What role does the AVG play in GLBP?

The Active Virtual Gateway (AVG) plays a critical role in Gateway Load Balancing Protocol (GLBP) by serving as the primary virtual router that manages the other members of a virtual router group. In a GLBP setup, multiple routers can work together to present the appearance of a single virtual router to the clients. The AVG is responsible for assigning virtual IP addresses to participating routers and managing the load balancing of outbound traffic among the multiple gateways.

When a host sends traffic to the virtual IP address assigned to the GLBP group, it interacts with the AVG, which then determines which of the available active virtual gateways (AVGs) should respond to the ARP requests from the host. This allows GLBP to distribute the traffic load among the routers effectively, providing redundancy and enhancing the availability of gateway services.

In contrast, the other options do not correctly describe the AVG's function within GLBP. The Active Virtual Group does not exist in the context of GLBP, nor do Active Virtual Guard or Advanced Virtual Gateway accurately reflect the responsibilities or terminology associated with GLBP. The primary role of the AVG is essential for managing and facilitating load sharing and fault tolerance in Gateway Load Balancing Protocol.