1. Home
  2. Cisco
  3. 642-661

Cisco 642-661 Online Practice Questions and Exam Preparation

642-661 Exam Details

  • Exam Code
    :642-661
  • Exam Name
    :CCIP Configuring BGP on Cisco Routers (BGP)
  • Certification
    :Cisco Certifications
  • Vendor
    :Cisco
  • Total Questions
    :181 Q&As
  • Last Updated
    :Dec 15, 2021

Cisco 642-661 Online Questions & Answers

  • Question 111:

    Which prefix-list will permit the 172.16.1.32 255.255.255.240 prefix?

    A. ip prefix-list test permit 172.0.0.0/8 le 30
    B. ip prefix-list test permit 172.16.1.0/28
    C. ip prefix-list test permit 172.16.0.0/16eq 28
    D. ip prefix-list test permit 172.0.0.0/8ge 29

  • Question 112:

    You are a customer who is multihomed to two different ISPs-one for primary and another for backup. Each ISP assigned you a different AS number. How should you implement your AS number?

    A. Use both AS numbers.
    B. Use the AS number assigned by the primary ISP.
    C. Use the AS number assigned by the backup ISP.
    D. Use the AS number assigned by one of the ISPs, then use AS-pathprepending to prepend the other AS number when connecting to the other ISP.
    E. Use the AS number assigned by one of the ISPs, then use AS number translation when connecting to the other ISP.

  • Question 113:

    What is the correct BGP configuration to have AS 65111 prefer the path to AS 65221 over the path to AS 65237 except for the traffic which originates in AS 65237?

    A. routerbgp 65111 neighbor 10.10.10.10 remote-as 65221 neighbor 10.20.20.20 remote-as 65237 neighbor 10.10.10.10 weight 160 neighbor 10.20.20.20 weight 150 neighbor 10.20.20.20 filter-list 1 weight 170 ! ip as-path access-list 1 permit _65237$
    B. routerbgp 65111 neighbor 10.10.10.10 remote-as 65221 neighbor 10.20.20.20 remote-as 65237 neighbor 10.10.10.10 weight 160 neighbor 10.20.20.20 weight 150 neighbor 10.20.20.20 access-group 1 weight 170 ! access-list 1 permit _65237$
    C. routerbgp 65111 neighbor 10.10.10.10 remote-as 65221 neighbor 10.20.20.20 remote-as 65237 neighbor 10.10.10.10 weight 160 neighbor 10.20.20.20 weight 150
    D. routerbgp 65111 neighbor 10.10.10.10 remote-as 65221 neighbor 10.20.20.20 remote-as 65237 neighbor 10.10.10.10 weight 160 neighbor 10.20.20.20 weight 150 neighbor 10.20.20.20 route-map test ! route-map test permit 10 match as-path _65221$

  • Question 114:

    What is the effect on existing BGP connections when Path MTU (PMTU) discovery is enabled?

    A. The connections are reset and negotiate MTU size.
    B. There is no effect on existing connections.
    C. After timing out, they will inherit the configured MTU size.
    D. They dynamically renegotiate the new MTU size.

  • Question 115:

    Given the following:

    router bgp 65102 neighbor 10.1.1.1 remote-as 65103 neighbor 10.2.2.2 remote-as 65104 neighbor 172.16.1.4 remote-as 65102 neighbor 10.1.1.1 route-map setlp in ! route-map setlp permit 10 match community 1 set local-preference 150 ! route-map setlp permit 20 ! ip community-list 1 permit 65103:150

    What will the configuration on R1 accomplish?

    A. Routes from AS 65103 marked with a Community of 65103: 150 will have the default Local Preference; all other routes will have a Local Preference of 150
    B. Routes from AS 65103 marked with a Community of 65103: 150 will have a Local Preference of 150; all other routes will have the default Local Preference.
    C. Routes from AS 65103 and AS 65104 marked with a Community of 65103: 150 will have the default Local Preference; all other routes will have a Local Preference of 150.
    D. Routes from AS 65103 and AS 65104 marked with a Community of 65103: 150 will have a Local Preference of 150; all other routes will have the default Local Preference.

  • Question 116:

    Refer to the BGP configurations and the show outputs in the diagram. What are two reasons why the 197.1.0.0/16 and 192.168.1.0/30 prefixes are not in the BGP table of WGR1? (Choose two.)

    A. The 197.1.0.0/16 prefix is not in the routing table of WGR1.
    B. The aggregate-address 197.1.0.0 255.255.0.0 summary-only command should be used instead of the network 197.1.0.0 mask 255.255.0.0 command.
    C. The 192.168.1.0/30 prefix is not in the routing table of WGR1.
    D. auto-summary is enabled.
    E. The network 192.168.1.0 command defaults to the classful mask.

  • Question 117:

    What are the three main BGP scaling issues for service providers? (Choose three.)

    A. BGP policy scaling issues
    B. IBGP full mesh scaling issues
    C. BGP to IGP redistribution scaling issue
    D. BGP updates and BGP table size scaling issues

  • Question 118:

    Which statement is correct about transit AS and iBGP?

    A. TheiBGP full mesh is a physical full mesh of all the routers within a transit AS.
    B. TheiBGP full mesh is a logical mesh of TCP sessions.
    C. Transit AS running full-meshiBGP requires synchronization to be enabled.
    D. Transit AS running full-meshiBGP requires next-hop-self to be enabled on all the core routers.

  • Question 119:

    What are two drawbacks when the Internet is accessed through a dedicated subinterface implementation? (Select two.)

    A. The VRP will leak routes into the global routing table.
    B. The PE router must run both IGP and BGP.
    C. The PE routers must perform Internet routing
    D. A separate physical link or specific WAN encapsulation is required.

  • Question 120:

    SIMULATION

Related Exams:

Tips on How to Prepare for the Exams

Nowadays, the certification exams become more and more important and required by more and more enterprises when applying for a job. But how to prepare for the exam effectively? How to prepare for the exam in a short time with less efforts? How to get a ideal result and how to find the most reliable resources? Here on Vcedump.com, you will find all the answers. Vcedump.com provide not only Cisco exam questions, answers and explanations but also complete assistance on your exam preparation and certification application. If you are confused on your 642-661 exam preparations and Cisco certification application, do not hesitate to visit our Vcedump.com to find your solutions here.