Online Access Free 642-883 Practice Test

Which option describes a function of an OSPF virtual link?

• A.Connect the two parts of a partitioned backbone through a nonbackbone area.
• B.Create a virtual connection between two routers from different areas.
• C.Create redundant path between an area and the backbone.
• D.Provide a backdoor link for traffic to flow through between areas.

Refer to the exhibit.

Which configuration is correct for XR4 for an e-BGP session with R1?

• A.router bgp 100
  neighbor 10.10.14.1
  remote-as 10
  address-family ipv4 unicast
• B.router bgp 100
  address-family ipv4 unicast
  neighbor 10.10.14.1
  remote-as 100
• C.router bgp 100
  address-family ipv4 unicast
  neighbor 10.10.14.1
  remote-as 100
  address-family ipv4 unicast
• D.router bgp 100
  neighbor 10.10.14.1
  remote-as 100

The S bit in the MPLS header is used for what purpose?

• A.To indicate if LDP is sync to the IGP
• B.To indicate the bottom level in the label stack
• C.To indicate if LDP is sync to the IGP
• D.To indicate the status of the LSP

Refer to the exhibit.

A service provider (AS65000) is interconnected to two upstream providers (ISP 1 neighbor
IP 192.168.1.1 and ISP 2 neighbor IP 192.168.1.2) via a single link in a peering exchange.
Which option can an engineer use to implement nonproprietary policies to make ISP 1 the preferred link for incoming and outgoing traffic from the local SP?

• A.route-map outgoing permit 10set-as -path prepend 65000 65000 65000route-map incoming permit 10set local-preference 1000router bgp 65000neighbor 192.168.1.1 route- map incoming inneighbor 192.168.1.2 route-map outgoing out
• B.set-as -path prepend 65000 65000 65000route-map incoming permit 10set weight
  100router bgp 65000neighbor 192.168.1.1 route-map incoming inneighbor 192.168.1.1 route-map outgoing out
• C.route-map outgoing permit 10set metric 100route-map incoming permit 10set weight
  100router bgp 65000neighbor 192.168.1.1 route-map incoming inneighbor 192.168.1.1 route-map outgoing out
• D.route-map outgoing permit 10set-as -path prepend 65000 65000 65000route-map incoming permit 10set local-preference 1000router bgp 65000neighbor 192.168.1.1 route- map incoming outneighbor 192.168.1.1 route-map outgoing in

On Cisco IOS XR Software, which set of commands is used to enable the gi0/0/0/1 interface for OSPF in area 0?

• A.interface gi0/0/0/0
  ip address 10.1.1.1 255.255.255.0
  !
  router ospf 1
  network 10.1.1.1 0.0.0.0 area 0
• B.router ospf 1
  address-family ipv4 unicast
  interface GigabitEthernet0/0/0/1
  area 0
• C.router ospf 1
  area 0
  interface GigabitEthernet0/0/0/1
• D.router ospf 1
  address-family ipv4 unicast
  interface GigabitEthernet0/0/0/1 area 0
• E.interface gi0/0/0/0
  ip address 10.1.1.1 255.255.255.0
  !
  router ospf 1
  network 10.1.1.1 255.255.255.255 area 0
• F.interface gi0/0/0/0
  ip address 10.1.1.1 255.255.255.0
  ip ospf 1 area 0