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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.

You can monitor traffic on a single VLAN or on a series or range of ports or VLANs. VLAN filtering refers to analyzing network traffic on a selected set of VLANs on trunk source ports. interface port channel 1 is in the down/down state. and the other is using desirable. C.html#wp3 875419997 QUESTION 6 Refer to the exhibit. D. E. The channel group identifier must be different for Switch A and Switch B. Reference: http://www. The switch ports are not configured in trunking mode. B.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. If you specify a series of VLANs. You can have a total of 66 SPAN and RSPAN sessions on a switch or switch stack. Change the configuration for GigabitEthernet0/48 so that it is a member of VLAN 10. Usage Guidelines You can set a combined maximum of two local SPAN sessions and RSPAN source sessions. SPAN copies (or mirrors) traffic received or sent (or both) on source ports or source VLANs to a destination port for analysis. Why is the EtherChannel bundle not working? A. C. VLAN monitoring and VLAN filtering are mutually exclusive. | -] options. which is an LACP mode. If a VLAN is a source. If you specify a range of VLANs. 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. C. F. D. LACP priority must be configured on both switches. use the monitor session filter global configuration command. 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. D. A network engineer wants to analyze all incoming and outgoing packets for an interface that is connected to an access switch. Which three items must be configured to mirror traffic to a packet sniffer that is connected to the distribution switch? (Choose three. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Here we have a situation where one switch is using active mode. By default. Add an access list to GigabitEthernet0/48 to filter out traffic that is not in VLAN 10. You select a series or range of VLANs by using the [ . If VLAN filtering is configured. 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. all VLANs are monitored on trunk source ports. VLAN filtering cannot be enabled. or to limit (filter) SPAN source traffic to specific VLANs. a VLAN cannot become a source.html QUESTION 7 After an EtherChannel is configured between two Cisco switches. Here is a summary of the various etherchannel modes: . which is a PAGP mode.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12.cisco.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. you must enter a space before and after the comma. while Switch B is configured with channel-group 1 mode desirable. and destination ports on different switches (or different switch stacks). Change the monitor session source to VLAN 10 instead of the physical interface. You can not mix the LACP and PAGP protocols to form an etherchannel. The switches are using mismatched EtherChannel negotiation modes. you must enter a space before and after the hyphen ( -). Apply the monitor session filter globally to allow only traffic from VLAN 10.) A. RSPAN supports source ports. Each RSPAN source switch must have either ports or VLANs as RSPAN sources. source VLANs. B. enabling remote monitoring of multiple switches across your network. Switch A is configured with channel-group 1 mode active. The destination is always a physical port Reference: http://www. 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.2_55_se/configuration/guide/3750xscg/swspan. 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. B.

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

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

The trunk between Switch A and Switch B is misconfigured.com/c/en/us/support/docs/lan-switching/spanning-tree. The backup port applies only when a single switch has two links to the same segment (collision domain). but Switch C is not receiving traffic from certain VLANs.com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080094c52. The alternative port moves to the forwarding state if there is a failure on the designated port for the segment. and C are trunked together and have been properly configured for VTP. These ports are allowed to immediately enter the forwarding state rather than passively wait for the network to converge.cisco. This makes them candidates for rapid transition to the forwarding state. The new switches are using RSTP instead of legacy IEEE 802. D. C.shtml QUESTION 15 Refer to the exhibit. B. Without VTP pruning. and unknown unicast traffic across all trunk links within a VTP domain even though receiving switches might discard them. the network engineer notices that the port roles that were once "blocking" are now defined as "alternate" and "backup. Switch A.protocol/24062-146. After testing. not on trunk links. IEEE 802. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: RSTP works by adding an alternative port and a backup port compared to STP.1D STP. This automatic link type setting can be overridden by explicit configuration. Reference: http://www.1D STP and PortFast have been configured by default on all newly implemented Cisco Catalyst switches. while a half-duplex port is considered as a shared port by default. 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. STP is unable to achieve rapid transition for trunk links.Explanation/Reference: Explanation: VTP transparent switches do not participate in VTP. B. RSTP has been enabled per interface and not globally. This path is different than using the root port. In switched networks today. The link type is automatically derived from the duplex mode of a port. A VTP authentication mismatch occurred between Switch A and Switch B. Reference: http://www. A VTP transparent switch does not advertise its VLAN configuration and does not synchronize its VLAN configuration based on received advertisements. What would cause this issue? A. a network administrator can manually disable a port Reference: http://www. * Disabled port Not strictly part of STP. multicast. 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. C.protocol/24062-146.cisco.point links. * Backup port A backup/redundant path to a segment where another bridge port already connects. D. The switch does not have the processing power to ensure rapid transition for all ports. 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. The administrator has defined the switch as the root in the STP domain. Switch B has all VLANs. The STP root bridge selection is forcing key ports to remain in non-rapid transitioning mode. QUESTION 16 After the recent upgrade of the switching infrastructure. D.html QUESTION 17 An administrator recently configured all ports for rapid transition using PortFast.html QUESTION 18 Which technique automatically limits VLAN traffic to only the switches that require it? . The best explanation for why switch C is not seeing traffic from only some of the VLANs. is that VTP pruning has been configured. B. What is the reason for this? A. The VTP revision number of Switch B is higher than that of Switch A. VTP pruning is configured globally on all switches and it removed VLANs from the trunk interface that is connected to Switch C. it has been determined that several ports are not transitioning as they should. the switch must be attached to a hub. a switch floods broadcast.cisco.com/c/en/us/support/docs/lan-switching/ spanning-tree. but transparent switches do forward VTP advertisements that they receive out their trunk ports in VTP Version 2. To have two links to the same collision domain. VTP pruning blocks unneeded flooded traffic to VLANs on trunk ports that are included in the pruningeligible list. C. most links operate in full-duplex mode and are treated as point-to-point links by RSTP. VTP pruning is disabled by default. The port roles have been adjusted based on the interface bandwidth and timers of the new Cisco Catalyst switches. A port that operates in full-duplex is assumed to be point-to-point. B." What is the reason for this change? A.

