4.1 Describe VPN Services 350-501 Practice Questions (Page 1)

Questions 1–5

1. 1application · medium

   A service provider is deploying a new multicast service for enterprise customers that use IPTV and video conferencing. The provider wants to carry multicast traffic over its MPLS VPN backbone while ensuring that each customer's multicast traffic is isolated and does not interfere with other customers. Which technology should the provider implement?

   • AMulticast VPN (mVPN) using BGP for signaling and PIM for data plane forwarding
   • BIGMP snooping on PE routers with multicast forwarding in the data plane
   • CPIM-SM in the global routing table with multicast RPs per customer
   • DIP multicast over GRE tunnels between customer sites
   Reveal Solution Discussion Select an answer first
2. 2foundation · easy

   In an Inter-AS mVPN deployment, what is a common challenge that segmented trees address?

   • AThe difficulty of building a multicast tree across AS boundaries due to PIM domain limitations.
   • BThe requirement to use a different multicast protocol in each AS.
   • CThe inability to use BGP for auto-discovery.
   • DThe need for a single PIM domain across all ASes.
   Reveal Solution Discussion Select an answer first
4. 3application · medium

   A service provider is deploying mVPN across an Inter-AS environment where two ASes are interconnected. The provider wants to use a profile that supports inter-AS multicast without requiring a full mesh of multicast trees between all PEs. Which mVPN profile is most suitable for this scenario?

   • AmVPN Profile 2 with selective trees only
   • BmVPN Profile 1 with inclusive trees and BGP auto-discovery
   • CPIM-SM with MSDP between ASes
   • DmVPN Profile 3 with segmented multicast trees
   Reveal Solution Discussion Select an answer first
5. 4application · medium

   Two service providers are interconnecting their MPLS networks to provide Layer 3 VPN services. They choose Inter-AS Model C to allow each provider to maintain its own internal BGP hierarchy. Which configuration is required on the ASBRs to enable VPNv4 route exchange between PEs in different ASes?

   • AConfigure VRF-to-VRF connections on ASBRs
   • BExchange labeled IPv4 routes between ASBRs and establish VPNv4 sessions between PEs
   • CEstablish VPNv4 sessions directly between ASBRs
   • DUse LDP between ASBRs to exchange VPN labels
   Reveal Solution Discussion Select an answer first
6. 5foundation · easy

   What is a key configuration requirement on the carrier's carrier routers in a CSC deployment?

   • AThey must run PIM for multicast.
   • BThey must have a VRF for each customer of the customer carrier.
   • CThey must be configured as route reflectors for the customer carrier's internal network.
   • DThey must run MPLS and exchange labeled VPNv4 routes with the customer carrier.
   Reveal Solution Discussion Select an answer first