I develop informational websites and educational material on my own free time. Since I do not operate a business I make the material available for free, even for commercial use.

Some of the material is otherwise typically only available as part of course packages that could cost up to hundreds or even thousands of US dollars.

Please consider making a donation if you find the material useful for personal or commercial use!

I am a network architect who have been working professionally with computer networks since 2004 when I was finishing a computer science degree based on the Cisco Networking Academy Program.

I discovered early on that I enjoy trying to explain complex subjects in a way that most people can understand. One type of explanation rarely works easily on everybody. I found it interesting to find new and different explanations to each topic that I came across.