Intermediate System-to-Intermediate System. OSI link-state hierarchical routing protocol based on DECnet Phase V routing whereby ISs (routers) exchange routing information based on a single metric to determine network topology. Compare with Integrated IS-IS. See also ES-IS and OSPF.
Intermediate System-to-Intermediate System. An IGP protocol.
Intermediate System-to-Intermediate System. A link-state, interior gateway routing protocol for IP networks that also uses the shortest-path-first (SPF) algorithm to determine routes.
The OSI's emerging IS-IS protocol uses a link state algorithm to provide routing services for TCP/IP and OSI. It determines the best path for TCP/IP and OSI packets through the network, and keeps routers informed of the status of the network and the systems available.
Intermediate system to intermediate system (IS-IS), is a protocol used by network devices (routers) to determine the best way to forward datagrams or packets through a packet-based network, a process called routing.