Dynamic routing is a networking technique where routers exchange information about network topology and dynamically adjust their routing tables to adapt to changes in the network. Unlike static routing, which requires manual configuration of routes, dynamic routing protocols automate the process. Common dynamic routing protocols include OSPF (Open Shortest Path First), RIP (Routing Information Protocol), and BGP (Border Gateway Protocol). When a change occurs, such as a link failure or the addition of a new network, routers using dynamic routing protocols share this information with each other, allowing for the automatic calculation of optimal paths for data transmission. Dynamic routing enhances network scalability and flexibility, making it well-suited for large and dynamic environments where network conditions may change frequently.