BGP is a successor to which protocol?

• A. RIP
• B. OSPF
• C. EGP
• D. EIGRP

Answer: (C)

BGP is the successor to EGP, moving inter-domain routing from the early Internet into a scalable, policy-driven system. Exterior Gateway Protocol was the first protocol used to exchange routing information between autonomous systems, but it couldn’t scale with the Internet’s growth, lacked flexible policy control, and didn’t support CIDR. BGP was designed to overcome these limitations by introducing richer path information (such as the AS path), policy-based routing, and classless routing, enabling reliable, scalable exchange of routes across many networks. The other options are interior gateway protocols or different families used inside a single autonomous system, not replacements for EGP in inter-domain routing.