Routing Network Protocols

Routed protocols are transported by routing protocols across an internetwork. In general, routed protocols in this context also are referred to as network protocols. These network protocols perform a variety of functions required for communication between user applications in source and destination devices and these functions can differ widely among protocol suites. Network protocols occur at the upper five layers of the OSI reference model: the network layer, the transport layer, the session layer, the presentation layer and the application layer.

Routed protocols are protocols that are routed over an internetwork. Examples of such protocols are the Internet Protocols (IP), DECnet, AppleTalk, Novell NetWare, OSI, Banyan VINES and Xerox Network System (XNS). Routing protocols, on the other hand, are protocols that implement routing algorithms. Routing protocols are used by intermediate systems to build tables used in determining path selection of routed protocols. Examples of these protocols include Interior Gateway Routing Protocol (IGRP), Enhanced Interior Gateway Routing Protocol (Enhanced IGRP), Open Shortest Path First (OSPF), Exterior Gateway Protocol (EGP), Border Gateway Protocol (BGP), Intermediate System-Intermediate System (IS-IS) and Routing Information Protocol (RIP).