Which First Hop Redundancy Protocol maximizes uplink utilization while minimizing configuration?

GLBP (Gateway Load Balancing Protocol) is the correct answer because it uniquely provides load balancing across multiple routers for a single virtual IP address, maximizing uplink utilization. It achieves this by assigning different virtual MAC addresses to different hosts, directing them to different active forwarders. HSRP (Hot Standby Router Protocol) and VRRP (Virtual Router Redundancy Protocol) operate on an active/standby model, meaning only one router actively forwards traffic for a given virtual IP at any time, leaving other uplinks underutilized. While HSRP v2 offers some enhancements over v1 (like IPv6 support and a larger group range), neither version inherently provides load balancing in the same way GLBP does.