Cisco 351-001 Online Practice Questions and Exam Preparation

Cisco 351-001 Online Questions & Answers

• Question 551:

  Refer to the exhibit.

  

  R1, R2, and R3 have full network connectivity to each other, but R2 prefers the path through R3 to reach network 172.17.1.0/24. Which two actions can you take so that R2 prefers the path through R1 to reach 172.17.1.0/24? (Choose two.)

  A. Set the reference bandwidth to 10000 on R1, R2, and R3.
  B. Configure the cost on the link between R1 and R3 to be greater than 100 Mbps.
  C. Set the reference bandwidth on R2 only.
  D. Configure a manual bandwidth statement with a value of 1 Gbps on the link between R1 and R3.
  E. Modify the cost on the link between R1 and R2 to be greater than 10 Gbps.
  F. Configure a manual bandwidth statement with a value of 100 Mbps on the link between R1 and R2.
  A. Set the reference bandwidth to 10000 on R1, R2, and R3.
  B. Configure the cost on the link between R1 and R3 to be greater than 100 Mbps.

  ---

  By default, the reference bandwidth used in Cisco routers is 100Mbps, so FastEthernet and above will have a cost of 1, so a gigabit interface and 10GE interface will be equal with a fastethernet. This is not ideal. If we change the reference

  bandwidth to 100000 then the faster links will be used. Changing the reference bandwidth needs to be done on all routers in the OSPF network.

  Increasing the cost on the R1-R3 link will also cause the traffic to take the more direct route.

• Question 552:

  Which three statements about bridge assurance are true? (Choose three.)

  A. Bridge assurance must be enabled on both ends of a link.
  B. Bridge assurance can be enabled on one end of a link or on both ends.
  C. Bridge assurance is enabled on STP point-to-point links only.
  D. Bridge assurance is enabled on STP multipoint links only.
  E. If a bridge assurance port fails to receive a BPDU after a timeout, the port is put into a blocking state.
  F. If a bridge assurance port fails to receive a BPDU after a timeout, the port is put into an error disabled state.
  A. Bridge assurance must be enabled on both ends of a link.
  C. Bridge assurance is enabled on STP point-to-point links only.
  E. If a bridge assurance port fails to receive a BPDU after a timeout, the port is put into a blocking state.

  ---

  Bridge Assurance is enabled by default and can only be disabled globally. Also, Bridge Assurance can be enabled only on spanning tree network ports that are point-to-point links. Finally, both ends of the link must have Bridge Assurance enabled. With Bridge Assurance enabled, BPDUs are sent out on all operational network ports, including alternate and backup ports, for each hello time period. If the port does not receive a BPDU for a specified period, the port moves into the blocking state and is not used in the root port calculation. Once that port receives a BPDU, it resumes the normal spanning tree transitions.

  Reference:

  http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus5000/sw/configuration/guid e/cli/CLIConfigurationGuide/SpanningEnhanced.html

• Question 553:

  Which two options are restrictions of BGP ORF? (Choose two)

  A. It can be used only with IPv4 multicast.
  B. It requires access lists to match routes.
  C. It can be used only with eBGP.
  D. Multicast is not supported.
  E. It can be used only with iBGP.
  C. It can be used only with eBGP.
  D. Multicast is not supported.

• Question 554:

  Refer to the exhibit.

  

  Which technology can be used on the switch to enable host A to receive multicast packets for 239.2.2.2 but prevent host B from receiving them?

  A. IGMP filtering
  B. MLD snooping
  C. IGMP snooping
  D. MLD filtering
  C. IGMP snooping

  ---

  IGMP snooping is the process of listening to Internet Group Management Protocol (IGMP) network traffic. The feature allows a network switch to listen in on the IGMP conversation between hosts and routers. By listening to these conversations the switch maintains a map of which links need which IP multicast streams. Multicasts may be filtered from the links which do not need them and thus controls which ports receive specific multicast traffic.

• Question 555:

  Which three statements about VTP version 3 are true? (Choose three.)

