Cisco Certified Network Associate (CCNA) Practice Exam

What must be assigned to a VRRP group in order for it to function correctly?

1. Debugging number

2. Virtual IP address

3. Physical IP address

4. Subnet identifier

The correct answer is: Virtual IP address

For a Virtual Router Redundancy Protocol (VRRP) group to function correctly, it is essential to assign a virtual IP address. The virtual IP address serves as a shared address that hosts use to send traffic to the default gateway. This address is not assigned to any specific router but is instead associated with a group of routers, which act as a single virtual router. When one router in the group is designated as the master, it will respond to any packets directed to the virtual IP address. If the master router fails, the protocol ensures that another router in the group takes over as the master router seamlessly, thus maintaining the availability of the virtual IP address and ensuring continued communication for the hosts. The other options do not provide the necessary configurations for VRRP to function as intended. A debugging number, for example, does not play a role in the operational structure of VRRP, and both physical IP addresses and subnet identifiers pertain to individual device configurations rather than the shared functionality that VRRP is built upon.