Which protocol pair differentiates in scope: interior gateway for intra-domain routing vs exterior gateway for inter-domain routing?

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Multiple Choice

Which protocol pair differentiates in scope: interior gateway for intra-domain routing vs exterior gateway for inter-domain routing?

Explanation:
This question highlights the scope distinction between interior gateway protocols for routing inside a single domain and exterior gateway protocols for routing between domains. OSPF is an interior gateway protocol used for intra-domain routing within one autonomous system and is known for fast convergence due to its link-state approach. BGP is an exterior gateway protocol used for inter-domain routing between autonomous systems and supports policy-based decisions and path selection across domain boundaries. That pairing—OSPF as interior and BGP as exterior—best reflects the intended scope difference. The other options mix up roles or refer to transport-layer details (OSPF doesn’t use UDP; BGP runs over TCP) and aren’t about the scope distinction.

This question highlights the scope distinction between interior gateway protocols for routing inside a single domain and exterior gateway protocols for routing between domains. OSPF is an interior gateway protocol used for intra-domain routing within one autonomous system and is known for fast convergence due to its link-state approach. BGP is an exterior gateway protocol used for inter-domain routing between autonomous systems and supports policy-based decisions and path selection across domain boundaries. That pairing—OSPF as interior and BGP as exterior—best reflects the intended scope difference. The other options mix up roles or refer to transport-layer details (OSPF doesn’t use UDP; BGP runs over TCP) and aren’t about the scope distinction.

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