Cisco 640-878 Online Practice Questions and Exam Preparation

Cisco 640-878 Online Questions & Answers

• Question 21:

  The permit 172.16.32.0 0.0.15.255 access-list entry permits exactly which IP address range?

  A. 172.16.32.0 to 172.16.47.255
  B. 172.16.32.0 to 172.16.48.255
  C. 172.16.32.0 to 172.16.62.255
  D. 172.16.32.0 to 172.16.63.255
  E. 172.16.32.0 to 172.16.64.255
  F. 172.16.32.0 to 172.16.255.255
  A. 172.16.32.0 to 172.16.47.255

• Question 22:

  Within an MPLS domain, which table is used by the label switch routers to make forwarding decisions when a labeled packet is received?

  A. FIB
  B. RIB
  C. LFIB
  D. LIB
  E. CEF
  C. LFIB

• Question 23:

  During the BGP route selection process on Cisco routers, which BGP attribute is examined first, to determine the best path to use?

  A. AS path
  B. MED
  C. local preference
  D. weight
  E. origin
  D. weight

• Question 24:

  What three statements about REP configurations on a Cisco ME 3400 switch port are true? (Choose three.)

  A. The port must be an NNI type and must be in trunk mode.
  B. The rep segment number command is used to enable REP on the switch port.
  C. A REP segment cannot be wrapped into a ring topology.
  D. The port where the segment terminates is called the edge port.
  E. If a failure occurs within the segment, the blocked port goes to the forwarding state
  F. Ports are never blocked in a given segment
  A. The port must be an NNI type and must be in trunk mode.
  B. The rep segment number command is used to enable REP on the switch port.
  D. The port where the segment terminates is called the edge port.

• Question 25:

  You have installed a new router and configured OSPF on it. However, this new router is not able to establish an OSPF neighbor relationship with the neighbor OSPF router. Which four conditions could cause this problem? (Choose four.)

  A. mismatched OSPF hello/dead interval between the new router and the neighbor router
  B. mismatched OSPF area ID between the new router and the neighbor router
  C. mismatched OSPF authentication data between the new router and the neighbor router
  D. mismatched OSPF router ID between the new router and the neighbor router
  E. mismatched interface MTU between the new router and the neighbor router
  F. mismatched interface bandwidth between the new router and the neighbor router
  A. mismatched OSPF hello/dead interval between the new router and the neighbor router
  B. mismatched OSPF area ID between the new router and the neighbor router
  C. mismatched OSPF authentication data between the new router and the neighbor router
  E. mismatched interface MTU between the new router and the neighbor router

• Question 26:

  Which two statements about the link state routing process are true? (Choose two.)

  A. It uses the DUAL algorithm.
  B. It uses metrics such as AS path.
  C. All routers in the area have link state databases.
  D. The administrative distance is 1 by default.
  E. Each router in the area floods LSPs to all neighbors.
  C. All routers in the area have link state databases.
  E. Each router in the area floods LSPs to all neighbors.

• Question 27:

  On Cisco IOS XR software, how is LDP enabled on an interface?

  A. LDP is automatically enabled globally on all interfaces, when ip cef is enabled globally.
  B. LDP is enabled on each interface, using the mpls ip interface configuration command.
  C. LDP is enabled on each interface, using the interface command under mpls ldp (MPLS LDP configuration mode).
  D. LDP is enabled globally on all interfaces, using the mpls ldp global configuration command.
  E. LDP is enabled globally on all interfaces, using the mpls ip global configuration command.
  C. LDP is enabled on each interface, using the interface command under mpls ldp (MPLS LDP configuration mode).

• Question 28:

  Refer to the exhibit.

  

  The access list has been configured on the Gi0/0/0/0 interface in the inbound direction. Which four packets that are sourced from 10.1.1.1 TCP port 1060, if they are routed to the Gi0/0/0/0 interface, will be permitted? (Choose four)

  A. destination IP address: 192.168.15.37, destination TCP port: 8080
  B. destination IP address: 192.168.15.41, destination TCP port: 8080
  C. destination IP address: 192.168.15.49, destination TCP port: 8080
  D. destination IP address: 192.168.15.36, destination TCP port: 80
  E. destination IP address: 192.168.15.46, destination TCP port: 80
  F. destination IP address: 192.168.15.49, destination TCP port: 80
  C. destination IP address: 192.168.15.49, destination TCP port: 8080
  D. destination IP address: 192.168.15.36, destination TCP port: 80
  E. destination IP address: 192.168.15.46, destination TCP port: 80
  F. destination IP address: 192.168.15.49, destination TCP port: 80

• Question 29:

  On Cisco IOS XR software, which set of commands enables OSPF area 0 on the Gi0/0/0/0 interface that has an IPv4 IP address of 192.168.1.1/24?

  A. router ospf 1 network 192.168.1.1 0.0.0.0 area 0
  B. router ospf 1 network 192.168.1.1 255.255.255.255 area 0
  C. router ospf 1 area 0 interface gi0/0/0/0
  D. router ospfv3 1 network 192.168.1.1 0.0.0.0 area 0
  E. router ospfv3 1 network 192.168.1.1 255.255.255.255 area 0
  F. router ospfv3 1 area 0 network 192.168.1.0
  G. router ospfv3 1 area 0 interface gi0/0/0/0
  C. router ospf 1 area 0 interface gi0/0/0/0

• Question 30:

  Which spanning-tree mode uses the name command to configure a region name?

  A. MST
  B. PVST+
  C. PVRST+
  D. RSTP
  A. MST