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Most routers have one WAN port, but you'll need as many LAN ports as you have wired devices. If you have more wired devices than can fit on a router, you can plug them all in using a wired switch. A switch is like a power strip for your router: it lets you plug in more devices than the router originally allowed.our router is the glue that holds your home network together. It connects all your computers to one another, either through Ethernet cables or a wireless connection. A router is different than a modem: your modem connects you to the internet, while your router connects your computers to one another.
Here's how it works: Every device on the Internet needs a unique IP address. Your ISP provides you with one, allowing one device to access the Internet. A router will access the Internet through that IP address, then provide local IP addresses--not visible on the Internet--for the PCs and other devices connected to it.This allows you to access the Internet from multiple computers through one connection.ecause your computer's local IP address isn't visible to the Internet, it's not visible to criminals, either, giving you another layer of defense. A typical router. has four or five ethernet ports, one of which is dedicated for connecting to the modem. You can plug computers or other devices into the others.