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

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

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

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

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

com/en/US/tech/tk389/tk689/technologies_tech_note09186a0080890613. Allowing additional VLANs across the trunk introduced a loop in the network. how many VLANs can be used to carry user traffic? A.A.2_52_se/config uration/guide/swvtp. D. VTP pruning removed all unused VLANs.com/document/11836/how-define-vlans-allowed-trunk. and it avoids the use of the spanning tree.link QUESTION 40 When you design a switched network using VTPv2.30 is issued. 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. B. you cannot convert from VTP version 3 to version 1 or 2. QUESTION 37 After configuring new data VLANs 1020 through 1030 on the VTP server. D. The first thing that should be done is to verify that the trunk ports are connected and up. ISL was unable to encapsulate more than the already permitted VLANs across the trunk. Since the question asked for the choice that is an enhancement to the STP design. B.shtml QUESTION 39 The network manager has requested that several new VLANs (VLAN 10. 1024 . Another switch in the domain has a higher revision number than the server. 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. Reload the new switch. 1000 B. The VTP version number must be set to version 3. 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. After each update to the VTP server. The VTP server must be reloaded. B. E. You must reenter the password if you enter a takeover command in the domain. VTP versions 1 and 2 propagate only VLANs 1 to 1005. If extended VLANs are configured.cisco.20. VTP-pruned VLANs do not reduce the number of spanning tree port instances. C. Use VTP pruning on the trunk interfaces. What is the problem? A. and 30) are allowed to traverse the switch trunk interface.com/en/US/docs/switches/lan/catalyst3560/software/release/12. the secret key from the password string is saved in the VLAN database file. and overwrite any others that were previously defined. a network engineer notices that none of the VTP clients are receiving the updates. VTP pruning is the best choice. VTP pruning--Avoid this method if the goal is to reduce the number of STP instances. Reference: https://supportforums. D. Create a Layer 3 transit VLAN to segment the traffic between the sites. Configure manual trunk pruning between the two locations. Which enhancement to a spanning-tree design prevents unnecessary traffic from crossing the extended LAN segment? A. Reference: http://www. 1001 C. Instead. What is the root cause of the problem? A. Restart the VTP process on the new switch. Therefore. When you enter the secret keyword. all other existing VLANs no longer pass traffic over the trunk.cisco. C. After the command switchport trunk allowed vlan 10. the method runs the pruned VLAN on trunks. When hidden. C. the key associated with the password is saved in hexadecimal format in the running configuration. you can directly configure the password secret key. VTP. Modify the spanning-tree priorities to dictate the traffic flow. The command effectively removed all other working VLANs and replaced them with the new VLANs. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: The "switchport trunk allowed vlan" command will only allow the specified VLANs. 20. Verify connected trunk ports. You would also need to explicitly allow the other working VLANs to this configuration command. 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.html#wp1316856 QUESTION 38 A network engineer is extending a LAN segment between two geographically separated data centers. B. but it does not appear in plain text in the configuration.pruned VLANs on a trunk are still part of the spanning tree. Instead. Support for extended range VLAN (VLANs 1006 to 4094) database propagation. it takes up to 4 hours propagate. Reload the VTP server. D.cisco. Reference: http://www. C. VTP must be stopped and restarted on the server.

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

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

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

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

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

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

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

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

C. When you disable voice VLAN. Instead. Use the show vlan privileged EXEC command to see if the VLAN is present (listed in the display). Obviously. D. a port can not be both. The Port Fast feature is automatically enabled when voice VLAN is configured. Exhibit B C.html QUESTION 68 In which portion of the frame is the 802. Reference: http://www. Exhibit D Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: In this case. 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. for Ethernet frames. C. B.C. Exhibit C D.org/wiki/IEEE_802. The voice VLAN should be present and active on the switch for the IP phone to correctly communicate on the voice VLAN.1Q does not encapsulate the original frame. D. B. the Port Fast feature is not automatically disabled. A. ignoring the switchport access VLAN 10 command.1_22_ea11x/co nfiguration/guide/swvoip. the port has been configured both as a trunk and as a switchport in data vlan 10.1q header found? A. D.1Q QUESTION 69 . 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. QUESTION 67 Which feature is automatically enabled when a voice VLAN is configured. so even though Cisco IOS will accept both. the port will actually be used as a trunk.com/en/US/docs/switches/lan/catalyst2950/software/release/12.wikipedia.1Q tag in an Ethernet frame 802. Exhibit A B.cisco. but not automatically disabled when a voice VLAN is removed? A. it adds a 32-bit field between the source MAC address and the EtherType/length fields of the original frame Reference: http://en.

com/VTP-Pruning. 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. . there are occasions when VTP can create unnecessary traffic. Then. Change VTP mode to server and enable 802. B. By default. QUESTION 72 Refer to the exhibit.html#vtp_pruning QUESTION 71 Refer to the exhibit. B. C.1q. However. D.21. VTP pruning is a feature that you use in order to eliminate or prune this unnecessary traffic.orbit-computer-solutions. B.Which VLAN range is eligible to be pruned when a network engineer enables VTP pruning on a switch? A. 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.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. The network engineer found that the engineering VLAN is missing from the database. D. All unknown unicasts and broadcasts in a VLAN are flooded over the entire VLAN. Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Only VTP servers can add new VLANs to the switched network. Enable VTP pruning and disable 802. even in situations in which few users are connected in that VLAN. but VLAN 1 can't be pruned because it's an administrative VLAN.1Q trunking to pass this new VLAN along to the other switches. Reference: http://www. All switches in the network receive all broadcasts.cisco. C. Which action resolves this problem? A. D.com/c/en/us/ support/docs/lan-switching/vtp/10558. all the clients in the VTP domain will automatically enable VTP pruning. The users in an engineering department that connect to the same access switch cannot access the network. Update the VTP revision number. Disable VTP pruning and disable 802.1q. C. Both VTP versions 1 and 2 supports pruning. Reference: http://www. you will need to enable 802. so to enable vlan 10 on this switch you will first need to change the VTP mode from client to server. VLANs 2 1001 are pruning eligible.1q.

