Failure Detection and Redundancy Protocols JN0-352 Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   How does VRRP ensure seamless failover when the master router fails?

   • AThe hosts must be reconfigured with the backup router's IP address
   • BThe backup router sends a gratuitous ARP to update all hosts with its physical MAC address
   • CThe backup router sends a broadcast message to all hosts to switch their default gateway
   • DThe backup router immediately takes over the virtual IP and MAC address
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2. 7application · medium

   In a VRRP group, the master router fails. What happens to the virtual router MAC address and the forwarding of traffic?

   • AThe backup router uses its own physical MAC address, and hosts must re-ARP.
   • BTraffic is dropped until a new master is elected and hosts are reconfigured.
   • CThe backup router takes over the virtual IP and the same virtual MAC address, so hosts see no change.
   • DThe virtual MAC address changes, and hosts must update their ARP cache.
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4. 8foundation · easy

   What is the virtual MAC address used by a VRRP group?

   • AA MAC address in the format 00:00:5E:00:01:XX, where XX is the VRRP group ID
   • BThe MAC address of the master router's physical interface
   • CThe MAC address of the backup router's physical interface
   • DA multicast MAC address used for VRRP advertisements
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5. 9foundation · easy

   What is the primary purpose of Bidirectional Forwarding Detection (BFD) in a Junos network?

   • ATo encrypt and authenticate routing protocol messages between peers
   • BTo synchronize the routing tables between two routers in a high-availability cluster
   • CTo detect forwarding path failures quickly and signal them to routing protocols for fast convergence
   • DTo provide a backup path for forwarding traffic when a primary link fails
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6. 10expert · hard

   You have two routers in a VRRP group. The master router is also running OSPF. You want to ensure that if OSPF adjacency with the upstream router is lost, the VRRP group fails over to the backup. What should you do?

   • AConfigure VRRP to track the OSPF protocol state directly.
   • BSet the backup router's priority higher than the master's.
   • CUse VRRP interface tracking to track the interface that carries the OSPF adjacency.
   • DEnable preemption on the backup router.
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