What Is Isis Routing Protocol?
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ISIS (Intermediate System to Intermediate System) is an Interior Gateway Protocol (IGP) routing protocol used in large corporate networks and public and private backbones. It is based on the OSI link state routing protocol and is used for routing IP datagrams across a network. ISIS uses the shortest path first (SPF) algorithm to calculate the best path for data to travel across a network and is designed to be scalable and support large networks. ISIS is designed to work with the Dynamic Host Configuration Protocol (DHCP) and the Resource Reservation Protocol (RSVP) to improve the performance of the network.