What allows a server to know which router to send requested information to?

The correct choice is the IP address because the IP address is a key part of how data is routed on a network. When a server needs to send data to a client, it determines the destination by using the destination IP address. This address uniquely identifies devices on a network or the internet, ensuring that data packets are sent to the correct location.

Each router in a network uses routing tables, which help in determining the best path for the data to reach its destination based on its IP address. The router examines the destination IP address in the packet and forwards it appropriately if it is within its local network or sends it to the next hop in the process if it requires traversal through multiple networks.

In contrast, the router's MAC address is pertinent for data link layer operations within a local network segment rather than for wide-area routing decisions. The network name provides identification for network access but does not directly establish data routing paths. Signal strength relates to the quality of the connection rather than the addressing needed to route information. Thus, the IP address is essential for enabling a server to accurately determine where to send requested information across networks.