First Hop Redundancy (CCNP) Practice Questions

Answers and explanations appear when you work through the set above.

1. Which Virtual Router Redundancy Protocol (VRRP) virtual MAC address prefix is assigned when configuring VRRP v2?

   • 0000.5E00.01XX
   • 0000.0C07.ACXX
   • 0000.5E00.02XX
   • 0007.B400.10XX

2. In GLBP, which device responds to ARP requests for the virtual gateway IP address by assigning virtual MAC addresses to active clients?

   • Active Virtual Forwarder (AVF)
   • VRRP master router
   • Active Virtual Gateway (AVG)
   • Standby AVG

3. What is the default priority value assigned to a router configured with VRRP?

   • 1
   • 100
   • 150
   • 255

4. What MAC address structure is reserved for Virtual Router Redundancy Protocol (VRRPv2) groups?

   • 0000.0c07.acXX
   • 0000.5e00.01XX
   • 0007.b400.01XX
   • 0100.5e00.0001

5. Which First Hop Redundancy Protocol (FHRP) provides active load balancing across up to four virtual forwarders using a single virtual IP address?

   • Hot Standby Router Protocol (HSRPv1)
   • Hot Standby Router Protocol (HSRPv2)
   • Virtual Router Redundancy Protocol (VRRPv3)
   • Gateway Load Balancing Protocol (GLBP)

6. What happens when an active HSRP router's tracked WAN interface goes down and interface tracking is configured with a priority decrement of 20?

   • The router reloads its HSRP process and rejoins the group in the Listen state after 20 seconds.
   • Its priority drops by 20; a standby with higher priority and preempt enabled takes over as active.
   • The standby router clears its ARP cache and shuts its interfaces until the tracked link recovers.
   • The virtual IP changes to 0.0.0.0 until the tracked interface recovers and sends a new hello.

7. What is the default priority value for a Virtual Router Redundancy Protocol (VRRP) router, and what priority value is assigned if the router is the actual owner of the virtual IP address?

   • Default = 100; IP Address Owner = 255
   • Default = 1; IP Address Owner = 100
   • Default = 50; IP Address Owner = 1000
   • Default = 120; IP Address Owner = 200

8. How does VRRP respond when a tracked IP SLA probe fails and object tracking is configured to monitor that probe?

   • The master reloads its VRRP process and stays in the Initialize state until the probe succeeds again.
   • The master's priority is lowered by the tracking decrement, so a backup with higher priority can preempt it.
   • VRRP converts the group into GLBP mode so that the remaining forwarders share the load until the probe recovers.
   • The virtual IP is released to the DHCP server and every backup router stops sending advertisements.

9. In High Availability First-Hop Redundancy Protocols, why is preempt delay recommended when configuring an HSRP active router?

   • It delays the ARP table flush on the standby router so that hosts keep their gateway entry.
   • It gives OSPF or EIGRP time to converge before the recovering router reclaims the active role.
   • It stops unauthorized endpoints from spoofing the virtual MAC during an HSRP state change.
   • It keeps the standby router from sending hellos until the active router has finished booting.

10. Why is a preempt delay timer recommended when configuring HSRP preemption (standby preempt delay minimum <seconds>) on a core switch?

    • To let OSPF or BGP converge after a reboot before the switch reclaims the active role.
    • To delay the switch's ARP replies for the virtual IP by 30 seconds after every failover.
    • To suspend the HSRP hello and hold timers while the switch CPU is under a heavy load.
    • To force client PCs to release and renew their DHCP leases after the switch reboots.