Which two protocols are used for high availability in enterprise networks? (Choose two.)

BGP (Border Gateway Protocol) is a path-vector routing protocol for inter-AS routing and does not provide first-hop gateway redundancy for hosts in an enterprise LAN.

GLBP (Gateway Load Balancing Protocol) is a Cisco-proprietary first-hop redundancy protocol that provides both gateway failover and active load balancing across multiple routers, improving both availability and bandwidth utilization for enterprise networks.

RSTP (Rapid Spanning Tree Protocol) is a Layer 2 loop-prevention protocol that provides redundant switch paths, not Layer 3 gateway high availability.

VRRP (Virtual Router Redundancy Protocol) is an IETF-standard first-hop redundancy protocol (RFC 5798) that provides automatic gateway failover by electing a master virtual router, ensuring hosts always have a reachable default gateway.

OSPF (Open Shortest Path First) is a link-state Interior Gateway Protocol for IP routing and does not provide the virtual gateway IP mechanism required for first-hop redundancy.