Which open-standard FHRP is used to share a virtual IP address among routers?

Which open-standard FHRP is used to share a virtual IP address among routers?

• A. VRRP
• B. HSRP
• C. GLBP
• D. FHRP

Answer: (A)

The concept here is providing a single, stable gateway for hosts even if a router fails. VRRP is the open-standard way to do that. In VRRP, several routers form a group and share one virtual IP address that serves as the default gateway for hosts. One router is elected as the master and actively handles traffic for that virtual IP; the others stay as backups. If the master router goes down, a backup is quickly promoted to master, and the virtual IP stays reachable, so clients don’t have to change their gateway. The virtual IP is tied to a virtual MAC as well, so the switch and hosts continue to use the same gateway address during a failover. VRRP is vendor-neutral and widely implemented, which is why it’s the open standard for sharing a virtual IP among routers. HSRP and GLBP are Cisco-proprietary approaches with similar goals, but they aren’t open standards.

The concept here is providing a single, stable gateway for hosts even if a router fails. VRRP is the open-standard way to do that. In VRRP, several routers form a group and share one virtual IP address that serves as the default gateway for hosts. One router is elected as the master and actively handles traffic for that virtual IP; the others stay as backups. If the master router goes down, a backup is quickly promoted to master, and the virtual IP stays reachable, so clients don’t have to change their gateway. The virtual IP is tied to a virtual MAC as well, so the switch and hosts continue to use the same gateway address during a failover. VRRP is vendor-neutral and widely implemented, which is why it’s the open standard for sharing a virtual IP among routers. HSRP and GLBP are Cisco-proprietary approaches with similar goals, but they aren’t open standards.