Which protocol advertises a virtual IP address to facilitate transparent failover of a Cisco routing device?

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Which protocol advertises a virtual IP address to facilitate transparent failover of a Cisco routing device?

FHRP
DHCP
RSMLT
ESRP

Explanation: First Hop Redundancy Protocol (FHRP) is a protocol that enables two or more devices to work together in a group, sharing a single IP address, the virtual IP address. One router is elected to handle all requests sent to the virtual IP address. With HSRP, this is the active router. An HSRP group has one active router and at least one standby router.

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