VRRP Object Tracking

B

Answer: B. It ensures the best VRRP router is the virtual router master for the group.

VRRP (Virtual Router Redundancy Protocol) is a protocol that allows multiple routers to participate in a virtual router group, sharing an IP address. One router is designated as the virtual router master, and the others act as backups in case the master fails. VRRP object tracking is a feature that allows VRRP to track the status of interfaces or other objects, such as the availability of a particular route, and use that information to determine which router should be the master.

For example, suppose a network has two routers, R1 and R2, and R1 is the virtual router master for a VRRP group. If the interface on R1 that is used to reach a certain network goes down, R1 will no longer be able to forward traffic to that network. VRRP object tracking can detect this and cause R2 to become the new virtual router master for the group, allowing traffic to continue to flow to the network without interruption.

VRRP object tracking can also be used to track the availability of other resources, such as a particular route. For example, if a router is connected to two ISPs and uses different routes for redundancy, VRRP object tracking can be used to detect if one of the routes becomes unavailable and switch the virtual router master to the other router.

Overall, VRRP object tracking is a useful feature for ensuring that the best VRRP router is always the virtual router master for the group and that traffic can continue to flow uninterrupted in the event of a failure.