Enable the company B switch with the vtp mode server command. Reference: http://www. B. Which action resolves this problem? A. but version 2 does not. Cisco Discovery Protocol version 2 carries native VLAN information. If you have a native VLAN mismatch. Cisco Discovery Protocol version 3 carries native VLAN information.asp?p=29803&seqNum=3 QUESTION 75 Refer to the exhibit. Consider that this is a multivendor environment. Cisco Discovery Protocol version 1 carries native VLAN information.1Q is supported by multiple vendors since ISL is a Cisco proprietary protocol.com/articles/article.dat and ensure that the switch with lowest MAC address is the VTP server. D. 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. Disable DTP and document the VTP domain mismatch.ciscopress. but version 1 does not. The VTP domain names do match and they are both VTP servers so there are no issues there. you will see CDP error messages on the console output. 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.The network switches for two companies have been connected and manually configured for the required VLANs. 802. but versions 1 and 2 do not. B. Of these. Manually force trunking with switchport mode trunk on both switches. Cisco Discovery Protocol version 1 and version 2 carry native VLAN information. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Cisco Discovery Protocol (CDP) version 2 passes native VLAN information between Cisco switches. C. . QUESTION 74 Which statement about using native VLANs to carry untagged frames is true? A. D. D. but users in company A are not able to access network resources in company B when DTP is enabled. C. Which Cisco IOS switching feature can be used to achieve the task? A. There are 2 different methods for trunking. 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. Delete vlan. 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. C. only 802.1Q and ISL.

which stops the inefficient flooding of frames where they are not needed. D. Reference: http://www. VLAN spanning-tree in SW-2 is configured. Manually prune default VLAN with switchport trunk allowed vlans remove. B. The "trunk pruning vlan 1" option is not a valid command.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.1Q tunneling (Q-in-Q) feature increases the frame size by 4 bytes when the extra tag is added. If spanning tree detects a native VLAN mismatch. 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. however.A multilayer switch has been configured to send and receive encapsulated and tagged frames. Enable VTP pruning on the VTP server. If you use 802. B. both with native VLAN mismatch. C. Reference: http://www. QUESTION 78 What is required for a LAN switch to support 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.1q Q-in-Q encapsulation? A. C. D. Use trunk pruning vlan 1.com/c/en/us/support/docs/switches/catalyst-6500-series. the trunk still remains up for other VLANs.switches/24330-185. D. C.informit. VLAN 1 is not VTP pruning eligible so it cannot be done via VTP pruning. spanning tree blocks local native VLAN traffic and the remote switch native VLAN traffic on the trunk. B.1q trunks are on both sides. Correct Answer: C Section: [none] Explanation Explanation/Reference: Here we see that the native VLAN has been configured as 2013 on one switch. D. 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.cisco. B. Explanation: http://www.com/library/content. you must ensure that you choose a common native VLAN for each port in the trunk. 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. The "vtp pruning" command prunes VLANs automatically.html QUESTION 77 Which action allows a network engineer to limit a default VLAN from being propagated across all trunks? A. Which option is the cause of the spanning-tree error? A. C. 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. not via DTP messages. VLAN 2013 on the multilayer switch is configured as the native VLAN.1Q trunks.html QUESTION 79 Refer to the exhibit. spanning-tree bpdu-filter is enabled. . but 1 (the default native VLAN) on the other switch. Upgrade to VTP version 3 for advanced feature set support.com/en/US/docs/switches/lan/catalyst3550/software/release/12. Because the 802.1_13_ea1/confi guration/guide/swtunnel.cisco. Native VLAN mismatches are detected via spanning tree and Cisco Discovery Protocol (CDP). 802. VLAN ID 1 should not be used for management traffic because its unsafe. Which Cisco IOS feature can be used to achieve this task? A.

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

we see that fa 0/13. Only the combinations auto-desirable. The peer (in active state) initiates negotiation (when it sends out an LACP packet) which we receive and answer. This is similar to the desir.tiated. 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. 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. Users of PC-1 experience slow connection when a webpage is requested from the server. and on-on will allow a channel to be formed. which is only a PAgP mode.In other words. desirable: PAgP is running actively. however. We do not send or understand the LACP packet. and fa0/15 are all in Port Channel 12. B. the switch neither sends the LACP packet nor processes any inbound LACP packet. which is operating in desirable mode. . eventually to form the aggregation channel with the peer. fa0/14. 1.able mode of PAgP.Which EtherChannel negotiation protocol is configured on the interface f0/13 f0/15? A. The channel is forced to come up.desirable. 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 . it is not initiated. The formation of a channel is desired. This is similar to the off state for PAgP. This is similar to the on state for PAgP. auto. Off: The link aggregation is not formed. Which action can the engineer take to resolve this issue? . C. The channel is forced to remain down. and on. This is similar to the auto mode in PAgP. traffic is still slow. the network engineer configured an EtherChannel on interfaces Fa1/0 and Fa0/1 of the server farm switch. The formation of a channel is desired and ini. on: PAgP will not run. Passive: The switch does not initiate the channel but does understand inbound LACP packets. desirable. auto: PAgP is running passively. D. 2. To increase bandwidth. 4. off: PAgP will not run. QUESTION 83 Refer to the exhibit. desirable. The link aggregate is formed if the other end runs in LACP active or passive mode. In this example. 3. Active: We can form an aggregate link and initiate the negotiation.

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

1d BPDU? A. If the switch receives an 802. but when a RSTP switch receives a 802. if the RSTP switch is using 802. it assumes that it is connected to an 802.1d understands RSTP BPDUs because they are the same version. B. it does not respond with a 802. Reference: http://www. what is the total number of spanning-tree instances running on the switch? A. but when a RSTP switch receives an 802.1D BPDU after the port migration-delay timer has expired.1d BPDU.1d does not understand RSTP BPDUs because they are different versions.1d BPDU and eventually the two switches run 802. and Fa0/15 successfully formed a Layer 2 port-channel interface using an open standard protocol. However. MST establishes and maintains IST. it responds with an 802. 802. 802.1d BPDU.cisco.1d BPDU. CIST.1D switch and starts using only 802. Fa0/14. 1 2 3 4 Correct Answer: C Section: [none] Explanation Explanation/Reference: Explanation: Unlike other spanning tree protocols. and CST spanning trees: An IST is the spanning tree that runs in an MST region. B. the migrate-delay timer is started (specifies the minimum time during which RSTP BPDUs are sent). Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: These three ports show that they are in Port Channel 1. D.1D BPDUs.1d BPDU and eventually the two switches run 802.1d to communicate. MST maintains multiple spanning tree instances.Which statement about switch S1 is true? A. and Fa0/15 successfully formed a Layer 3 port-channel interface using a Cisco proprietary protocol.1D configuration BPDUs and TCN BPDUs on a per-port basis.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. Instance 0 is a special instance for a region. in which all the spanning tree instances are independent.1D switches.1d to communicate. QUESTION 87 What happens on a Cisco switch that runs Cisco IOS when an RSTP-configured switch receives 802. but when a RSTP switch receives a 802. C. it restarts the timer and starts using RSTP BPDUs on that port. Within each MST region. C. and Fa0/15 successfully formed a Layer 3 physical port-channel interface using an open standard protocol.1d BPDU and eventually the two switches run 802. D.1d understands RSTP BPDUs because they are the same version. 802. .2SX/configuration/guide/book/spantree. When a port is initialized. as opposed to PAgP. it does not respond with a 802.1d BPDU. 802. and Fa0/15 successfully formed a Layer 2 physical port-channel interface using a Cisco proprietary protocol. which is Cisco proprietary. The protocol used for this port channel shows as LACP. Logical port Fa0/13. Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: For backward compatibility with 802. Fa0/14.html QUESTION 88 When two MST instances (MST 1 and MST 2) are created on a switch. there will be the 2 defined MST instances. While this timer is active. and the special 0 instance. All other MST instances are numbered from 1 to 4094. Physical port Fa0/13.1d does not understand RSTP BPDUs because they are different versions.1D BPDUs on a port and receives an RSTP BPDU after the timer has expired. the switch processes all BPDUs received on that port and ignores the protocol type. which is a standards based protocol.1d BPDU. and the (SU) means they are in use and operating at layer 2. for a total of 3 instances. B. Fa0/14. Fa0/14. RSTP selectively sends 802. but when a RSTP switch receives a 802. it responds with a 802. D. known as the IST. and RSTP BPDUs are sent. In the case for this question. Logical port Fa0/13.1d to communicate. C. Physical port Fa0/13.

