My Network Card Won't Connect
Another common problem is when your network card won't connect and you've got an IP address that starts with 169.254. This can happen with either a regular network card or a wireless card, but is more common with a wireless card. The IP address that starts with 169.254 indicates that you didn't receive an IP address from a Dynamic Host Configuration Protocol (DHCP) server for some reason, probably because there is a connectivity issue. If this is a wired connection, start by checking that the status lights on the back of the network card are the proper color. See your network card documentation for what the different colours mean. If they aren't the right color, there are at least five possibilities:
? The cable is bad.
? The cable is not firmly connected at both ends.
? The port on the hub or router is bad. Try plugging the network cable into a different port on the hub or router.
? The network card is bad.
? The cable is the wrong kind of network cable.
Let's examine that last possibility. You should always use CAT5, CAT5+ or CAT6 network cable. Not phone cable or other kinds of cable that may look the same. Second, there are both "straight-through" and "cross-over" cables. If you're connecting to a hub, switch, or gateway, then you need a straight-through cable. If you're connecting directly from the network card on one computer to the network card on another, you need a cross-over cable. For more information about cables, see Understanding Ethernet Cabling.