Some laptop computers don't come with network equipment. If that's the case with yours, you will need to buy a USB network adapter. These devices come in two types, allowing you an Ethernet or a wifi connection. USB network adapters are powered through your USB port, so you can use them on the go. Some wifi adapters are so small, you'll hardly notice them when their plugged in. But if you need to connect to a weak signal you can buy one with a large antenna. Cheap USB network adapters are available at wholesale prices. Many distributors have free shipping offers so you can get your device quickly and cheaply.