What is a disadvantage of dynamic routing?

Dynamic routing involves protocols that automatically adjust to changes in the network, such as adding or removing routes based on current conditions. While this feature provides adaptability and ease of management in complex networks, it also has the downside of consuming more bandwidth compared to static routing, where routes are manually set and do not change unless explicitly configured.

Dynamic routing protocols generate periodic routing updates to communicate information about the network to all participating routers. These updates require bandwidth resources, which can be significant, especially in large networks or under conditions where the network topology changes frequently. Because dynamic routing relies on continuous communication between routers to maintain accurate routing tables, this additional traffic can contribute to congestion and reduced performance on the network.

In contrast, static routing, being a more straightforward configuration, does not generate this overhead, as routes remain constant until manually changed. Thus, the consumption of bandwidth by dynamic routing is a notable disadvantage, particularly in environments where bandwidth is limited or expensive.