Cisco 642-889 Online Practice Questions and Exam Preparation

Cisco 642-889 Online Questions & Answers

• Question 1:

  Which Layer 2 encapsulations can AToM solution support with interworking IP feature enable?

  A. Ethernet to ATM AAL5
  B. ATM AAL5 to Frame Relay
  C. PPP to Frame Relay
  D. multipoint PPP to Frame Relay
  A. Ethernet to ATM AAL5

• Question 2:

  What is an advantage of using the Cisco EVC infrastructure to implement carrier-class Ethernet services that are not available on non-EVC-capable platforms?

  A. PW redundancy
  B. interworking support
  C. PW stitching support
  D. flexible frame-matching support and VLAN tag manipulation
  E. local cross-connect support
  D. flexible frame-matching support and VLAN tag manipulation

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  Reference: http://www.cisco.com/web/YU/events/expo_08/pdfs/Carrier_Ethernet_Marek_Moskal.pdf

• Question 3:

  Which option describes what differentiates a U-PE from N-PE?

  A. U-PE has all BGP routes from different BGP AFIs.
  B. N-PE has VRF configured and exported via BGP.
  C. U-PE is configured to peer BGP with all other BGP neighbors.
  D. N-PE is used to physically connect customer edge routers.
  A. U-PE has all BGP routes from different BGP AFIs.

• Question 4:

  Which option is the primary purpose of central service MPLS VPNs?

  A. provide customer access to provider resources while ensuring customers cannot communicate directly
  B. provide the provider access to customer resources while ensuring customers cannot communicate directly
  C. provide other service providers access to provider resources
  D. provide other service providers access to customer resources
  A. provide customer access to provider resources while ensuring customers cannot communicate directly

• Question 5:

  

  

  On PE7, what is the pseudowire ID that connects to the 10.8.1.1 neighbor?

  A. 70
  B. 80
  C. 123
  D. 0x840001
  E. 0x4000080
  C. 123

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  #show vfi

• Question 6:

  With Layer 3 MPLS VPN implementations on Cisco IOS XR PE routers, an interface is assigned to a VRF using the vrf command in which configuration mode?

  A. RP/0/RP0/CPU0:PE(config-vrf)#
  B. RP/0/RP0/CPU0:PE(config-if)#
  C. RP/0/RP0/CPU0:PE(config-bgp)#
  D. RP/0/RP0/CPU0:PE(config-bgp-af)#
  B. RP/0/RP0/CPU0:PE(config-if)#

• Question 7:

  Which command is used in Cisco IOS XE to display the contents of the LIB?

  A. show mpls ldp bindings
  B. show mpls ldp neighbors
  C. show mpls ldp discovery
  D. show mpls forwarding table
  D. show mpls forwarding table

• Question 8:

  

  Which option is the correct command to define an interface as Layer 2 on the Cisco ASR 9000?

  A. RP/0/RSP0/CPU0:R1(config)#int gigabitEthernet 0/6/0/0 l2transport
  B. RP/0/RSP0/CPU0:R1(config)#int gigabitEthernet 0/6/0/0 layer2
  C. RP/0/RSP0/CPU0:R1(config)#int gigabitEthernet 0/6/0/0 switchport
  D. RP/0/RSP0/CPU0:R1(config)#int gigabitEthernet 0/6/0/0 xconnect
  A. RP/0/RSP0/CPU0:R1(config)#int gigabitEthernet 0/6/0/0 l2transport

• Question 9:

  

  

  Which statement is correct regarding the pseudowire on connects PE7 to the 10.8.1.1 neighbor?

  A. The control word is enabled on both ends of the pseudowire
  B. The MTU size is 1500 bytes on both ends of the pseudowire
  C. Pseudowire backup is enabled
  D. The pseudowire is in the down state
  B. The MTU size is 1500 bytes on both ends of the pseudowire

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  show xconnect all show ip interfacebrief show mpls l2transport vc show cable l2-vpn xconnect mpls-vc-map

• Question 10:

  In which Cisco IOS XR configuration mode is the redistribute static command applied to enable the redistribution of static VRF routes between the PE routers?

  A. RP/0/RP0/CPU0:PE(config-router)#
  B. RP/0/RP0/CPU0:PE(config-bgp)#
  C. RP/0/RP0/CPU0:PE(config-bgp-vrf)#
  D. RP/0/RP0/CPU0:PE(config-bgp-vrf-af)#
  D. RP/0/RP0/CPU0:PE(config-bgp-vrf-af)#

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  References: http://www.cisco.com/en/US/docs/routers/asr9000/software/routing/configuration/guide/rcasr9kstat.html#wp1041359