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

it has the lowest priority value for VLAN 1. The bridge priority is 1 and all ports are forwarding.Why would the switch be considered as a root bridge? A. from the direction of Root Bridge) Connected Bridge ID . The switch priority for VLAN 1 and the macro specifies "This Bridge is the root". C. C. The bridge priority is 128.html#wp1020666 QUESTION 91 Refer to the exhibit. The lower the number. which represents the best path to the Root Bridge.lowest prevails o In this case. D. Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: For priority.lowest prevails (local Root Port cost added o upon receipt of Configuration BPDUs on that port. the range is 0 to 61440 in increments of 4096. B. fa0/21 has the lowest cost. The switch priority value is zero. the default is 32768. which option will be the new root port for VLAN 10? A.1_9_ea1/config uration/guide/swstp. D. Total Path Cost to root .com/en/US/docs/switches/lan/catalyst2950/software/release/12.19 and all ports are forwarding.cisco.lowest prevails o Local Port ID . the more likely the switch will be chosen as the root switch. Reference: http://www. Reference: . B. 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. All ports are members of VLAN 10. so it will be the root port.lowest prevails o Connected Port ID (Port Priority + Port#) . Considering the default cost of upstream bridges to the root bridge is equal.

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

Reference: http://www. 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.cisco.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74 b. The VSS transitions to the dual active recovery mode. Reference: http://www.html QUESTION 99 You have been asked to install and configure a new switch in a customer network. The dual active state is detected rapidly (subsecond) by any of the following three methods: Enhancement to PAgP used in MEC with connecting Cisco switches L3 Bidirectional Forwarding Detection (BFD) configuration on a directly connected link (besides VSL) between virtual switch members or through an L2 link through an access layer switch L2 Fast-Hello Dual-Active Detection configuration on a directly connected link (besides VSL) between virtual switch members (supported with 12. The VSS detects which system was last in active state and shuts down the other switch. The new active virtual switch continues to forward traffic on all links. What happens if all VSL connections between the virtual switch members are lost? A.cisco.html QUESTION 97 Which statement describes what happens if all VSL connections between the virtual switch members are lost? A. Both virtual switch members cease to forward traffic. but the new active virtual switch forwards traffic on all links.cisco. If for some rare reason all VSL connections are lost between the virtual switch members leaving both the virtual switch members up. Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: In the dual active recovery mode. and only the new active virtual switch continues to forward traffic.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74 b. All interfaces are shut down in the formerly active virtual switch member. and both virtual switch members continue to forward traffic independently. . 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. all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member. The VSS transitions to the dual active recovery mode.2(33)SXI) In the dual active recovery mode.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. B.com/en/US/prod/collateral/switches/ps5718/ps9336/prod_qas0900aecd806ed74 b.2SX/configuration/guide/mla cp_server_support. The switch continues to forward traffic out all links and enables spanning tree on VSL link and all other links to prevent loops. C. Correct Answer: D Section: [none] Explanation Explanation/Reference: Explanation: Q.html QUESTION 98 Which statement describes what happens when a switch enters dual active recovery mode? A. B. all interfaces except the VSL interfaces are in an operationally shut down state in the formerly active virtual switch member. C. The virtual switch members reload.The DHD system priority must be lower (higher numerically) than the PoA system priority.com/en/US/docs/switches/lan/catalyst6500/ios/12. The new active virtual switch continues to forward traffic on all links.cisco. D. D. C. Use the console access to the existing and new switches to configure and verify correct device configuration. Reference: http://www. the VSS will transition to the dual active recovery mode. Reference: http://www. The switch shuts down and waits for the VSL link to be restored before sending traffic. B. D.

.

.

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.

For which configured VLAN are untagged frames sent over trunk between SW1 and SW2? A. C. D. E. By issuing the "show interface trunk" command on SW1 and SW2 we see the native VLAN is 99. F. . B. G. 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.

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

.

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

.

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

• SwitchB VTP mode needs to be the same as SwitchA. • 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. All other vlans should be left are their default values. 21. 22 and 23 should tagged when traversing the trunk link. 21.21-23 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 . 12. This mode should be done with a non-proprietary protocol. • SwitchA needs to be the root switch for vlans 11.1. 22 and 23.Configuration Requirements for SwitchA The VTP and STP configuration modes on SwitchA should not be modified. • 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. • Propagation of unnecessary broadcasts should be limited using manual pruning on this trunk link. 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 1.11/24 Inter-switch Connectivity Configuration Requirements • For operational and security reasons trunking should be unconditional and Vlans 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.21-23 channel-protocol lacp channel-group 1 mode passive switchport mode trunk ! interface FastEthernet0/4 switchport trunk allowed vlan 1. with SwitchA controlling activation. 13.168.

168.21-23 channel-protocol lacp channel-group 1 mode active switchport mode trunk ! interface FastEthernet0/4 switchport trunk allowed vlan 1.21-23 ! interface Vlan1 ip address 192.255.11 255.1. All routes must be learned via EIGRP 65010 routing protocol. Also SwitchC needs to be able to ping server S1. You do not have access to RouteC.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. Due to administrative restrictions and requirements you should not add/delete vlans or create trunk links. Company policies forbid the use of static or default routing.168.1.0 ! 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. You need to configure SwitchC so that Hosts H1 and H2 can successfully ping the server S1.255. The following subnets are available to implement this solution: – 10. RouterC is correctly configured.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 192.0/24 .10. which has a partial configuration and has been attached to RouterC as shown in the topology diagram. Routed interfaces should use the lowest host on a subnet when possible.1 ! ! End QUESTION 104 You have been tasked with configuring multilayer SwitchC.10. No trunking has been configured on RouterC.

