IGRP

IGRP is a routing protocol developed by Cisco Systems in the 1980s. IGRP is a distance vector routing protocol, meaning that it uses the Bellman-Ford algorithm to calculate the best path to a destination. IGRP uses a composite metric, which takes into account factors such as bandwidth, delay, load, and reliability. IGRP is not a widely used protocol, as it has been replaced by newer protocols such as EIGRP and OSPF.