Which protocol is used by both internet service providers (ISPs) and network service providers (NSPs)?

Border Gateway Protocol (BGP) is a protocol that enables ISPs and NSPs to exchange routing

information among themselves. BGP is used to determine the best path for sending data packets

across the Internet. BGP is also known as the protocol of the Internet backbone, as it connects

different autonomous systems (ASes) that form the Internet. BGP is not used by end systems or local

networks, but only by routers that operate at the border of ASes. BGP is a complex and dynamic

protocol that can handle changes in network topology, traffic load, and policy requirements. BGP is

also a scalable protocol that can support the growth of the Internet1234 Reference:

1: Internet service provider - Wikipedia

2: 1.8: Internet Backbones, NAPs, and ISPs - cs.huji.ac.il

3: Lecture Notes – Unit 2 How does the Internet work?

4: Border Gateway Protocol - Wikipedia