Cisco 640-878 Online Practice Questions and Exam Preparation

Cisco 640-878 Online Questions & Answers

• Question 111:

  What are three common problems related to sessions not establishing between iBGP neighbors? (Choose three.)

  A. Incorrect MAC-address configured
  B. Unable to reach IP
  C. Network is not configured under router bgp x configuration
  D. Access list
  E. Firewall blocking all TCP traffic
  F. Redistribution is not configured under router bgp x configuration
  B. Unable to reach IP
  D. Access list
  E. Firewall blocking all TCP traffic

• Question 112:

  Refer to the two show output examples below. The switch with the e8ba.70b5.7180 MAC address is the root bridge for which VLAN or VLANs?

  

  

  

  A. VLAN 1
  B. VLAN 70
  C. VLAN 80
  D. VLANs 1, 70, and 80
  E. VLANs 1 and 70
  F. VLANs 1 and 80
  G. VLANs 70 and 80
  C. VLAN 80

• Question 113:

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

  A. The port must be an NNI type and must be in trunk mode.
  B. Use the rep segment number command to enable REP on the switch port.
  C. A REP segment cannot be wrapped into a ring topology. REP supports only a topology where each REP segment has two exit points via two edge switches.
  D. The port where the segment terminates is called the edge port.
  E. With REP, at least one port is always blocked in any given segment-that is, the alternate port.
  F. If a failure occurs within the segment, the blocked port goes to the forwarding state after it goes through the listening state and the learning state.
  A. The port must be an NNI type and must be in trunk mode.
  B. Use the rep segment number command to enable REP on the switch port.
  D. The port where the segment terminates is called the edge port.
  E. With REP, at least one port is always blocked in any given segment-that is, the alternate port.

• Question 114:

  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 115:

  A VLAN is a logical grouping of switch ports that belong to which two of these? (Choose two.)

  A. the same virtual switch cluster
  B. the same IP subnet
  C. the same collision domain
  D. the same broadcast domain
  E. the same virtual routing and forwarding instance
  B. the same IP subnet
  D. the same broadcast domain

• Question 116:

  Which segment protocol provides fast and predictable convergence (typically within 50 ms) in Layer 2 Ethernet ring topologies?

  A. Spanning Tree Protocol
  B. Flex Links
  C. Resilient Ethernet Protocol
  D. Spatial Reuse Protocol
  E. Resilient Packet Ring
  C. Resilient Ethernet Protocol

• Question 117:

  Which statement about the benefits of MPLS PHP is true?

  A. PHP is implemented to increase the performance on the egress edge LSR. PHP allows the egress edge LSR to perform only one lookup to route the IP packet based on destination IP address and routing table.
  B. PHP is implemented to increase the performance on the egress edge LSR. PHP enables the egress edge LSR to perform only one lookup based on the ingress label.
  C. PHP is implemented to increase the performance on the egress edge LSR. PHP enables the egress edge LSR to perform two lookups, first lookup based on the ingress label and a second route lookup based on the destination IP address.
  D. PHP is implemented to increase the performance on the LSR (P routers). PHP enables the LSR (P routers) to perform only one lookup based on the ingress label.
  E. PHP is implemented to increase the performance on the LSR (P routers). PHP enables the LSR (P routers) to perform only one route lookup based on the destination IP address.
  F. PHP is implemented to increase the performance on the LSR (P routers). PHP enables the LSR (P routers) to perform two lookups, first lookup based on the ingress label and a second route lookup based on the destination IP address.
  G. PHP is implemented to increase the performance on the ingress edge LSR. PHP enables the ingress edge LSR to perform only one lookup based on the ingress label.
  H. PHP is implemented to increase the performance on the ingress edge LSR. PHP enables the ingress edge LSR to perform two lookups, first lookup based on the ingress label and a second route lookup based on the destination IP address.
  A. PHP is implemented to increase the performance on the egress edge LSR. PHP allows the egress edge LSR to perform only one lookup to route the IP packet based on destination IP address and routing table.

• Question 118:

  On Cisco IOS XR software, what are the four valid address-family configuration command options in static route configuration mode? (Choose four.)

  A. address-family ipv4 unicast
  B. address-family ipv6 unicast
  C. address-family ipv4 multicast
  D. address-family ipv6 multicast
  E. address-family vpnv4
  F. address-family vpnv6
  A. address-family ipv4 unicast
  B. address-family ipv6 unicast
  C. address-family ipv4 multicast
  D. address-family ipv6 multicast

• Question 119:

  Which three are common ISP access network technologies? (Choose three.)

  A. DSL
  B. Cable modem
  C. DWDM
  D. MPLS
  E. PON
  F. MP-BGP
  A. DSL
  B. Cable modem
  E. PON

• Question 120:

  Refer to the partial Cisco IOS-XR configuration. What is the purpose of the for PFX to PEER command?

  ! mpls ldp label advertise disable for PFX to PEER !

  !

  A. To selectively enable LDP peering(s) with specific neighbors
  B. To selectively disable LDP peering(s) with specific neighbors
  C. To perform outbound filtering for local label advertisement for one or more prefixes to one or more peers
  D. To perform inbound filtering for local label advertisement for one or more prefixes from one or more peers
  C. To perform outbound filtering for local label advertisement for one or more prefixes to one or more peers