300-320 · Question #12
Which protocol is best when there are circuit connections with two different ISPs in a multihoming scenario?
The correct answer is B. BGP. BGP (Border Gateway Protocol) is the standard exterior gateway protocol and the only protocol designed for inter-AS (Autonomous System) routing on the internet. In a multihoming scenario-where an organization connects to two or more ISPs-BGP allows granular control over inbound…
Question
Which protocol is best when there are circuit connections with two different ISPs in a multihoming scenario?
Options
- AVRRP
- BBGP
- CIPsec
- DSSL
How the community answered
(46 responses)- A2% (1)
- B87% (40)
- C4% (2)
- D7% (3)
Explanation
BGP (Border Gateway Protocol) is the standard exterior gateway protocol and the only protocol designed for inter-AS (Autonomous System) routing on the internet. In a multihoming scenario-where an organization connects to two or more ISPs-BGP allows granular control over inbound and outbound traffic paths, supports policy-based routing, and enables the organization to advertise its own IP prefixes to both ISPs. VRRP (A) is a first-hop redundancy protocol for default gateways, not WAN routing. IPsec (C) is a VPN encryption framework. SSL (D) is a transport-layer security protocol. None of these handle inter-ISP routing decisions.
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