Note: Due to administrative restrictions and requirements you should not add or delete VLANs.250. . All routes must be learned via the EIGRP routing protocol.32/27 – 190. Company policies forbid the use of static or default routing.200. Routing must only be enabled for the specific subnets shown in the diagram. changes VLAN port assignments or create trunks.64/27 Hosts H1 and H2 are configured with the correct IP address and default gateway.250.– 190.200. SwitchC uses Cisco as the enable password.

+ Only use SwitchC for interVLAN routing without using RouterC.200.250. even without “no auto-summary” command the network still works correctly. you should expect the ping to SERVER to succeed from the MLS.0. .2 255.33 Host2: + Default gateway: 190.32 0.31″ we can use one simple command “network 190.200. Also some reports said the “no auto-summary” command can’t be used in the simulator.10. no neighbor relationship is formed between RouterC and SwitchC.0. in fact it is not necessary because the network 190.200. just for sure.0.250.10.0 0.200. Also make sure you use the correct EIGRP AS number (in the configuration above it is 650 but it will change when you take the exam) but we are not allowed to access RouterC so the only way to find out the EIGRP AS is to look at the exhibit above.10. SwitchC# configure terminal SwitchC(config)# int gi0/1 SwitchC(config-if)#no switchport -> without using this command. But after finishing the configuration.255. the simulator does not let you assign IP address on Gi0/1 interface.255 SwitchC(config-router)# network 190.0 is shown.33 255. If you use wrong AS number.64 0.200.224 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. In order to complete the lab.250.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. also don’t modify/delete any port just do the above configuration. 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.250.0. Trunking must be established between RouterC and SwitchC. SwitchC should be configured as a Layer 3 switch (which supports ip routing function as a router).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 gi0/10.32 0.250. 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.255.224 SwitchC(config-if)# no shutdown SwitchC(config-if)# int vlan 3 SwitchC(config-if)# ip address 190.31 SwitchC(config-router)# network 190.250.10.255.10.250.200.0. and from the PCs as well.31″ and “network 190.200. SwitchC(config-if)# ip address 10.250.31 NOTE: THE ROUTER IS CORRECTLY CONFIGURED.0 ->RouterC has used IP 10.1 so this is the lowest usable IP address.200. we can use “show run” command to verify.65 255.0.255.200. gi0/11 interfaces were configured as access ports so we don’t need to configure them in this sim.200.255. so you will not miss within it in the exam.0.200. But in the exam the sim is just a flash based simulator so we should use two above commands.255. SwitchC(config-if)# no shutdown SwitchC(config-if)# exit SwitchC(config)# int vlan 2 SwitchC(config-if)# ip address 190. Click on H1 and H2 and type the “ipconfig” command to get their default gateways.0.0/16 is not used anywhere else in this topology.0. We should check the default gateways on H1 & H2.0.0. No trunking requires.0. In fact.64 0.0. C:\>ipconfig We will get the default gateways as follows: Host1: + Default gateway: 190. we are pretty sure instead of using two commands “network 190.10.

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

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

its associated MAC address. An entry in this table has an IP address. and its associated VLAN number. The switch drops broadcasts when they reach 75% of bandwidth. it is set to the rising suppression level.html#wp1069615 QUESTION 9 The command storm-control broadcast level 75 65 is configured under the switch port connected to the corporate mail server. Layer 2 interfaces by filtering traffic based on the DHCP snooping binding database and on manually configured IP source bindings. Reference: http://www. or unicast storm control. By de. Reference: http://www.cisco. B. Here is an example output: Switch> show mac-address-table Dynamic Addresses Count: 9 Secure Addresses (User-defined) Count: 0 Static Addresses (User-defined) Count: 0 . If a port is in per-VLAN errdisable mode.Explanation/Reference: Explanation: IP source guard is a security feature that restricts IP traffic on nonrouted. In which three ways does this command impact the traffic? (Choose three. the switch blocks all IP traffic received on the interface. This is the default mode.cisco.2/53SG/configuration/config/port_sec. After IP source guard is enabled on an interface. E. D. 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. The switchport is disabled when unicast traffic reaches 75% of the total interface bandwidth. storm control is disabled.com/c/en/us/td/docs/switches/lan/catalyst3550/ software/release/12. In this case. The range is 0.00. The switch resumes forwarding broadcasts when they are below 65% of bandwidth. The range is 0.cast | multicast | uni. C. You can configure IP source guard with source IP address filtering or with source IP and MAC address filtering. IP source guard is supported only on Layer 2 ports.00 to 100. you can also use clear errdisable interface name vlan range command to re-enable the VLAN on the port. B. E. Which command accomplishes this task? A. cast} level {level [levThe keywords have these meanings: el-low] | pps pps [ppslow]} For level. F. Reference: http://www. This value must be less than or equal to the rising suppression value. 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.00. except for DHCP packets allowed by DHCP snooping. The port forwards traffic when traffic drops below this level. multicast. or unicast traffic as a percentage (up to two decimal places) of the bandwidth. (Optional) For level-low. You can enable IP source guard when DHCP snooping is enabled on an untrusted interface. A port access control list (ACL) is applied to the interface.cisco. D. The port blocks traffic when the rising threshold is reached.Configure broadcast.pdf QUESTION 11 The network monitoring application alerts a network engineer of a client PC that is acting as a rogue DHCP server.) A. Correct Answer: CDF Section: [none] Explanation Explanation/Reference: Explanation: storm-control {broad. The port ACL allows only IP traffic with a source IP address in the IP source binding table and denies all other traffic. Multicast traffic is dropped at 65% and broadcast traffic is dropped at 75% of the total interface bandwidth.00 to 100.2_25_see/configuration/guide/3550SCG/ swdhcp82. specify the rising threshold level for broadcast. 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. specify the falling threshold level as a percentage (up to two decimal places) of the bandwidth. B. C. Which two commands help trace this PC when the MAC address is known? (Choose two.com/c/en/us/td/docs/switches/lan/catalyst4500/12. including the switch port that the particular host is using. The IP source binding table has bindings that are learned by DHCP snooping or are manually configured (static IP source bindings).fault. multicast.) A.html QUESTION 10 After port security is deployed throughout an enterprise campus. the network team has been overwhelmed with port reset requests. SNMP traps are sent by default when broadcast traffic reaches 65% of the lower-level threshold. C. 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. the broadcast keyword was used so only broadcast traffic is limited. E.com/c/en/us/td/docs/switches/lan/catalyst3550/software/release/12. D. including access and trunk ports.2_25_see/configuration/guide/3550SCG/swtrafc. If you do not configure a falling suppression level. Only broadcast traffic is limited by this particular storm control configuration. They decide to configure the network to automate the process of re-enabling user ports. The switch uses the IP source binding table only when IP source guard is enabled.

