Cisco 642-883 Online Practice Questions and Exam Preparation

Cisco 642-883 Online Questions & Answers

• Question 51:

  

  There are how many IS-IS area(s) defined in this network Scenario?

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

• Question 52:

  An engineer is deciding what BFD implementation would be most appropriate for a legacy and unstable Packet Over SONET link. Which solution should be suggested?

  A. aggressive timers with the lowest possible multiplier
  B. slow timers withthe lowest possible multiplier
  C. aggressive timers with a very high multiplier
  D. averages of a sequence of ping test response times to the remote peer
  A. aggressive timers with the lowest possible multiplier

• Question 53:

  A customer is concerned about rerouting attacks on the IS-IS domain spanning the company. Which keychain management configuration is valid to authenticate IS-IS link- state information and provide a first response to this type of attack for Cisco IOS XR instances?

  A. configurekey chain isis-keyskey 1key-string myP@ssw0rdcryptographic-algorithm MD5send-lifetime 18:05:00 may 31 2014 infiniteaccept-lifetime 18:05:00 may 31 2014 infiniterouter isis 1Isp-password keychain isis-keys
  B. key chain cisco-xrkey 10key-string myP@ssw0rd!interface GigabitEthernet 3/1/1ip addressip_address subnet_maskip router isisisis authentication mode md5 level-1isis authentication key-chain cisco-xr level-1
  C. configurekey chain isis-keys!key 8cryptographic- algorithm MD5send-lifetime 18:05:00 may 31 2014 infiniteaccept-lifetime 18:05:00 may 31 2014 infiniterouter isis 1isp-password keychainisis-keys
  D. configurekey chain isis-keyskey-string myP@ssw0rdsend-lifetime 18:05:00 may 31 2014 infiniteaccept-lifetime 18:05:00 may 31 2014 infiniterouter isis 1isp-password keychain isis-keys
  A. configurekey chain isis-keyskey 1key-string myP@ssw0rdcryptographic-algorithm MD5send-lifetime 18:05:00 may 31 2014 infiniteaccept-lifetime 18:05:00 may 31 2014 infiniterouter isis 1Isp-password keychain isis-keys

• Question 54:

  Which option describes the configuration for a Cisco IOS XR OSPF router to give it the highest chances of becoming DR?

  A. ip ospf priority 0 under the OSPF interface statement
  B. ip ospf priority 0 under the OSPF area statement
  C. ip ospf priority 255 under the OSPF interface statement
  D. ip ospf priority 255 under the OSPF area statement
  E. Leave priority unchanged, but assign a high-numbered IP address on a loopback interface.
  F. Leave priority unchanged, but assign a high-numbered IP address on any physical interface.
  C. ip ospf priority 255 under the OSPF interface statement

• Question 55:

  A static default route has been inserted into the configuration of a Cisco IOS XE router. Which option advertises the route into the OSPF domain?

  A. router ospf 1 network 0.0.0.0 area 0 redistribute static subnets
  B. router ospf 1 redistribute static
  C. router ospf 1 redistribute static subnets
  D. router ospf 1 default-information originate
  D. router ospf 1 default-information originate

• Question 56:

  Which two statements about a transit AS are correct? (Choose two.)

  A. A transit AS has eBGP connection(s) to only one external AS.
  B. Routes between ASs are always exchanged via eBGP.
  C. A transit AS uses an IGP like OSPF or ISIS to propagate the external networks within the transit AS.
  D. Core routers within a transit AS normally use default routing to reach the external networks.
  E. iBGP sessions can be established between non directly connected routers.
  B. Routes between ASs are always exchanged via eBGP.
  E. iBGP sessions can be established between non directly connected routers.

• Question 57:

  When using the Cisco IOS XR route policy language to define a logical if-then-else condition, which logical operator has the highest precedence?

  A. AND
  B. OR
  C. NOT
  D. IS
  E. IN
  C. NOT

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  http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.0/routing/configuration/guide/rc3rpl.ht ml

  

  C:\Documents and Settings\user-nwz\Desktop\1.JPG

• Question 58:

  Refer to the exhibit.

  

  XR4 must be configured to advertise only AS 100 local subnets to AS 10. Which configuration on XR4 achieves this goal?

  A. as-path-set LOCAL ios-regex ^$ route-policy ADV if as-path in LOCAL then pass endif
  B. as-path-set LOCAL ios-regex '^100$' route-policy ADV if as-path in LOCAL then pass endif
  C. as-path-set LOCAL ios-regex '^$' route-policy ADV if as-path in LOCAL then pass endif
  D. as-path-set LOCAL ios-regex ^100$ route-policy ADV if as-path in LOCAL then pass endif
  C. as-path-set LOCAL ios-regex '^$' route-policy ADV if as-path in LOCAL then pass endif

• Question 59:

  

  What is the configured IS-IS circuit-type between the CE5 and PE5 routers and between the PE5 and PE6 routers? (Choose two.)

  A. Circuittype L1 between CE5 and PE5 4
  B. Circuittype L1/L2 between CE5 and PE5
  C. Circuittype L2 between CE5 and PE5
  D. Circuittype L1 between PE5 and PE6
  E. Circuittype L1/L2 between PE5 and PE6
  F. Circuittype L2 between PE5 and PE6
  A. Circuittype L1 between CE5 and PE5 4
  F. Circuittype L2 between PE5 and PE6

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  #show clns neighbor

• Question 60:

  Refer to the OSPF command exhibit.

  

  Which effect does the no-summary command option have?

  A. It will cause area 1 to be able to receive non-summarized inter-area routes.
  B. It will cause area 1 to not receive any inter-area routes and will use a default route to reach networks in other areas.
  C. It will cause area 1 to not receive any external routes and will use a default route to reach the external networks.
  D. It will convert the NSSA area into a NSSA totally stubby area.
  E. It will convert the stubby area into a NSSA.
  F. It will disable OSPF auto-summary.
  B. It will cause area 1 to not receive any inter-area routes and will use a default route to reach networks in other areas.

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  C:\Documents and Settings\user-nwz\Desktop\1.JPG