USB stands for Universal Serial Bus... If you meant to ask if you can use your USB port to somehow connect to the internet, then yes. You can get a USB wireless (Wifi) adapter if you have a wireless...
Yes, it is possible to connect via USB. You must have a cord with a mini-USB on one end a USB2.0 on the other to connect to the internet via cable modem.
To connect to the internet you need to first buy an internet connection. You must then plug your internet cable into a router. Finally you must have connection to the router from your PC, most...