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…
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)- A12% (6)
- B4% (2)
- C6% (3)
- D78% (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.
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