Gateway-to-Gateway Protocol
| Internet protocol suite |
|---|
| Application layer |
| Transport layer |
| Internet layer |
| Link layer |
The Gateway-to-Gateway Protocol (GGP) is an obsolete protocol defined for routing datagrams between gateways. It belongs in the Transport Layer of the TCP/IP model.[1]
Gateway-to-Gateway Protocol (GGP) was designed to travel in IP datagrams similar to UDP or TCP segments. Each GGP message has a field header that identifies the message type and the format of the remaining fields. Because only core routers participated in GGP, and because core routers were controlled by a central authority, other routers could not interfere with the exchange.
GGP measures distance in router hops, where a router is defined to be zero hops from directly connected networks, one hop from networks that are reachable through one other router. The number of hops along a path from a given source to a given destination refers to the number of routers that a datagram encounters along that path.
References
- ^ Comer, Douglas E. (2000). Internetworking with TCP/IP (4 ed.). Prentice Hall: Upper Saddle River, NJ.
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