It goes without saying that most of us already appreciate the wealth of information available from the World Wide Web. From homes to small businesses to schools to large corporations, the Internet enables commerce and communication, but the Internet also opens a host of security threats and harmful contents—such as pornography, gambling, and violence—contents that parents may find unsuitable for viewing by minors.

One solution to address the dangers of the Web is to implement content filtering to prevent computer users from viewing inappropriate web sites or content. Content filtering can be achieved in various different ways. It may be implemented via software on individual computers or at a central point on the network such as the proxy server or internet router. Read more