Routing protocols are designed to collect data on network topologies. The main task of routing, or, in other words, the selection of the most optimal route, is usually solved by analyzing special tables that are located in all end network nodes and routers.
In order to automatically build the required tables, the routers change with each other certain information using specially designed service protocols, they are called “routing protocols”. These include the NLSP, RIP, OSPF protocols, which must be distinguished from the network, for example, such as IP.
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Routing protocols are quite diverse, there are a large number of them, and each has its own advantages and disadvantages.