Cisco 351-001 Online Practice Questions and Exam Preparation

Cisco 351-001 Online Questions & Answers

• Question 751:

  Refer to the exhibit.

  

  Why is the neighbor relationship between R2 and R4 shown as ES-IS?

  A. because there is an MTU mismatch between R2 and R4
  B. because interface S3/0 of R4 is configured as L1/L2
  C. because interface S3/0 of R2 is configured as L1
  D. because there is a hello interval mismatch between R2 and R4
  C. because interface S3/0 of R2 is configured as L1

  ---

  With IS-IS we will see ES-IS when one of the following is true:

  uk.co.certification.simulator.questionpool.PList@d4846d0 So in this question because we do not know about the other side's "show CLNS neighbor" A must be the better choose.

• Question 752:

  Which IP SLA operation type uses IP to measure the round-trip time between a router and a device?

  A. HTTP
  B. ICMP Echo
  C. ICMP Path Jitter
  D. UDP Jitter for VoIP
  B. ICMP Echo

• Question 753:

  Which statement about the OSPF Loop-Free Alternate feature is true?

  A. It is supported on routers that are configured with virtual links.
  B. It is supported in VRF OSPF instances.
  C. It is supported when a traffic engineering tunnel interface is protected.
  D. It is supported when traffic can be redirected to a primary neighbor.
  B. It is supported in VRF OSPF instances.

  ---

  Restrictions for OSPF IPv4 Remote Loop-Free Alternate IP Fast Reroute The OSPF IPv4 Remote Loop-Free Alternate IP Fast Reroute feature is not supported on devices that are virtual links headends. The feature is supported only in global VPN routing and forwarding (VRF) OSPF instances. The only supported tunneling method is MPLS. You cannot configure a traffic engineering (TE) tunnel interface as a protected interface. Use the MPLS Traffic Engineering--Fast Reroute Link and Node Protection feature to protect these tunnels. For more information, see the "MPLS Traffic Engineering--Fast Reroute Link and Node Protection" section in the Multiprotocol Label Switching Configuration Guide. You can configure a TE tunnel interface in a repair path, but OSPF will not verify the tunnel's placement; you must ensure that it is not crossing the physical interface that it is intended to protect. Not all routes can have repair paths. Multipath primary routes might have repair paths for all, some, or no primary paths, depending on the network topology, the connectivity of the computing router, and the attributes required of repair paths. Devices that can be selected as tunnel termination points must have a /32 address advertised in the area in which remote LFA is enabled. This address will be used as a tunnel termination IP. If the device does not advertise a /32 address, it may not be used for remote LFA tunnel termination. All devices in the network that can be selected as tunnel termination points must be configured to accept targeted LDP sessions using the mpls ldp discovery targeted-hello accept command.

  Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_ospf/configuration/xe- 3s/iro-xe-3s-book/iro-ipfrr-lfa.html

• Question 754:

  Refer to the exhibit.

  

  When the link between RtrB and RtrC goes down, multicast receivers stop receiving traffic from the source for multicast group 229.1.1.1.Which solution will resolve this?

  A. adding a static mroute on RtrB and RtrF
  B. adding a static unicast route on RtrB and RtrF
  C. creating a GRE tunnel between RtrB and RtrD
  D. enabling PIM sparse mode on both ends of the link between RtrB and RtrF
  D. enabling PIM sparse mode on both ends of the link between RtrB and RtrF

  ---

  For multicast traffic to flow, PIM must be enabled on all routers in the path of the multicast stream.

• Question 755:

  Refer to the exhibit.

  

  If a port is configured as shown and receives an untagged frame, of which VLAN will the untagged frame be a member?

  A. VLAN 1
  B. VLAN 2
  C. VLAN 3
  D. VLAN 4
  B. VLAN 2

  ---

  When typing:

  Switch(config-if)#switchport mode?

  access Set trunking mode to ACCESS unconditionally dynamic Set trunking mode to dynamically negotiate access or trunk mode trunk Set trunking mode to TRUNK unconditionally

  and

  Switch(config-if)#switchport mode dynamic?

  auto Set trunking mode dynamic negotiation parameter to AUTO desirable Set trunking mode dynamic negotiation parameter to DESIRABLE So if we configure Fa0/1 as dynamic auto mode, it will not initiate any negotitation but waiting for the

  other end negotiate to be a trunk with DTP. If the other end does not ask it to become a trunk then it will become an access port. Therefore when using the "show interface fastEthernet0/1 switchport" command we will see two output lines "

  Administrative Mode. dynamic auto" and " Operational Mode. static access" Note. To set this port to VLAN 2 as the output above just use one additional command.

