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Question No : 1 - (Topic 1) Your customer requires a Layer 2 VPN service (draft-kompella-mpls-l2vpn). You are asked to describe the operational requirements on the PE router supporting this service. Which two statements are true in this scenario? (Choose two.) A. The ingress PE router associates multiple MPLS labels with the corresponding traffic flows. B. The ingress PE router for a traffic flow maintains the data-link connection identifier. C. The ingress PE router for a traffic flow removes the data-link connection identifier. D. The ingress PE router associates a single MPLS label with the corresponding traffic flows. Answer: B,D Explanation: Each PE transmits a single small chunk of information about every CE that the PE is connected to every other PE. That means each PE need only maintain a single chunk of information from each CE in each VPN and keep a single route to every site in every VPN. Question No : 2 - (Topic 1) JN0-661 Dumps Click the Exhibit button. R1 is exporting 2000:FEFE:100::/64 to R2 over the EBGP peering session as shown in the exhibit.
What will R1 use for this route's protocol next hop when advertising it to R2? A. 2000:FEFE:89::1 B. 172.16.1.1 C. 10.1.1.1 D. ::FFFF:172.16.1.1 JN0-661 Braindumps Answer: B Explanation: When a BGP router reports itself as the next hop, whether because of an explicit neighbor next-hop-self configuration or implicitly as a result of participating in an EBGP session, BGP allocates a new in label and adds an entry to the MPLS forwarding table, creating a label-to-next-hop mapping. Note: When a BGP router does not report itself as the next hop, whether because of an explicit neighbor next-hop-unchanged configuration or implicitly as a result of a participating in an IBGP session, BGP does not allocate a new in label. Instead, if the route is advertised as a labeled route, BGP uses the existing out label. This feature is used mainly on route reflectors. References: https://www.juniper.net/techpubs/en_US/junose16.1/topics/concept/mbgp-bgp-