Company uses GLBP to provide for router redundancy in the network. Which describes the
default load balancing scheme used by the Gateway Load Balancing Protocol (GLBP)?
A.
Per host basis using a strict priority scheme
B.
Per session using a round-robin scheme
C.
Per session using a strict priority scheme
D.
Per GLBP group using a strict priority scheme
E.
Per host basis using a round-robin scheme
F.
Per GLBP group using a round-robin scheme
Explanation:
To provide a virtual router, multiple switches (routers) are assigned to a common GLBP
group. Rather than having just one active router performing forwarding for the virtual router
address, all routers in the group can participate and offer load balancing by forwarding a
portion of the overall traffic. The advantage is that none of the clients have to be pointed
toward a specific gateway address—they can all have the same default gateway set to the
virtual router IP address. The load balancing is provided completely through the use of
virtual router MAC addresses in ARP replies returned to the clients. As a client sends an
ARP request looking for the virtual router address, GLBP sends back an ARP reply with the
virtual MAC address of a selected router in the group. The result is that all clients use the
same gateway address but have differing MAC addresses for it.