Tuesday October 19 07:57 pm
What is a firewall? - Webwise - BBC
What do firewalls do, and why is it worth having one? Get an introduction from BBC WebWise, the BBC's beginner's guide to using the internet and computers. For more information about firewalls and internet security in general visit http //www.bbc.co.uk/webwise/guides/about-firewalls where you can find more videos, articles, a weekly column from internet experts and three interactive courses to help you get the most out of the internet.