Which protocol is referred to as 'GLBP'?

The protocol referred to as 'GLBP' is the Gateway Load Balancing Protocol. This is a Cisco proprietary protocol designed to allow load balancing and redundancy across multiple default gateways in a network.

GLBP works by enabling multiple routers or gateways to share the same virtual IP address, which is crucial in environments where high availability is necessary. Instead of relying on a single primary gateway, GLBP allows multiple gateways to be active simultaneously, distributing traffic among them based on a load-balancing algorithm. This helps in optimizing resource usage and reduces the risk of network failure due to a single point of failure.

In contrast to other options, the terms "Global," "Generic," and "Group" do not accurately represent the function or designation of the protocol, as GLBP specifically refers to the Gateway Load Balancing Protocol's role in managing and balancing gateway traffic effectively.