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Cisco 642-883 Online Practice Questions and Exam Preparation

642-883 Exam Details

  • Exam Code
    :642-883
  • Exam Name
    :Deploying Cisco Service Provider Network Routing
  • Certification
    :Cisco Certifications
  • Vendor
    :Cisco
  • Total Questions
    :174 Q&As
  • Last Updated
    :Dec 08, 2021

Cisco 642-883 Online Questions & Answers

  • Question 81:

    In which network environment is IS-IS adjacency check important?

    A. in a multitopology environment where there are different instances of IS-IS running on the same router
    B. in an IPv4/IPv6 environment and running single-topology IS-IS
    C. when a level L1/L2 IS-IS router is neighboring with a Level 1 only or Level 2 only router
    D. when IS-IS neighbors are in an NBMA environment like over Frame Relay
    E. when IS-IS neighbors are in a broadcast environment like an Ethernet LAN

  • Question 82:

    A Network Operation Center requires support to understand OSPFv3 neighborship operations. During a migration, two OSPFv3 routers became adjacent even though no common subnets were configured on the link interfaces. Which statement explains this problem?

    A. This problem is a bug in Cisco IOS XE, which requires a case tobe open with Cisco TAC and an immediate Cisco IOS upgrade to avoid security breaches and rerouting attacks.
    B. IPv6 needs only the link-local address to from an OSPFv3 neighborship.
    C. The Network Operation Center Engineers did not notice a supernet configured on one end of the IPv6 link.
    D. The Network Operation Center Engineers did not add the secondary keyword after the IPv6 address, which causes the router to overwrite the main address.

  • Question 83:

    Which configuration allows incoming traffic on the FastEthernet 0/1 interface of a router to be policy-routed via the next-hop 192.168.10.1, when it is reachable and otherwise be routed normally?

    A. interface Fa0/1ip policy route-map-nh-reachableroute-map nh-reachable permit 10set ip next-hop verify-availabilityroute-map nh-reachable permit 20set ip next-hop 192.168.10.1
    B. interface Fa0/1ip policy route-map-nh-reachableroute-map nh-reachable permit 10set ip next-hop verify-availability 192.168.10.1route-map nh-reachable permit 20
    C. interface Fa0/1Ip policy route-map-nh-reachableroute-map nh-reachable permit 10set ip next-hop 192.168.10.1 trackroute-map nh-reachable permit 20
    D. interface Fa0/1ip policy route-map-nh-reachableroute-map nh-reachable permit 10set ip next-hop 192.168.10.1route-map nh-reachable permit 20set default interface

  • Question 84:

    A network engineer is configuring IS-IS in Cisco IOS XR. Where is BFD configured?

    A. RP/0/RSP0/CPU0:router(config-isis-if)#
    B. RP/0/RSP0/CPU0:router(config)#
    C. RP/0/RSP0/CPU0:router(config-bfd)#
    D. RP/0/RSP0/CPU0:router(config-isis-if-af)#

  • Question 85:

    What is defined by using the Cisco IOS XR policy-global configuration command?

    A. the default BGP route policy
    B. global variables that can be referenced by any route policy
    C. the global default route policy
    D. hierarchical route policy
    E. nested route policy

  • Question 86:

    Which option is a mechanism that can be implemented between two eBGP peers to communicate updates that each peer needs from the other?

    A. ORF
    B. route map
    C. ACL
    D. prefix list

  • Question 87:

    Which three potential issues can cause an OSPF adjacency to not come up? (Choose three.)

    A. wrong area configured on OSPF peers
    B. wrong authentication key configured on OSPF peers
    C. different OSPF instance numbers configured on OSPF peers
    D. different OSPF instances and VRFs configured with the command: router ospf vrf
    E. having the no passive-interface statement configured for the interfaces on which OSPF adjacencies are expected to form
    F. Layer 2 connectivity problems on the shared medium of the participating OSPF-enabled routers

  • Question 88:

    Which option describes how an engineer must configure route summarization on a Cisco IOS XE OSPF-enabled network of routers?

    A. area range command under the router OSPF process of the ABR
    B. area range command under the router OSPF process of the router wanting to originate the summary route from
    C. summary-address command under the OSPF process of the ABR
    D. summary-address command under the OSPF process of the router wanting to originate the summary route from
    E. network statement for the aggregate address under the router OSPF process on the ABR
    F. network statement for the aggregate address under the router OSPF process of the router wanting to originate the summary route from

  • Question 89:

    Which statement best describes the function of a BGP af-group?

    A. Use templates in different neighbors so it makes the BGP implementation easier.
    B. Group different address family neighbors inside BGP.
    C. Create a group of neighbors that can inherit address family configuration inside BGP.
    D. Substitute the class maps inside BGP on Cisco IOS XR devices.

  • Question 90:

    A service provider is running BGP with clients at the edge of the network. The service provider sees that routing updates from one site are being dropped when the other site receives them. Which feature fixes this issue?

    A. EBGP multihop
    B. inter-AS peering
    C. AS-override
    D. allow-AS in

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