Which statement about preemption in HSRP and VRRP is correct?

Which statement about preemption in HSRP and VRRP is correct?

• A. Both HSRP and VRRP support preemption.
• B. Only HSRP supports preemption.
• C. Only VRRP supports preemption.
• D. Neither supports preemption.

Answer: (A)

Preemption lets the router with the higher priority reclaim the active role as soon as it becomes reachable again. In both HSRP and VRRP, the active (master) router is determined by configured priority values. When preemption is enabled, a higher-priority device that comes back online will take over as the master, ensuring the gateway always uses the best available router. If preemption is disabled, the current master stays in place even if a higher-priority device appears, which can lead to a slower or less optimal convergence. Because both protocols provide this preemption capability, the statement that both support preemption is correct.

Preemption lets the router with the higher priority reclaim the active role as soon as it becomes reachable again. In both HSRP and VRRP, the active (master) router is determined by configured priority values. When preemption is enabled, a higher-priority device that comes back online will take over as the master, ensuring the gateway always uses the best available router. If preemption is disabled, the current master stays in place even if a higher-priority device appears, which can lead to a slower or less optimal convergence. Because both protocols provide this preemption capability, the statement that both support preemption is correct.