Cisco 351-001 Online Practice Questions and Exam Preparation

Cisco 351-001 Online Questions & Answers

• Question 791:

  Which statement about passive interfaces is true?

  A. The interface with the OSPF passive interface configuration appears as a not-so-stubby network.
  B. The interface with the EIGRP passive interface configuration ignores routes after the exchange of hello packets.
  C. The interface with the IS-IS passive interface configuration sends the IP address of that interface in the link-state protocol data units.
  D. Passive interface can be configured on the interface for IS-IS.
  C. The interface with the IS-IS passive interface configuration sends the IP address of that interface in the link-state protocol data units.

  ---

  With IS-IS, passive interfaces are used to prevent unnecessary LSA packets out that interface, but the IP address of passive interfaces are still included in updates going out the other interfaces. This behavior is what enables the best practice of configuring loopback interfaces as passive, but still having the loopback be reachable.

• Question 792:

  Which two statements are characteristics of Ethernet private LAN circuits? (Choose two.)

  A. They support communication between two or more customer endpoints.
  B. They utilize more than one bridge domain.
  C. They support point-to-multipoint EVC.
  D. They support multipoint-to-multipoint EVC.
  A. They support communication between two or more customer endpoints.
  D. They support multipoint-to-multipoint EVC.

  ---

  An Ethernet Private LAN (EPLAN) is a multipointoultipoint EVC. EPLAN is an EVC that supports communication between two or more UNIs. In EPLAN, only one EVC can exist on a port and the port can have only one EFP.

  Reference:

  https://www.cisco.com/c/en/us/td/docs/optical/cpt/r9_3/configuration/guide/cpt93_configurat ion/cpt93_configuration_chapter_0100.pdf

• Question 793:

  Refer to the exhibit.

  

  Which two corrective actions could you take if EIGRP routes from R2 fail to reach R1? (Choose two.)

  A. Configure R2 to use a VRF to send routes to R1.
  B. Configure the autonomous system in the EIGRP configuration of R1.
  C. Correct the network statement on R2.
  D. Add the interface on R1 that is connected to R2 into a VRF.
  B. Configure the autonomous system in the EIGRP configuration of R1.
  D. Add the interface on R1 that is connected to R2 into a VRF.

  ---

  In this question we are running VRF Lite on R1. VRF Lite is also knows as "VRF without running MPLS". This is an example of how to configure VRF Lite with EIGRP:

  ip vrf FIRST rd 1:1 ! ip vrf SECOND rd 1:2 ! router eigrp 1 no auto-summary ! address-family ipv4 vrf FIRST network 10.1.1.1 0.0.0.0 no auto-summary autonomous-system 200 exit-address-family ! address-family ipv4 vrf SECOND network 10.1.2.1 0.0.0.0 no auto-summary autonomous-system 100 exit-address-family ! interface FastEthernet0/0 ip vrf forwarding FIRST ip address 10.1.1.1 255.255.255.0 ! interface FastEthernet0/1 ip vrf forwarding SECOND ip address 10.1.2.1 255.255.255.0

  The above example creates two VRFs (named "FIRST" and "SECOND"). VRF "FIRST" runs on EIGRP AS 200 while VRF "SECOND" runs on EIGRP AS 100. After that we have to add interfaces to the appropriate VRFs. From this example, back to our question we can see that R1 is missing the "autonomous-system ..." command under "address-family ipv4 vrf R2. And R1 needs an interface configured under that VRF. Note. R2 does not run VRF at all! Usually R2 resides on customer side.

• Question 794:

  Which three values are used to generate a unique bridge ID for each VLAN in PVST+? (Choose three)

  A. port cost
  B. max age
  C. spanning-tree MAC address
  D. port priority
  E. switch priority
  F. extended system ID
  C. spanning-tree MAC address
  E. switch priority
  F. extended system ID

• Question 795:

  Which option describes a limitation of Embedded Packet Capture?

  A. It can capture data only on physical interfaces and subinterfaces.
  B. It can store only packet data.
  C. It can capture multicast packets only on ingress.
  D. It can capture multicast packets only on egress.
  C. It can capture multicast packets only on ingress.

  ---

  Restrictions for Embedded Packet Capture

  In Cisco IOS Release 12.2(33)SRE, EPC is supported only on 7200 platform. EPC only captures multicast packets on ingress and does not capture the replicated packets on egress.

  Currently, the capture file can only be exported off the device; for example, TFTP or FTP servers and local disk.

  Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/epc/configuration/15-mt/epc- 15-mt-book/nm-packet-capture.html

• Question 796:

  What does a nonzero forwarding address indicate in a type-5 LSA?

  A. It indicates that this link-state ID is eligible for ECMP.
  B. It indicates that this router should have an OSPF neighbor relationship with the forwarding address before using this link-state ID.
  C. It indicates that the receiving router must check that the next hop is reachable in its routing table before using this link-state ID.
  D. It indicates that traffic can be directly routed to this next hop in shared segment scenarios where the external route source is directly connected.
  D. It indicates that traffic can be directly routed to this next hop in shared segment scenarios where the external route source is directly connected.

  ---

  The value of the forwarding address specified by the autonomous system boundary router (ASBR) can be either 0.0.0.0 or non-zero. The 0.0.0.0 address indicates that the originating router (the ASBR) is the next hop. The forwarding address

  is determined by these conditions:

  The forwarding address is set to 0.0.0.0 if the ASBR redistributes routes and OSPF is not enabled on the next hop interface for those routes. These conditions set the forwarding address field to a non-zero address:

  ASBR's next hop interface address falls under the network range specified in the router ospf command.

  Reference: http://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first- ospf/13682-10.html

• Question 797:

  DRAG DROP

  Drag and drop the QoS requirement on the left to the correct QoS technology on the right.

  Select and Place:

  

  

• Question 798:

  DRAG DROP

  Drag each show command on the left to the description of its output on a PE router on the right.

  Select and Place:

  

  

• Question 799:

  Which data plane protocol does EIGRP Over the Top use?

  A. MPLS
  B. GRE
  C. LISP
  D. IP-in-IP
  C. LISP

  ---

  The EIGRP Over the Top solution can be used to ensure connectivity between disparate Enhanced Interior Gateway Routing Protocol (EIGRP) sites. This feature uses EIGRP on the control plane and Locator ID Separation Protocol (LISP) encapsulation on the data plane to route traffic across the underlying WAN architecture. EIGRP is used to distribute routes between customer edge (CE) devices within the network, and the traffic forwarded across the WAN architecture is LISP encapsulated. Therefore, to connect disparate EIGRP sites, you must configure the neighbor command with LISP encapsulation on every CE in the network.

  Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/xe- 3s/ire-xe-3s-book/ire-eigrp-over-the-top.html

• Question 800:

  Refer to the exhibit.

  

  Why is network 172.16.1.0/24 not installed in the routing table?

  A. There is no ARP entry for 192.168.1.1.
  B. The router cannot ping 192.168.1.1.
  C. The neighbor 192.168.1.1 just timed out and BGP will flush this prefix the next time that the BGP scanner runs.
  D. There is no route for 192.168.1.1 in the routing table.
  D. There is no route for 192.168.1.1 in the routing table.

  ---

  Here we see that the next hop IP address to reach the 172.16.1.0 network advertised by the BGP peer is 192.168.1.1. However, the 192.168.1.1 IP is not in the routing table of R3 so it adds the route to the BGP table but marks it as inaccessible, as shown.