Final answer:
Routers, printers, and servers are the three devices that will need IP addresses on a network.
Step-by-step explanation:
The three devices that will need IP addresses are routers, printers, and servers.
Routers are essential for connecting different networks together, and each router requires its own IP address to function properly.
Printers need IP addresses so that they can receive print jobs from various devices on the network.
Servers are responsible for storing and managing data, and they also require IP addresses to communicate with other devices on the network.