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

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

including the community and isolated host ports.html QUESTION 21 Which private VLAN access port belongs to the primary VLAN and can communicate with all interfaces.com/c/en/us/support/docs/switches/catalyst-3750-series. · Builds and maintains the DHCP snooping binding database. Each port is completely isolated from all other ports in the isolated VLAN. On untrusted interfaces. You can have more than one isolated port in a specified isolated VLAN.cisco. 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. the DHCP snooping binding database.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12. This database is built by DHCP snooping if DHCP snooping is enabled on the VLANs and on the switch. C.cisco. B. which contains information about untrusted hosts with leased IP addresses. 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. that belong to those secondary VLANs associated to the promiscuous port and associated with the primary VLAN. This port has complete isolation from other ports within the same private VLAN domain.2SX/configuration/guide/book/snoodhcp. and enable DHCP globally on the switch. the switch forwards the packet only if it is valid. D. Each promiscuous port can have several secondary VLANs. or no secondary VLANs. Reference: http://www. Utilizes the DHCP snooping binding database to validate subsequent requests from untrusted hosts. You may want to do this for load-balancing or redundancy purposes.pdf QUESTION 19 Which switch feature determines validity based on IP-to-MAC address bindings that are stored in a trusted database? A. You can also have secondary VLANs that are not associated to any promiscuous port. Traffic received from an isolated port is forwarded only to promiscuous ports. associated to that port. configure the port as trusted by entering the "ip dhcp snooping trust" interface configuration command. as long as the promiscuous port and secondary VLANs are within the same primary VLAN. Reference: http://www. You can have several promiscuous ports in a primary VLAN. Reference: http://www.html QUESTION 20 Which command is needed to enable DHCP snooping if a switchport is connected to a DHCP server? A. Isolated--An isolated port is a host port that belongs to an isolated secondary VLAN. follow these guidelines: DHCP snooping is not active until you enable the feature on at least one VLAN. The promiscuous port can communicate with all interfaces. D.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. Community ports communicate with other ports in the same community VLAN and with associated promiscuous ports. make sure that the devices acting as the DHCP server and the DHCP relay agent are configured and enabled. except that it can communicate with associated promiscuous ports. B. If a Layer 2 LAN port is connected to a DHCP client. These interfaces are isolated from all other interfaces in other communities and from all isolated ports within the private VLAN domain. Private VLANs block all traffic to isolated ports except traffic from promiscuous ports.cisco. including the community and isolated host ports? A. Before globally enabling DHCP snooping on the switch.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/ CLIConfigurationGuide/PrivateVLANs. If the ARP packet is received on a trusted interface. configure the port as untrusted by entering the no ip dhcp snooping trust interface configuration command. C. C. B. Reference: http:// www.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.2SX/configuration/guide/book/snoodhcp. D. You can associate a secondary VLAN to more than one promiscuous port. Rate-limits DHCP traffic from trusted and untrusted sources. the switch forwards the packet without any checks. 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. If a Layer 2 LAN port is connected to a DHCP server. isolated VLAN .cisco.switches/72846-layer2-secftrs-catl3fixed. The DHCP snooping feature performs the following activities: Validates DHCP messages received from untrusted sources and filters out invalid messages. Community--A community port is a host port that belongs to a community secondary VLAN.

which creates excessive traffic and degrades network performance.cisco. Isolated VLAN --An isolated VLAN is a secondary VLAN that carries unidirectional traffic upstream from the hosts toward the promiscuous ports. If you enter the ip source binding mac-address vlan vlan-id ip-address interface interface-id global configuration command on a routed interface. D. Reference: http://www. community VLAN D. Verifies that a packet has a valid IP-to-MAC address binding before updating the ARP cache or forwarding the packet.html QUESTION 24 When IP Source Guard with source IP filtering is enabled on an interface. Drops invalid ARP packets.com/c/en/us/td/docs/routers/7600/ios/122SR/configuration/guide/swcg/do s. which feature must be enabled on the access VLAN for that interface? A. When IP source guard with source IP filtering is enabled on an interface. this error message appears: Static IP source binding can only be configured on switch port.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guide/cli/ CLIConfigurationGuide/PrivateVLANs.The primary VLAN carries traffic from the promiscuous ports to the host ports. but these ports cannot communicate with ports in any other community or isolated VLAN in the private VLAN. You can configure multiple community VLANs in a private VLAN domain.com/c/en/us/td/docs/switches/lan/catalyst2960x/ software/15. the source IP address filter is applied on all the VLANs. This database is built by DHCP snooping when it is enabled on the VLANs and on the device. primary VLAN C.B. Isolated. 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. 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. and the traffic from each isolated port also remains completely separate.cisco. D.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. B. B. 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. DHCP snooping must be enabled on the access VLAN for that interface. or unicast traffic storm on physical interfaces from either mistakes in network configurations or from users issuing a DoS attack. Reference: http://www. You can enable this feature when 802.1x port-based authentication is enabled.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. DAI can determine the validity of an ARP packet based on valid IP-to-MAC address bindings stored in a DHCP snooping binding database. C. both isolated and community.x_cg_chapter_01110. multicast. and to other promiscuous ports. C. 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. You can configure multiple isolated VLANs in a private VLAN domain.pdf QUESTION 26 Which command would a network engineer apply to error-disable a switchport when a packet. If you are enabling IP source guard on a trunk interface with multiple VLANs and DHCP snooping is enabled on all the VLANs. C. It may also contain static entries that you have created.html QUESTION 25 Which switch feature prevents traffic on a LAN from being overwhelmed by continuous multicast or broadcast traffic? A. Reference:http://3c3cc. The traffic storm control feature prevents LAN ports from being disrupted by a broadcast. D.storm is detected? . all the traffic remains isolated within each one. and Community Private VLANs Primary VLANs and the two types of secondary VLANs (isolated and community) have these characteristics: Primary VLAN-. Reference: http://www.cisco.0_2_EX/security/configuration_guide/b_sec_152ex_2960-x_cg/b_sec_152ex_2960. promiscuous VLAN Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation: Understanding Primary. Each isolated VLAN can have several isolated ports. The ports within one community can communicate.

