What technique allows routers to exchange routing information automatically?

Dynamic routing is the technique that allows routers to exchange routing information automatically. This method utilizes protocols that enable routers to send and receive information about network conditions, which helps them update their routing tables automatically. Protocols such as Routing Information Protocol (RIP), Open Shortest Path First (OSPF), and Border Gateway Protocol (BGP) facilitate this process, adapting to changes in the network topology in real-time.

As routers communicate this information with one another, they can adjust to network failures or changes in traffic patterns, ensuring efficient data flow. This adaptability is crucial for maintaining optimal performance and reliability across large and complex networks.

In contrast, static routing requires manual configuration of routes on each router, making it less adaptable and more prone to human error. Manual routing, while similar in nature to static routing, emphasizes direct human intervention for changes. Process routing is not a standard term used in networking and does not refer to a recognized technique for routing information exchange.