Final answer:
A router is needed to share an Internet connection with multiple computers.
Step-by-step explanation:
If you want to share your Internet connection with more than one computer, you will need a(n) router.
A router is a device that connects multiple devices to a single Internet connection. It acts as a central hub and allows multiple devices to access the Internet simultaneously. A router creates a local area network (LAN) and assigns unique IP addresses to each connected device.
For example, if you have a router at home, you can connect your computer, smartphone, and tablet to it and all three devices can access the Internet at the same time.