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

In other words. In other words. B.120. You have been tasked with implementing the above access control as a pre-condition to installing the servers. C. Host Ports: o Isolated Port (I-Port): Connects to the regular host that resides on isolated VLAN.html QUESTION 30 When you configure private VLANs on a switch. This port communicates only with P-Ports.cisco.wikipedia.40. o Community Port (C-Port): Connects to the regular host that resides on community VLAN. Authentication is to be done via a Radius server: · Radius server host: 172. it is a type of a port that is allowed to send and receive frames from any other port on the VLAN.40. Host port further divides in two types Isolated port (I-Port) and Community port (C-port). D. . Host Ports: o Isolated Port (I-Port): Connects to the regular host that resides on isolated VLAN. D.org/wiki/Private_VLAN QUESTION 32 SIMULATION SWITCH. C.120. 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.46 · Radius key: rad123 · Authentication should be implemented as close to the host as possible. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server. The Radius server and application servers will be installed at a future date. it is a type of a port that is allowed to send and receive frames from any other port on the VLAN. B. · Packets from devices in any other address range should be dropped on VLAN 20. The topology diagram indicates their layer 2 mapping. · Filtering should be implemented as close to the serverfarm as possible. For security reasons. 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. Host port further divides in two types Isolated port (I-Port) and Community port (C-port).os/security/configuration/guide/sec_nx-os-cfg/sec_portsec.120.org/wiki/Private_VLAN QUESTION 31 When you configure a private VLAN. which port type connects the switch to the gateway router? A. This port communicates only with P-Ports. DSW1 and ASW1. Promiscuous port (P-Port): The switch port connects to a router. Reference: http://en. This port communicates with P-Ports and ports on the same community VLAN. You must use the available IOS switch features. Reference: http://en. Promiscuous port (P-Port): The switch port connects to a router.wikipedia.Ethernet Port Channels--Port security is not supported on Ethernet port channels. o Community Port (C-Port): Connects to the regular host that resides on community VLAN. firewall or other common gateway device. 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. Reference: http://www. firewall or other common gateway device.com/c/en/us/td/docs/switches/datacenter/sw/4_1/ nx. · Packets from devices in the subnet of 172.0/24.0/24 should be allowed on VLAN 20. Corporate polices do not allow layer 3 functionality to be enabled on the switches. 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.40. This port can communicate with anything else connected to the primary or any secondary VLAN. 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. · Devices on VLAN 20 are restricted to the subnet of 172.

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

DSW1 and ASW1.120. • Filtering should be implemented as close to the serverfarm as possible. Authentication is to be done via a Radius server: • Radius server host: 172. 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. VLAN 20 is a new VLAN that will be used to provide the shipping personnel access to the server.120. The Radius server and application servers will be installed at a future date.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. .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.0 0.0/24.46 • Radius key: rad123 • Authentication should be implemented as close to the host as possible. You have been tasked with implementing the above access control as a pre-condition to installing the servers. For security reasons.40.120.39. • Packets from devices in any other address range should be dropped on VLAN 20. • Devices on VLAN 20 are restricted to the subnet of 172.0.46 key rad123 ASW1(config)#aaa authentication dot1x default group radius ASW1(config)#dot1x system-auth-control ASW1(config)#inter fastEthernet 0/1 ASW1(config-if)#switchport mode access ASW1(config-if)#dot1x port-control auto ASW1(config-if)#exit ASW1#copy run start Step2: Console to DSW1 from PC console 2 DSW1(config)#ip access-list standard 10 DSW1(config-ext-nacl)#permit 172. The topology diagram indicates their layer 2 mapping. Corporate polices do not allow layer 3 functionality to be enabled on the switches.40.0/24 should be allowed on VLAN 20.40. • Packets from devices in the subnet of 172.0.com is an IT company that has an existing enterprise network comprised of two layer 2 only switches.120.120.

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 172.46 key rad123 ASW1(config)#aaa authentication dot1x default group radius ASW1(config)#dot1x system-auth-control .39.

40.120.0 0.0.255 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 .0.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.

For each interface configured for hot standby.com/en/US/docs/switches/lan/catalyst3550/software/release/12. The range is 0 to 36000 (1 hour). D. 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.1_19_ea1/confi guration/guide/swhsrp.com/en/US/docs/switches/lan/catalyst3550/software/release/12.html#wp1044327 QUESTION 3 Which option is a benefit of using VSS? A.html QUESTION 2 What is the default HSRP priority? A.cisco. The ber] priority priority range is 1 to 255. (Optional) delay--Set to cause the local router to post.Question Set 1 QUESTION 1 Which configuration command ties the router hot standby priority to the availability of its interfaces? A. If an interface is not tracked. VSS eliminates the need for FHRP at the aggregation layer of the data center. When a tracked interface fails.lay before taking over). 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 . you can configure a separate list of interfaces to be tracked. the default is 0 (no de. FHRPs allow two (or more) distinct routers to share a common IP address providing a redundant Layer-3 default gateway for end nodes. D. its state changes do not affect the hot standby priority of the configured device. the hot standby priority on the device on which tracking has been configured decreases by 10. B. This VSS routing instance fulfills this first-hop role without the need for a dedicated protocol. C. 50 100 120 1024 Correct Answer: B Section: [none] Explanation Explanation/Reference: Explanation: standby [group-num. the default priority is 100.cisco. Reference: http://www.com/en/US/docs/solutions/Enterprise/Data_Center/vssdc_integrate. C. C. Reference: http://www. 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.cisco. B. The VSS IP route is highly available due to MEC and the resiliency of the VSS system.onds.Set a priority value used in choosing the active router. The VSS system creates a single logical router at Layer 3.1_19_ea1/confi guration/guide/swhsrp. D. it assumes control as the active router.pone taking over the active role for the shown number of sec. B. Reference: http://www.html QUESTION 4 Which First Hop Redundancy Protocol is an IEEE Standard? A. B. (Optional) group-number--The group number to which the command applies. D. Use the no form of the command to restore the default values. The highest [preempt [delay delay]] number represents the highest priority. C. (Optional) preempt--Select so that when the local router has a higher priority than the active router.

