What does GLBP utilize to evenly distribute traffic among routers?

GLBP, or Gateway Load Balancing Protocol, employs a technique that helps evenly distribute traffic across multiple routers serving as gateways. The correct approach utilized by GLBP is indeed referred to as a round robin method. This method allows GLBP to designate a virtual IP address shared among the group of routers, with each router able to respond to ARP requests for that virtual IP.

When a client sends an ARP request, GLBP responds with the IP address of the next router in the predefined order, effectively distributing outgoing traffic to those routers in a rotating manner. This helps in balancing the load across the routers while also providing redundancy.

The other options might represent different load balancing mechanisms or methods but do not accurately describe the specific technique that GLBP uses for traffic distribution. For instance, active load balancing can imply different techniques that involve monitoring the load on routers, while static path distribution does not dynamically adjust based on current loads and is not characteristic of how GLBP functions. Random routing does not provide reliable load balancing as it lacks a structured approach to distributing traffic. Therefore, round robin is the distinct method that DLBP employs for achieving its load balancing goals.