VRRP Questions

Here you will find answers to (VRRP) Questions

Note: The main difference between HSRP and VRRP is that HSRP is a Cisco proprietary protocol while VRRP is an open standard. In VRRP, the active router is referred to as the master virtual router.

Question 1

Refer to the exhibit. Which Virtual Router Redundancy Protocol (VRRP) statement is true about the roles of the master virtual router and the backup virtual router?

A. Router A is the master virtual router, and Router B is the backup virtual router. When Router A fails, Router B will become the master virtual router. When Router A recovers, Router B will maintain the role of master virtual router.
B. Router A is the master virtual router, and Router B is the backup virtual router. When Router A fails, Router B will become the master virtual router. When Router A recovers, it will regain the master virtual router role.
C. Router B is the master virtual router, and Router A is the backup virtual router. When Router B fails, Router A will become the master virtual router. When Router B recovers, it will regain the master virtual router role.
D. Router B is the master virtual router, and Router A is the backup virtual router. When Router B fails, Router A will become the master virtual router. When Router B recovers, Router A will maintain the role of master virtual router.

Answer: B

Explanation

RouterA is the master virtual router because of higher priority value.

By default, a preemptive scheme is enabled whereby a higher priority backup virtual router that becomes available takes over for the backup virtual router that was elected to become master virtual router. You can disable this preemptive scheme using the no vrrp preempt command. If preemption is disabled, the backup virtual router that is elected to become master virtual router remains the master until the original master virtual router recovers and becomes master again.

-> B is correct.

(Reference: http://www.cisco.com/en/US/docs/ios/12_0st/12_0st18/feature/guide/st_vrrpx.html)

Question 2

Which one of the statements below correctly describes the Virtual Router Redundancy Protocol (VRRP), which is being used in the Company network to provide redundancy?

A. A VRRP group has one active and one or more standby virtual routers.
B. A VRRP group has one master and one or more backup virtual routers.
C. A VRRP group has one master and one redundant virtual router.

Answer: B

Explanation

Unilike HSRP (which has one active router, one standby router and many listening routers), a VRRP group has one master router and one or more backup routers. All backup routers are in backup state.

Question 3

Which router redundancy protocol cannot be configured for interface tracking?

A. GLBP
B. HSRP
C. RPR
D. VRRP
E. SLB
F. RPR+

Answer: D

Explanation

VRRP cannot directly track an interface status but interfaces can be tracked through a tracked object. Notice that HSRP and GLBP can track both object and interface status.