Online Access Free 642-889 Practice Test

Which three Layer 3 VPN technologies are based on the overlay model? (Choose three.)

• A.L2TPv3
• B.DMVPNs
• C.GRE/IPsec
• D.MPLS Layer 3 VPNs
• E.ATM virtual circuits
• F.Frame Relay virtual circuits

A regional operations center needs to deliver L3VPNs for a very large customer and needs a better understanding of what is necessary to implement an MPLS L3VPN. What is the biggest advantage to using the MPLS VPN model instead of the peer-to-peer model?

• A.Security is easier because of newer features for controlling route distribution on CE routers.
• B.IP private addressing is not precluded after implementing VRF instances.
• C.Except for Frame Relay as CE-to-PE data link encapsulation. the intelligence and control of a VPN no longer resides on the CE routers.
• D.The rviPLS VPN model does not require an ACL to filter undesired traffic.

Which two statements about implementing a separate MPLS VPN to provide customers Internet access are correct? (Choose two.)

• A.Customers will use separate interfaces for VPN and Internet access.
• B.The Internet gateway router will act as a CE router.
• C.Customers are assigned to the Internet VPN.
• D.Internet routes will be leaked from the PE global routing table to the customer VRF.

Which technology does an N-PE most likely use to pass traffic to the U-PE that is destined for the access switch?

• A.IS-IS
• B.pseudowire
• C.MPLS TE
• D.OSPF

Which option is a valid Cisco IOS XR BGP Layer 3 IPv4 MPLS VPN configuration?

• A.router bgp 100
  address-family vpnv4 unicast
  neighbor 2.2.2.2
  remote-as 100
  update-source Loopback0
  address-family vpnv4 unicast
  !
  vrf VPN_A
  rd 100:1
  address-family ipv4 unicast
  redistribute ospf 100
• B.router bgp 100
  address-family vpnv4 unicast
  neighbor 2.2.2.2
  remote-as 100
  update-source Loopback0
  address-family ipv4 unicast
  !
  vrf VPN_A
  rd 100:1
  address-family ipv4 unicast
  redistribute ospf 100
• C.router bgp 65001
  no bgp default ipv4-unicast
  bgp log-neighbor-changes
  neighbor 1.2.3.4 remote-as 65001 neighbor 1.2.3.4 update-source Loopback0 address-family vpnv4 neighbor 1.2.3.4 activate neighbor 1.2.3.4 send-community extended exit-address-family address-family ipv4 vrf VPN redistribute ospf 100
• D.router bgp 65001
  no bgp default ipv4-unicast
  bgp log-neighbor-changes
  neighbor 1.2.3.4 remote-as 65001
  neighbor 1.2.3.4 update-source Loopback0
  address-family vpnv4
  neighbor 1.2.3.4 activate
  exit-address-family
  address-family ipv4 vrf VPN
  redistribute ospf 100