HSRP
Hot Standby Routing Protocol. Allows two or more routers to act as default gateways on a network
VRRP
active/standby redundancy approach
HSRP virtual mac addr
0000.0C9F.F000
GLBP
Gateway Load Balancing Protocol. Uses an active/active redundancy approach.
What happens if HSRP router discovers no others in a subnet?
It will be the active router
What happens if a HSRP router is configured with “no standby preempt”?
It will be in standby mode even if it has a higher priority