A local area network consists of one or more interconnected devices confined to a small area that can transmit data to and from one another. Cable modems can provide Internet access to a single device, but can't establish a LAN without additional equipment. On a modem is a socket called an Ethernet port that is responsible for transmitting packets of data to a network-capable device. You can use a router to split this port into additional ports and create a LAN, allowing multiple devices to connect to the Internet simultaneously. Wired routers, as they're called, are cheaper than wireless routers and are convenient for small businesses that primarily use desktop computers.
Unplug the power adapter from the cable modem. Insert an Ethernet cable into the appropriate jack on the rear of the device.
Insert the other end of the cable into the "Internet" or "WAN" socket on the back of the wired router.
Connect an Ethernet cable to the first available port on the back of the router.
Connect the other end of the cable to the Ethernet socket on the computer, printer or other network-capable device.
Repeat the above steps for each device you want to connect to the network.
Connect the modem and the router to their respective power adapters and then confirm that both adapters are plugged into electrical sockets.
- Cable modem
- Ethernet cables
- You may need to install the router software to a computer before setting up the device.
- Hemera Technologies/AbleStock.com/Getty Images