Can use real router .comparison-2/ . 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. int. the .Use virtual ip ad.2 udp 1985 224.Protocol (Gateway Load (Hot Standby Router (Virtual Redundancy Features Balancing Proprotocol) Router Protocol) tocol) . int.0.1 standby router. .0. ority become master.102 udp (version1) 3222 224..(generally through ing.1 or Virtual Foror more backup more listening warder) passing routers.1 group (Active .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. if not..group per inpendent algoterface/SVI/routed terface/SVI/routed rithm.Round-Robin algorithm (default).wordpress.18 IP 112 224.Multiple HSRP .1 active router.1 AVG (Active Virtual Gateway)..0.Use virtual ip dress. traffic.(generally through through ARP DHCP) DHCP) requesting a unique virtual gateway.optimal load-balancalgorithm ing. one with highest pri. . 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.com/2008/08/23/router-high-availability-protocol.Host-degroup per in. routers.up to 4 AVF routers on the .ip address.0.0.0.. Reference: http://cciethebeginning.1 master router.0.address..0.up to Router role 1024 virtual routers (GLBP groups) per physical interface..Multiple VRRP rithm.

The AVG is responsible for answering Address Resolution Protocol (ARP) requests for the virtual IP address. 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. C. C.1_19_ea1/confi guration/guide/swhsrp. Other group members provide backup for the AVG in the event that the AVG becomes unavailable. D. The AVG assigns a virtual MAC address to each member of the GLBP group.html#wp1039651 QUESTION 7 Which gateway role is responsible for answering ARP requests for the virtual IP address in GLBP? A. 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. B. It consists of a Virtual Router Identifier and a set of associated IP address(es) across a common LAN. 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. A virtual forwarder that has learned the virtual MAC address is referred to as a secondary virtual forwarder. The AVG is responsible for assigning the virtual MAC addresses to each member of the group.com/en/US/docs/switches/lan/catalyst3550/software/release/12.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. C.html QUESTION 8 Which VRRP router is responsible for forwarding packets that are sent to the IP addresses of the virtual router? A.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp. 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. Gateways are assigned the next MAC address in sequence. Reference: http://www. B.cisco. Other group members request a virtual MAC address after they discover the AVG through hello messages. These gateways are known as active virtual forwarders (AVFs) for their virtual MAC address. D. 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. its state changes do not affect the hot standby priority of the configured device. D. When a tracked interface fails. Virtual Router An abstract object managed by VRRP that acts as a default router for hosts on a shared LAN. If an interface is not tracked. you can configure a separate list of interfaces to be tracked. It may participate in one or more virtual routers. C. Load sharing is achieved by the AVG replying to the ARP requests with different virtual MAC addresses. For each interface configured for hot standby.cisco.cisco.html QUESTION 6 What is the maximum number of virtual MAC addresses that GLBP allows per group? A. B. B. A VRRP Router may backup one or more virtual routers. Each gateway assumes responsibility for forwarding packets sent to the virtual MAC address assigned to it by the AVG. D. Other members of the GLBP group learn the virtual MAC addresses from hello messages. Reference: http://www. the hot standby priority on the device on which tracking has been configured decreases by 10. . Reference: http://www.

When configuring the multicast boundary command.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. Note that if the IP address owner is available.0.cisco. B. TCP connections. HSRP client groups follow the master HSRP with a slight. DSW1 -primary device for VLAN 101 VLAN 102 and VLAN 105 DSW2 . There is no need to explicitly state the value if the desired value is the default value. permit the Multicast address by permit 224. with an enterprise network (access.0 15. Reference: http://www. when up. If the MAC address of the interface is the same as the one reported in the error message. 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. If the interface MAC address is different from the one reported in the error message. unless GigabitEthernet1/0/1 on .ietf. This is the router that. C. D. will respond to packets addressed to one of these IP addresses for ICMP pings. Verify the spanning-tree topology and check if there is any layer2 loop.0.cisco. then it indicates that this router is receiving its own hello packets sent. Note: GLBP members communicate between each other through hello messages sent every 3 seconds to the multicast address 224. One possible selection algorithm is to always select the first address.102 and User Datagram Protocol (UDP) port 3222 (source and destination). D.0.255. then some other device with a MAC address reports this error message. QUESTION 10 Which command configures an HSRP group to become a slave of another HSRP group? A.shtml#dr QUESTION 12 Ferris Plastics. is a medium sized company. Reference: http://www. etc. 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. B. The "standby follow" command configures an HSRP group to become a slave of another HSRP group.hsrp-mgo. Which option describes the reason for this message in a GLBP configuration? A. then it will always become the Master. VRRP advertisements are always sent using the primary IP address as the source of the IP packet.com/en/US/docs/ios-xml/ios/ipapp_fhrp/configuration/15-mt/fhp.255. The distribution switches are configured to use HSRP to provide a high availability solution. and answering ARP requests for these IP addresses.IP Address Owner The VRRP router that has the virtual router's IP address(es) as real interface address(es). distribution and core switches) that provides LAN connectivity from user PCs to corporate servers. D. B. Primary IP Address An IP address selected from the set of real interface addresses. 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.html QUESTION 11 Refer to the exhibit. C.com/en/US/products/hw/switches/ps708/products_configuration_example0918 6a00807d2520. Reference: http://www. Inc.txt QUESTION 9 Which command correctly configures standby tracking for group 1 using the default decrement priority value? A. issue the show interface command to verify the MAC address of the interface. C.0. 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.255. In order to resolve this issue.org/rfc/rfc3768. random delay so that all client groups do not change at the same time. %GLBP-4-DUPADDR: Duplicate address The error message indicates a possible layer2 loop and STP configuration issues.

backup device has also failed. 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.

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

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

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

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

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

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

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

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

. 150 D. They have questions about how these two devices will perform in the event of a device failure.B. 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. 200 Correct Answer: A Section: [none] Explanation Explanation/Reference: Explanation As seen below. the current priority for VLAN 105 is 100. 100 C.

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

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when the Ethernet 0/0 interface goes down. which of the statement regarding HSRP priority is true? A. If router R1 interface Etherne0/0 goes down and recovers. 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. D. C. . the standby 1 track decrement command will lower the priority from 130 to 90. However. it will then increment it by 40 back to 130 for HSRP group 1. when it comes back up. The interface will have the priority decremented by 40 for HSRP group 1. 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. E.Refer to the exhibit. B. They have questions about how these two devices will perform in the event of a device failure.

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E. we see that authentication is configured on R2. C. B. . but not on R1: This can be further verified by issuing the "show standby" command on each router.What issue is causing Router R1 and R2 to both be displayed as the HSRP active router for group 2? A. D. 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.

.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. They have questions about how these two devices will perform in the event of a device failure.

0c07. D.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.ac02 0000. C. F.0000. 0000. B.ac01 4000.ac02 4000.0010 0000.What is the virtual mac-address of HSRP group 1? A.0000.ac01 4000.0000. E.0000.0c07.0c07.0010. .