What means bae in english5/7/2023 Like the OSPF protocol, IS-IS uses Dijkstra's algorithm for computing the best path through the network. Each IS-IS router independently builds a database of the network's topology, aggregating the flooded network information. IS-IS is a link-state routing protocol, operating by reliably flooding link state information throughout a network of routers. This is in contrast to exterior gateway protocols, primarily Border Gateway Protocol (BGP), which is used for routing between autonomous systems (RFC 1930). IS-IS is an interior gateway protocol, designed for use within an administrative domain or network. IS-IS has been called "the de facto standard for large service provider network backbones." Description The Internet Engineering Task Force (IETF) republished IS-IS in RFC 1142, but that RFC was later marked as historic by RFC 7142 because it republished a draft rather than a final version of the (International Organization for Standardization) ISO standard, causing confusion. The IS-IS protocol is defined in ISO/IEC 10589:2002 as an international standard within the Open Systems Interconnection (OSI) reference design. It accomplishes this by determining the best route for data through a packet switching network. Intermediate System to Intermediate System ( IS-IS, also written ISIS) is a routing protocol designed to move information efficiently within a computer network, a group of physically connected computers or similar devices.
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