group 1. B. If router R1 interface Etherne0/0 goes down and recovers. The interface will have the priority decremented by 40 for HSRP group 1. They have questions about how these two devices will perform in the event of a device failure. The interface will have the priority decremented by 60 for HSRP group 1 The interface will have its current priority incremented by 40 for HSRP group 1 The interface will have its current priority incremented by 60 for HSRP group 1 The interface will default to the a priority of 100 for HSRP group 1 Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Here is the HSRP configuration seen on R1: Here.Refer to the exhibit. when the Ethernet 0/0 interface goes down. E. D.

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E. B. D.What issue is causing Router R1 and R2 to both be displayed as the HSRP active router for group 2? A. The HSRP group number mismatch The HSRP group authentication is misconfigured The HSRP Hello packets are blocked The HSRP timers mismatch The HSRP group priorities are different Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: Based on the configuration output. we see that authentication is configured on R2. but not on R1: This can be further verified by issuing the "show standby" command on each router. . C.

They have questions about how these two devices will perform in the event of a device failure.QUESTION 21 Your customer has asked you to come in and verify the operation of routers R1 and R2 which are configured to use HSRP. .

0000. E.ac01 4000.0000.0010 Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: Issuing the "show standby" command on either router shows us that the virtual MAC used by HSRP group 1 is 4000.0c07.0000.What is the virtual mac-address of HSRP group 1? A.0010. 0000. B.ac02 4000. D.ac02 0000.ac01 4000.0010 0000.0c07. C.0c07. . F.0000.