What do dynamic routes depend on for their functionality?

Dynamic routes rely on routing protocols to exchange routing information among different routers within a network. These protocols automatically update the routing tables based on current network conditions, which is essential for adapting to changes such as network failures or newly added nodes. This process ensures that routers can dynamically find the best paths for data packets, maintaining optimal performance without requiring manual configuration changes.

In contrast, the other options focus on static approaches, such as manual input or fixed configurations, which do not provide the level of adaptability and efficiency that dynamic routing protocols offer. Therefore, the reliance on regular updates from routing protocols is what truly enables the functionality of dynamic routes.