In GLBP, which router will respond to client ARP requests?

In GLBP, which router will respond to client ARP requests?
A . The active virtual gateway will reply with one of four possible virtual MAC addresses.
B . All GLBP member routers will reply in round-robin fashion.
C . The active virtual gateway will reply with its own hardware MAC address.
D . The GLBP member routers will reply with one of four possible burned in hardware addresses.

Answer: A

Explanation:

GLBP Virtual MAC Address Assignment

A GLBP group allows up to four virtual MAC addresses per group. The AVG is responsible for assigning the virtual MAC addresses to each member of the group. Other group members request a virtual MAC address after they discover the AVG through hello messages. Gateways are assigned the next MAC address in sequence. A virtual forwarder that is assigned a virtual MAC address by the AVG is known as a primary virtual forwarder. Other members of the GLBP group learn the virtual MAC addresses from hello messages. A virtual forwarder that has learned the virtual MAC address is referred to as a secondary virtual forwarder.

Reference: http://www.cisco.com/en/US/docs/ios/12_2t/12_2t15/feature/guide/ft_glbp.html

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