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300-320 · Question #281

Which protocol should be configured if a network administrator has the following requirements? - Multiple physical gateways participating simultaneously in packet forwarding. - All hosts in the VLAN…

The correct answer is D. GLBP. GLBP (Gateway Load Balancing Protocol) is the only First Hop Redundancy Protocol (FHRP) among the options that allows multiple physical routers to actively forward traffic simultaneously. It uses a single virtual IP address (configured as the hosts' default gateway) but assigns…

Advanced Enterprise Campus Networks

Question

Which protocol should be configured if a network administrator has the following requirements?

  • Multiple physical gateways participating simultaneously in packet

forwarding.

  • All hosts in the VLAN configured with the same default gateway

address.

Options

  • AHSRP
  • BVRRP
  • CVTP
  • DGLBP

How the community answered

(50 responses)
  • A
    12% (6)
  • B
    4% (2)
  • C
    6% (3)
  • D
    78% (39)

Explanation

GLBP (Gateway Load Balancing Protocol) is the only First Hop Redundancy Protocol (FHRP) among the options that allows multiple physical routers to actively forward traffic simultaneously. It uses a single virtual IP address (configured as the hosts' default gateway) but assigns different virtual MAC addresses to each Active Virtual Forwarder (AVF), load-balancing traffic across all gateways. HSRP (A) and VRRP (B) only allow one active gateway at a time - the others are standby and do not forward. VTP (C) is a VLAN management protocol unrelated to gateway redundancy. GLBP satisfies both requirements: simultaneous multi-gateway forwarding and a single shared virtual IP for all hosts.

Topics

#GLBP#first-hop redundancy#load balancing#default gateway

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