  A. It supports other databases in addition to VLAN.
  B. It supports VLANs up to 4095.
  C. It supports the synchronization of switch configuration templates between switches in the domain.
  D. It supports the transfer of information about private VLAN structures.
  E. It supports the transfer of PVST+ configuration information.
  F. It supports RSTP.
  A. It supports other databases in addition to VLAN.
  B. It supports VLANs up to 4095.
  D. It supports the transfer of information about private VLAN structures.

  ---

  Much work has gone into improving the usability of VTP version 3 in three major areas: ?The new version of VTP offers better administrative control over which device is allowed to update other devices' view of the VLAN topology. The chance of unintended and disruptive changes is significantly reduced, and availability is increased. The reduced risk of unintended changes will ease the change process and help speed deployment. ?Functionality for the VLAN environment has been significantly expanded. Two enhancements are most beneficial for today's networks: ?In addition to supporting the earlier ISL VLAN range from 1 to 1001, the new version supports the whole IEEE 802.1Q VLAN range up to 4095. ?In addition to supporting the concept of normal VLANs, VTP version 3 can transfer information regarding Private VLAN (PVLAN) structures. ?The third area of major improvement is support for databases other than VLAN (for example, MST). Reference: http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-6500-series- switches/solution_guide_c78_508010.html

• Question 556:

  Refer to the exhibit.

  

  Which two actions can you take to allow the network 172.29.224.0/24 to be reachable from peer

  192.168.250.53? (Choose two)

  A. Modify the community list to match communities 64513:69040 attached to 172.29.224.0/24.
  B. Configure soft reconfiguration to peering 192.168.250.53.
  C. Modify the outbound route map to permit all additional traffic.
  D. Configure additional address families to peering 192.168.250.53.
  E. Modify the inbound route map to permit all additional traffic.
  F. Modify the community list to match community 64513:64090 attached to 172.29.224.0/24.
  C. Modify the outbound route map to permit all additional traffic.
  F. Modify the community list to match community 64513:64090 attached to 172.29.224.0/24.

• Question 557:

  DRAG DROP

  Drag and drop each STP port role on the left to the matching statement on the right.

  Select and Place:

  

  

• Question 558:

  Refer to the exhibit.

  

  Two multicast domains are configured as shown and connected with MSDP, but the two domains are unable to communicate. Which two actions can you take to correct the problem? (Choose two.)

  A. Change the peering IP address in AS 65220 to 10.0.0.20.
  B. Change the peering AS on R2 to 65210.
  C. Verify that UDP port 639 is open.
  D. Verify that TCP port 139 is open.
  E. Change the MSDP originator-id to GigabitEthernet 0/0/0 on both routers.
  F. Change the MSDP peering IP address on R2 to 172.16.1.13.
  A. Change the peering IP address in AS 65220 to 10.0.0.20.
  B. Change the peering AS on R2 to 65210.

• Question 559:

  Which BGP feature enables you to install a backup path in the forwarding table?

  A. soft reconfiguration
  B. prefix independent convergence
  C. route refresh
  D. synchronization
  B. prefix independent convergence

  ---

  To install a backup path into the forwarding table and provide prefix independent convergence (PIC) in case of a PE-CE link failure, use the additional-paths install backup command in an appropriate address family configuration mode. To prevent installing the backup path, use the no form of this command. To disable prefix independent convergence, use the disable keyword.

  Reference: http://www.cisco.com/c/en/us/td/docs/routers/crs/software/crs_r4- 2/routing/command/reference/b_routing_cr42crs/b_routing_cr42crs_chapter_01.html

• Question 560:

  Which two options are requirements for AToM support? (Choose two)

  A. Cisco Express Forwarding must be disabled.
  B. MPLS must be configured with an LSP in the SP core.
  C. MPLS must be enabled between the PE and CE routers.
  D. The PE routers must be able to communicate with each other over IP.
  E. IP routing must be configured between the PE and CE routers.
  B. MPLS must be configured with an LSP in the SP core.
  D. The PE routers must be able to communicate with each other over IP.