Massachusetts Institute of Technology
Mit: Open Course Ware: Network and Computer Security
This MIT course on network and computer security covers topics such as security in multi-user distributed systems, cryptography, authentication, intrusion detection, and many other security topics.
Other
Pcstats.com: Beginners Guides: Home Networking and File Sharing
This site contains information about establishing and maintaining a secure home computer network, with an emphasis on Windows-based operation systems.
Get Safe Online
Get Safe Online: Use a Firewall
Firewall software forms the first line of defense against hackers and certain types of computer viruses. This site explains what a firewall can do to help secure a computer and what it cannot do. The site also discusses different types...
Wikimedia
Wikipedia: Network Security
This site contains a Wikipedia description of network security.
Get Safe Online
Get Safe Online: Wireless Networks and Hotspots
Wireless networks are more convenient than wired networks, but wireless networks are susceptible to a wider range of security threats. This resource describes some of these security threats and how to configure a secure wireless network.