Final answer:
A manually set route by the network administrator is a static route, used for precise control over network traffic flow and maintaining consistent network behaviour.
Step-by-step explanation:
A route that is set manually by the network administrator is known as a static route. Unlike dynamic routes that are created by routing protocols, static routes are configured explicitly on routers to send network traffic to a specific destination.
This level of control can be beneficial for managing traffic flow, ensuring security, and optimizing network performance. The static route remains in the routing table until the administrator alters or removes it, which ensures consistent and predictable traffic handling.