HSRP vs VRRP vs GLBP

Cisco Hot-Standby Router Protocol (HSRP):

Created by Cisco, for Cisco in 1994
Uses a default hello timer of 3 seconds with a hold timer of 10 seconds
u need unique IP add. as a virtual gateway ip.
active router
standby router

Virtual Router Redundancy Protocol (VRRP)

Created by the IETF in 1999
Works between multiple vendors
Has faster timers than HSRP by default - hello of 1 second, hold timer of 3 seconds
u haven't any need of unique IP add u can use any assigned physical ip as a virtual gateway.
master router
backup router

Gateway Load Balancing Protocol (GLBP)

Created by Cisco, for Cisco in 2005
Identical features to HSRP, but allows an active-active connection that adds load-balancing features
One AVG(active virtual gateway)
Many AVF(active virtual forwarders)