IGP (Internet Gateway Protocol)

An Interior Gateway Protocol (IGP) is a set of rules used by routers within a single network or organization to exchange information about the best paths for data to travel. It helps routers communicate to ensure data packets reach their destination efficiently, without getting lost or delayed. IGPs manage routing within an individual network, like a company's office network or an internet service provider's infrastructure, allowing all devices to work together seamlessly. Common examples include OSPF and EIGRP. They are essential for maintaining proper, dynamic routing inside a network.