Traffic control program for networks, used by routers, developed by Cisco in the early 1980's. Determines the best path through an internet by looking at the delay and bandwidth of the networks between routers.

Learns best routes through LAN Internet (TCP/IP).

A distance vector IP routing protocol developed by Cisco Systems, Inc.

See IGRP in the "Cisco Systems Terms and Acronyms" section.

Interior Gateway Routing Protocol (IGRP) is a kind of IGP which is a distance-vector routing protocol invented by Cisco, used by routers to exchange routing data within an autonomous system.