BGP between autonomous systems is achieved by which type of BGP?

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Multiple Choice

BGP between autonomous systems is achieved by which type of BGP?

Explanation:
Inter-domain routing uses eBGP. This is the BGP session type that runs between routers in different autonomous systems, which is exactly what happens when routing information travels across administrative boundaries. In contrast, iBGP runs inside the same AS, so it wouldn’t apply for inter-AS exchanges. MP-BGP is a multi-protocol extension used for carrying additional address families (like VPNs or multicast), not the fundamental distinction between inter- and intra-AS routing. The general term “BGP” doesn’t specify the AS relationship. So, when two autonomous systems exchange routes, they use external BGP—eBGP.

Inter-domain routing uses eBGP. This is the BGP session type that runs between routers in different autonomous systems, which is exactly what happens when routing information travels across administrative boundaries. In contrast, iBGP runs inside the same AS, so it wouldn’t apply for inter-AS exchanges. MP-BGP is a multi-protocol extension used for carrying additional address families (like VPNs or multicast), not the fundamental distinction between inter- and intra-AS routing. The general term “BGP” doesn’t specify the AS relationship. So, when two autonomous systems exchange routes, they use external BGP—eBGP.

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