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Which of the following FHRP options uses an active/active model per subnet?
OER
GLBP
HSRP
VRRP
GLBP (Gateway Load Balancing Protocol) allows two (or more) routers to share the responsibility of being the default gateway for hosts on a subnet. GLBP works on a model called active/active because all GLBP routers actively forward traffic for some hosts in the subnet. HSRP (Hot Standby Router Protocol) and VRRP (Virtual Router Redundancy Protocol) do not use an active/active model. OER (Optimized Edge Routing) is not even an FHRP (First Hop Redundancy Protocol).
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