2.3.1 Apache

Apache is not the only web server, and it may not be the fastest. However, it may be the most commonly used free HTTP server out there. As a result, it is more debugged and probably more secure than the other ones. Besides, you can find tons of books on Apache.

Two main versions of Apache are currently in use. Version 1.3 is their ``old'' version, while version 2 is their current version. For this class, it is okay to stay with version 1.3, since none of the features that are unique in version 2.0 is necessary.