4.1 Describe VPN Services 350-501 Practice Questions (Page 4)

Questions 16–20

1. 16foundation · easy

   In an EVPN deployment using VXLAN as the data plane encapsulation, what is the role of the VXLAN Network Identifier (VNI)?

   • AIt specifies the multicast group used for BUM traffic.
   • BIt identifies the VXLAN overlay segment, which corresponds to a broadcast domain or VLAN.
   • CIt is used to encrypt the VXLAN traffic.
   • DIt identifies the BGP session between PE devices.
   Reveal Solution Discussion Select an answer first
2. 17foundation · easy

   What is the primary purpose of Multicast VPN (mVPN) in a service provider network?

   • ATo provide a single multicast group for all VPN customers.
   • BTo eliminate the need for PIM in the customer network.
   • CTo replace unicast routing with multicast for all traffic.
   • DTo provide multicast services, such as IPTV or video conferencing, over an MPLS VPN infrastructure.
   Reveal Solution Discussion Select an answer first
4. 18foundation · easy

   Which benefit is a key advantage of EVPN over traditional Ethernet bridging in service provider networks?

   • AIt supports only IPv4 unicast traffic, not multicast or broadcast.
   • BIt eliminates the need for any routing protocol, as EVPN relies solely on static configuration.
   • CIt reduces the risk of MAC address flapping and provides faster convergence by learning MAC addresses via BGP instead of data-plane flooding.
   • DIt requires a full mesh of physical connections between all customer sites to operate.
   Reveal Solution Discussion Select an answer first
5. 19foundation · easy

   Which benefit does mVPN provide compared to using separate multicast trees for each VPN?

   • AIt eliminates the need for any multicast protocol in the core.
   • BIt requires a separate physical network for each VPN.
   • CIt only supports broadcast traffic, not multicast.
   • DIt reduces the number of multicast trees in the core by aggregating traffic from multiple VPNs.
   Reveal Solution Discussion Select an answer first
6. 20foundation · easy

   What is the primary purpose of Ethernet VPN (EVPN) in a service provider network?

   • ATo enable only point-to-point Ethernet connections between two customer sites, similar to a traditional E-LINE service.
   • BTo provide a standards-based control plane for Ethernet services over an IP/MPLS network, enabling MAC learning and forwarding in the control plane rather than the data plane.
   • CTo provide a data-plane-only solution for Ethernet bridging, relying on traditional MAC learning in the forwarding plane.
   • DTo replace MPLS with a pure IP-based forwarding mechanism for all VPN services, eliminating the need for label switching.
   Reveal Solution Discussion Select an answer first