4.1 Describe VPN Services 350-501 Practice Questions (Page 5)

Questions 21–25

1. 21application · medium

   A service provider is implementing mVPN for a customer that has multicast sources and receivers in different sites. The provider wants to minimize the amount of multicast state in the core and avoid sending multicast traffic to sites that do not have active receivers. Which mVPN data plane mechanism should be used?

   • AMulticast over GRE tunnels with PIM on each tunnel
   • BPIM-SM with a single RP in the core
   • CSelective multicast tree (S-PMSI) established only when receivers are present
   • DInclusive multicast tree (I-PMSI) with all PEs in the VPN
   Reveal Solution Discussion Select an answer first
2. 22foundation · easy

   What is the purpose of EVPN Route Type 3 (Inclusive Multicast Ethernet Tag route)?

   • ATo advertise the default gateway IP address for the EVPN instance.
   • BTo advertise IP prefixes for inter-subnet routing.
   • CTo withdraw MAC addresses when a PE goes down.
   • DTo signal the multicast tunnel used for broadcast, unknown unicast, and multicast (BUM) traffic.
   Reveal Solution Discussion Select an answer first
4. 23foundation · easy

   What is a common configuration requirement for Inter-AS VPN Model B on the ASBRs?

   • AConfigure MP-BGP with the neighbor as the ASBR in the other AS, and allow the exchange of labeled VPNv4 routes.
   • BConfigure only an IGP between the ASBRs.
   • CConfigure a route reflector on each ASBR.
   • DConfigure a VRF on the inter-AS link.
   Reveal Solution Discussion Select an answer first
5. 24foundation · easy

   Which Inter-AS VPN model requires the exchange of VPNv4 routes with labels between ASBRs using MP-BGP?

   • AModel B
   • BModel C
   • CModel D
   • DModel A
   Reveal Solution Discussion Select an answer first
6. 25expert · hard

   A service provider is evaluating EVPN versus VPLS for a new Layer 2 VPN service. The provider has a large number of customer sites and needs to support fast convergence and avoid flooding of unknown unicast traffic. The provider also wants to integrate with existing MPLS backbone. Which technology should the provider choose?

   • AEVPN with BGP control plane and MAC learning in the control plane
   • BEVPN with PIM for control plane and data plane MAC learning
   • CVPLS with LDP signaling and data plane MAC learning
   • DVPLS with BGP auto-discovery and control plane MAC learning
   Reveal Solution Discussion Select an answer first