  "switchport access vlan 2".

  Now back to our question, from the output we see that Fa0/1 is operating as an access port on VLAN 2 so if it receive untagged frame it will suppose that frame is coming from VLAN 2.

• Question 756:

  Which two tasks are required for configuring SNMP to send traps on a Cisco IOS device? (Choose two.)

  A. Create access controls for an SNMP community.
  B. Configure SNMP notifications.
  C. Configure the SNMP agent.
  D. Configure SNMP status monitoring and troubleshooting.
  E. Configure SNMP server group names.
  F. Configure the SNMP server engine ID.
  A. Create access controls for an SNMP community.
  B. Configure SNMP notifications.

  ---

  The best current practices recommend applying Access Control Lists (ACLs) to community strings and ensuring that the requests community strings are not identical to notifications community strings. Access lists provide further protection

  when used in combination with other protective measures.

  This example sets up ACL to community string:

  access-list 1 permit 1.1.1.1 snmp-server community string1 ro 1 SNMP Notifications

  A key feature of SNMP is the ability to generate notifications from an SNMP agent. These notifications do not require that requests be sent from the SNMP manager. Unsolicited (asynchronous) notifications can be generated as traps or

  inform requests. Traps are messages alerting the SNMP manager to a condition on the network. Inform requests (informs) are traps that include a request for confirmation of receipt from the SNMP manager. Notifications can indicate

  improper user authentication, restarts, the closing of a connection, loss of connection to a neighbor router, or other significant events.

  Reference:

  http://www.cisco.com/c/en/us/td/docs/ios/12_2/configfun/configuration/guide/ffun_c/fcf014.h tml#wp1007320

• Question 757:

  Refer to the exhibit.

  

  Which two statements about the output are true? (Choose two.)

  A. It indicates that prefix aggregation cache export is enabled on the device.
  B. It was obtained with the show ip cache flow command.
  C. It indicates that the device is using NetFlow version 5.
  D. It indicates that the flows are being sent to a destination using an RFC1918 address.
  C. It indicates that the device is using NetFlow version 5.
  D. It indicates that the flows are being sent to a destination using an RFC1918 address.

  ---

  C. The fourth line shows that Version 5 is being used. D. The third line shows that the destination server is 10.5.206.250, which of course is a private, RFC 1918 address.

• Question 758:

  Which two statements are true about RSTP? (Choose two.)

  A. By default, RTSP uses a separate TCN BPDU when interoperating with 802.1D switches.
  B. By default, RTSP does not use a separate TCN BPDU when interoperating with 802.1D switches.
  C. If a designated port receives an inferior BPDU, it immediately triggers a reconfiguration.
  D. By default, RTSP uses the topology change TC flag.
  E. If a port receives a superior BPDU, it immediately replies with its own information, and no reconfiguration is triggered.
  B. By default, RTSP does not use a separate TCN BPDU when interoperating with 802.1D switches.
  D. By default, RTSP uses the topology change TC flag.

  ---

  The RSTP does not have a separate topology change notification (TCN) BPDU. It uses the topology change (TC) flag to show the topology changes.

  Reference:

  http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2950/software/release/12- 1_9_ea1/configuration/guide/scg/swmstp.html

• Question 759:

  Which three characteristics are shared by subinterfaces and associated EVNs? (Choose three.)

  A. IP address
  B. routing table
  C. forwarding table
  D. access control lists
  E. NetFlow configuration
  A. IP address
  B. routing table
  C. forwarding table

• Question 760:

  What is the minimum link MTU value for IPv6?

  A. 68 bytes
  B. 1200 bytes
  C. 500 bytes
  D. 1280 bytes
  D. 1280 bytes