* Direct Route (C): This has the highest priority because it represents networks directly connected to a router's interfaces.
* Static Route (B): These are manually configured but have lower priority than direct routes.
* OSPF Route (D): OSPF dynamically learns routes and assigns them based on cost, but it has lower priority than direct and static routes.
* RIP Route (A): RIP has the lowest priority due to its high administrative distance (120).
Priority order (from highest to lowest):Direct Route > Static Route > OSPF Route > RIP Route.
Thus, the correct answer is C (Direct Route).

Comprehensive Explanation: The Transport layer (Layer 4) in the OSI model is responsible for end-to-end error checking, flow control, and reliable data transmission. It ensures that data is properly sequenced, without errors, and flow-controlled between the sender and receiver. Protocols such as TCP (Transmission Control Protocol) operate at this layer, providing mechanisms for retransmitting lost packets and maintaining the reliability of a session

Detailed Explanation:In NAPT, port numbers are dynamically assigned as traffic flows through the router.
The port number range is automatically selected, and manual configuration of each mapping is not required.
NAPT dynamically uses different ports for mapping private IP addresses to a single public IP address.