You can connect a DSL modem to a D-Link router by using an Ethernet cable and then entering your DSL username and password. Most DSL modems have a built-in router ...

Not that I know of, however if you would really like to, you can get the linksys router's with a USB port and uplink them to a wireless access point effectivly making it a Wireless network with a USB ...

Windows comes pre-configured for Internet access via Ethernet. If your computer includes an Ethernet adapter as many do, connecting your computer to the Internet is as simple as connecting a cable.