Layer 3 VPN Concepts and Architecture JN0-664 Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A service provider is designing a Layer 3 VPN and needs to ensure that the same IPv4 prefix from two different customers can coexist in the provider's MP-BGP table. What is the primary mechanism that makes this possible?

   • AAssigning a unique route distinguisher to each customer's VRF, which is prepended to the IPv4 prefix to form a unique VPN-IPv4 address
   • BConfiguring the P routers to maintain separate routing tables for each customer
   • CUsing different route targets for each customer to prevent route conflicts in the BGP table
   • DAssigning different MPLS labels to each customer's routes to differentiate them in the BGP table
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2. 12foundation · easy

   What information is carried in an MP-BGP VPN-IPv4 route update that is used by the receiving PE to forward traffic to the correct CE?

   • AThe VPN label and the route target.
   • BThe route distinguisher and the customer's MAC address.
   • CThe transport label and the next-hop IP address.
   • DThe route distinguisher and the MPLS transport label.
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   Which protocol is used to distribute VPN-IPv4 routes between PE routers in a Layer 3 VPN?

   • ALDP
   • BMP-BGP
   • CIS-IS
   • DOSPF
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5. 14application · medium

   A customer site is connected to PE1 and sends a packet to a destination in a remote site connected to PE2. The packet arrives at PE1 and is forwarded to PE2 using MPLS. What is the role of the VPN label in this forwarding process?

   • AIt identifies the path through the provider core network to reach the egress PE
   • BIt identifies the customer edge router that should receive the packet
   • CIt identifies the egress PE and the specific VRF on that PE that should receive the packet
   • DIt identifies the route distinguisher of the customer's VRF
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6. 15foundation · easy

   What is a primary advantage of a full-mesh Layer 3 VPN topology?

   • AIt is the most scalable topology for large numbers of sites.
   • BIt simplifies the route target configuration by using a single route target for all sites.
   • CIt provides direct connectivity between all sites, reducing latency and avoiding a single point of failure.
   • DIt minimizes the number of VRF configurations required on each PE router.
   Reveal Solution Discussion Select an answer first