Cisco 351-001 Online Practice Questions and Exam Preparation

Cisco 351-001 Online Questions & Answers

• Question 891:

  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. No configuration must be added.
  B. stack ID
  C. IP address
  D. VLAN information
  E. VTP information
  A. No configuration must be added.

• Question 892:

  What are the two requirements for BGP to install a classful network into the BGP routing table? (Choose two)

  A. The AS contains the entire classfull network.
  B. A classful network statement with a lower administrative distance is in the routing table.
  C. Auto-summary is enabled.
  D. A classful network statement with a classful mask is in the routing table.
  E. Synchronization is enabled.
  F. Synchronization is disabled.
  C. Auto-summary is enabled.
  D. A classful network statement with a classful mask is in the routing table.

• Question 893:

  In which order of magnitude (time) is delay/latency measured when you use wide metrics in

  EIGRP?

  A. tens of microseconds
  B. picoseconds
  C. mamoseconds
  D. microseconds
  B. picoseconds

• Question 894:

  Which statement is true about Fast Link Pulses in Ethernet?

  A. They are used during collision detection.
  B. They are used only if the media type is optical.
  C. They are part of UniDirectional Link Detection.
  D. They are used during autonegotiation.
  D. They are used during autonegotiation.

  ---

  To make sure that your connection is operating properly, IEEE 802.3 Ethernet employs normal link pulses (NLPs), which are used for verifying link integrity in a 10BaseT system. This signaling gives you the link indication when you attach to the hub and is performed between two directly connected link interfaces (hub-to- station or station-to-station). NLPs are helpful in determining that a link has been established between devices, but they are not a good indicator that your cabling is free of problems. An extension of NLPs is fast link pulses. These do not perform link tests, but instead are employed in the autonegotiation process to advertise a device's capabilities.

  Reference: http://www.cisco.com/en/US/docs/internetworking/troubleshooting/guide/tr1904.html

• Question 895:

  Consider an OSPFv3 network with four parallel links between each pair of routers. Which measure can you use to reduce the CPU load and at the same time keep all links available for ECMP?

  A. Configure some interfaces as passive interface.
  B. Configure ipv6 ospf priority 0 on some interfaces.
  C. Configure some routers with a distribute list in ingress of the OSPFv3 process.
  D. Configure ipv6 ospf database-filter all out on some interfaces.
  D. Configure ipv6 ospf database-filter all out on some interfaces.

  ---

  To filter outgoing link-state advertisements (LSAs) to an Open Shortest Path First version 3 (OSPFv3) interface, use the ipv6 ospf database-filter all out command in interface configuration mode. This can be done on some of the links to reduce the CPU load while still ensuring that all links in the equal cost path are still being used.

• Question 896:

  From which component does an IS-IS router construct its link-state database?

  A. SPTs
  B. LSPs
  C. hello packets
  D. LSAs
  B. LSPs

• Question 897:

  DRAG DROP

  Drag and drop the router preference on the left to the correct routing sequence (from most preferred to least preferred) on the right.

  Select and Place:

  

  

• Question 898:

  Packets from a router with policy-based routing configured are failing to reach the next hop.

  Which two additions can you make to the router configuration to enable the packets to flow correctly? (Choose two.)

  A. Enable ip proxy-arp on the exiting interface.
  B. Specify the next hop as an address.
  C. Specify the next hop as an interface.
  D. Add a match-any permit statement to the route map.
  A. Enable ip proxy-arp on the exiting interface.
  B. Specify the next hop as an address.

  ---

  Here is an example:

  Router(config)#route-map Engineers permit 20 Router(config-route-map)#match ip address 2 Router(config-route-map)#set interface Ethernet1

  Here, instead of specifying a next-hop, it specifies that any packets matching this rule will be forwarded directly out the interface Ethernet1. This means that either the destination device must be on this segment, or there must be a router configured with Proxy ARP that can forward the packet to the ultimate destination.

• Question 899:

  On an MPLS L3VPN, which two tasks are performed by the PE router? (Choose two.)

  A. It exchanges VPNv4 routes with other PE routers.
  B. It typically exchanges iBGP routing updates with the CE device.
  C. It distributes labels and forwards labeled packets.
  D. It exchanges VPNv4 routes with CE devices.
  E. It forwards labeled packets between CE devices.
  A. It exchanges VPNv4 routes with other PE routers.
  C. It distributes labels and forwards labeled packets.

  ---

  MPLS VPN functionality is enabled at the edge of an MPLS network. The PE router performs these tasks:

  Exchanges routing updates with the CE router ?

  Translates the CE routing information into VPN version 4 (VPNv4) routes ?

  Exchanges VPNv4 routes with other PE routers through the Multiprotocol Border Gateway Protocol (MP-BGP) A PE router binds a label to each customer prefix learned from a CE router and includes the label in the network reachability information for the prefix that it advertises to other PE routers. When a PE router forwards a packet received from a CE router across the provider network, it labels the packet with the label learned from the destination PE router. When the destination PE router receives the labeled packet, it pops the label and uses it to direct the packet to the correct CE router. Label forwarding across the provider backbone is based on either dynamic label switching or traffic engineered paths. A customer data packet carries two levels of labels when traversing the backbone

  Reference: http://www.cisco.com/c/en/us/td/docs/routers/asr9000/software/asr9k_r4- 2/lxvpn/configuration/guide/vcasr9kv342/vcasr9k42v3.html

• Question 900:

  On which three options can Cisco PfR base its traffic routing? (Choose three.)

  A. Time of day
  B. An access list with permit or deny statements
  C. Load-balancing requirements
  D. Network performance
  E. User-defined link capacity thresholds
  F. Router IOS version
  C. Load-balancing requirements
  D. Network performance
  E. User-defined link capacity thresholds

  ---

  Key Advantages of using PfR for Load balancing: Utilization based load-balancing: PfR takes real-time link utilization into account when load balancing the links. This will ensure that a link will not go beyond a certain percentage of its maximum capacity (75% by default). Application Performance based Load Balancing: PfR does not randomly forward traffic through one link or another. It takes application performance requirements into consideration and then forwards the traffic through a link which meets the performance policy requirements. PfR also load balances the link at the same time. Bi-directional Solution: PfR is a bi-directional load balancing solution which influences outbound as well as in-bound traffic. Consolidated Centralized View: PfR offers consolidated and centralized view of the state of all external links in the network. At any given time, the network administrator can see the current link utilization (in kbps and percentage of its capacity), maximum link threshold, and the policies applied to the links in the network. Reference: http://docwiki.cisco.com/wiki/PfR:Solutions:InternetOutboundLoadBalancing