Question: If routing information is automatically updated by routers when changes are made to the network configuration are called

Answer:

When routing information is automatically updated by routers when changes are made to the network configuration, it is commonly referred to as "dynamic routing." Dynamic routing protocols are designed to automatically exchange routing information among routers, allowing them to adapt to changes in the network topology and update their routing tables accordingly.

Dynamic routing protocols employ various algorithms and mechanisms to exchange information about network reachability, link states, and metrics. When a change occurs, such as the addition or removal of a network link or a change in link status, routers using dynamic routing protocols share this information with their neighboring routers. Through this process of exchanging routing updates, routers can dynamically update their routing tables to reflect the current network topology and choose the best paths for forwarding packets.

Some popular dynamic routing protocols include OSPF (Open Shortest Path First), RIP (Routing Information Protocol), EIGRP (Enhanced Interior Gateway Routing Protocol), and BGP (Border Gateway Protocol). Each protocol has its own characteristics, such as the way they calculate routes, handle metric calculations, and distribute routing updates.

In contrast, "static routing" refers to manually configuring routing information on routers, where network administrators manually define the routes and specify the next hop for each destination network. Static routing does not involve automatic updates based on network changes and requires manual intervention to modify the routing configuration when network changes occur.

Dynamic routing offers advantages such as scalability, adaptability to network changes, and load balancing capabilities. However, it also introduces additional overhead and complexity compared to static routing. The choice between dynamic and static routing depends on the specific requirements and characteristics of the network.