2.3 Describe Network Virtualization Concepts 350-401 Practice Questions (Page 2)

Questions 6–10

1. 6expert · hard

   A network architect is comparing LISP and VXLAN for a new data center interconnect. The requirement is to support IP address mobility across sites while also providing Layer 2 extension for legacy applications. Which technology combination best meets this requirement?

   • AUse OTV for both requirements.
   • BUse only VXLAN for both IP mobility and Layer 2 extension.
   • CUse LISP for IP mobility and VXLAN for Layer 2 extension.
   • DUse only LISP for both IP mobility and Layer 2 extension.
   Reveal Solution Discussion Select an answer first
2. 7application · medium

   A company is deploying LISP to allow a host to move between two data centers without changing its IP address. The host's IP address is an EID, and the data center edge routers are xTRs. What must the xTRs do to ensure that the host's EID is reachable from the rest of the network?

   • AAdvertise the EID into the underlay routing protocol.
   • BConfigure a static route for the EID on all core routers.
   • CRegister the EID-to-RLOC mapping with the Map Server.
   • DUse VXLAN encapsulation for the EID traffic.
   Reveal Solution Discussion Select an answer first
4. 8expert · hard

   A service provider is deploying LISP to support multihoming for a customer site. The site has two xTRs, each connected to a different ISP. The customer wants to ensure that if one ISP link fails, traffic can still reach the site. Which LISP feature should be configured to provide this redundancy?

   • AConfigure a single xTR with two loopback interfaces.
   • BUse a PITR to handle failover.
   • CUse a PETR to handle failover.
   • DConfigure both xTRs to register the same EID with different RLOCs.
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5. 9application · medium

   A network engineer is troubleshooting a VXLAN overlay. Host A sends a broadcast frame, and the ingress VTEP needs to forward it to all other VTEPs in the same VNI. Which method can the VTEP use to forward this broadcast frame?

   • AEncapsulate the frame and send it to a multicast group associated with the VNI.
   • BSend the frame as unicast to the VTEP that has the destination MAC in its table.
   • CDrop the frame because broadcast is not supported in VXLAN.
   • DSend the frame to the default gateway for routing.
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6. 10expert · hard

   A network architect is designing a VXLAN overlay for a multi-tenant data center. The architect needs to support 5000 tenants, each with its own Layer 2 segment. The architect also wants to use IP multicast in the underlay to handle BUM traffic. Which design consideration is most important to ensure the overlay scales correctly?

   • AAssign a unique multicast group to each VNI and ensure the underlay supports the required number of groups.
   • BUse the same multicast group for all VNIs to conserve multicast addresses.
   • CUse a single VNI for all tenants and rely on VLANs for isolation.
   • DDisable multicast and use head-end replication for all VNIs.
   Reveal Solution Discussion Select an answer first