Which of the following is true about HSRP groups?

HSRP (Hot Standby Router Protocol) groups are used in failover scenarios to ensure high availability of routers. The key aspect regarding HSRP groups is that they can actually be numbered from 0 to 255, which means there are 256 possible group numbers. This range allows for flexibility in assigning group numbers to different router interfaces depending on the configuration needs of a network.

When utilizing HSRP, administrators can choose from any of these numbers when establishing a group. This is particularly useful in larger networks where multiple HSRP configurations need to be managed across different routers and interfaces to provide redundancy. Being able to use a number from 0 to 255 allows for organizing and structuring HSRP groups efficiently according to network design.

The understanding of group number limitations and their implications is crucial for network design and redundancy planning, as the selection of group numbers can determine how routers communicate and respond during failover events.