What is a major advantage of dynamic routing protocols over static routes?

• A. Dynamic routing protocols determine a new best path if the initial path becomes unusable
• B. They require no CPU cycles
• C. They never exchange routing information with neighbors
• D. They are always less secure

Answer: (A)

Dynamic routing’s main advantage is its ability to automatically find a new best path when the current path becomes unusable. These protocols continuously learn the network layout and share route information with neighboring routers, so if a link or device on the current route fails, they quickly recompute and switch to an alternate path. This automatic failover and adaptive path selection makes the network more resilient and reduces the need for manual intervention, unlike static routes which stay fixed until an administrator changes them. The other statements aren’t accurate: dynamic routing requires CPU cycles to process topology changes, they do exchange routing information with neighbors, and security is not inherently worse—it's determined by how the protocol is configured and protected.