You will likely need an ethernet network adapter to use your Internet.
You can get either an internal PCI adapter, such as this:
http://www.ssiltd.co.uk/products/net...ard/100207.htm fairly inexpensively.
If you don't care to crack open the case and install a card, you could go with a USB adapter, such as this:
http://www.ssiltd.co.uk/products/net...tor/105290.htm
Note: I'm not in the UK and know NOTHING about this particular retailer. I am merely providing examples from a shop in your country.