4.1 Describe VPN Services 350-501 Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A small service provider wants to offer MPLS VPN services to its customers but does not own a nationwide backbone. It plans to lease transport from a larger carrier and run its own MPLS VPN service over that transport. The smaller provider needs to exchange VPNv4 routes with the larger carrier's backbone. Which architecture should be used?

   • ACarrier Supporting Carrier (CSC) with the smaller provider acting as a customer carrier
   • BIPsec tunnel between the smaller provider's PEs, bypassing the larger carrier's MPLS
   • CInter-AS Model A with VRF-to-VRF connections between the two providers
   • DLayer 2 VPN (L2VPN) using VPLS over the larger carrier's network
   Reveal Solution Discussion Select an answer first
2. 12foundation · easy

   In a Carrier Supporting Carrier (CSC) architecture, what does the customer carrier provide to its own customers?

   • AOnly physical connectivity, without any VPN services.
   • BA separate physical network for each customer.
   • CMPLS VPN services, such as Layer 3 VPNs, over the backbone of the carrier's carrier.
   • DInternet access only, not VPN services.
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   Which EVPN route type is used to advertise MAC addresses and their associated IP addresses?

   • ARoute Type 3: Inclusive Multicast Ethernet Tag route
   • BRoute Type 2: MAC/IP Advertisement route
   • CRoute Type 5: IP Prefix route
   • DRoute Type 1: Ethernet Auto-Discovery (A-D) route
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A service provider is deploying EVPN-based Ethernet services to a customer site that is dual-homed to two different PE routers. The customer expects fast failover if one PE fails, and the provider wants to avoid duplicate broadcast/multicast traffic during normal operation. Which EVPN mechanism should be enabled to meet these requirements?

   • AEthernet Segment (ES) route type 1 with auto-discovery only
   • BDesignated Forwarder (DF) election using route type 4
   • CSingle-active multihoming with no DF election
   • DAll-active multihoming with load balancing across both PEs
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   An EVPN deployment uses route type 3 (Inclusive Multicast Ethernet Tag route) to handle BUM traffic. A network engineer notices that broadcast traffic is being sent to all PEs in the EVPN instance, even those without any attached receivers. The engineer wants to optimize BUM traffic delivery. Which EVPN mechanism should be used to limit BUM traffic to only PEs that have active receivers?

   • AUse selective multicast (S-PMSI) with route type 3 for specific flows
   • BDisable BUM traffic in the EVPN instance
   • CUse route type 2 to advertise only known MAC addresses
   • DUse route type 4 (Ethernet Segment route) to filter BUM traffic
   Reveal Solution Discussion Select an answer first