Dynamic Routing performs the same function as static routing except it is more robust. Static routing allows routing tables in specific routers to be set up in a static manner so network routes for packets are set. If a router on the route goes down the destination may become unreachable. Dynamic routing allows routing tables in routers to change as the possible routes change. There are several protocols used to support dynamic routing. Routing Information Protocol (RIP): It helps routers dynamically adapt to changes of network connections by communicating information about which networks each router can reach and how far away those networks are. Open Shortest Path First (OSPF): It fixes many of the issues with RIP and allows routes to be selected dynamically based on the current state of the network, not just a static picture of how routers are connected. It also includes numerous advanced features, including support for a hierarchical topology (or a tree network) and automatic load sharing amongst routes.
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