How The Internet Works
Steve Gibson put together some high level podcasts and transcripts on how the Internet works. It is decent information for anyone trying to grasp the concept of what happens when you open your web browser and navigate to a web site. Here are some links to the podcasts and transcripts.
How the Internet Works, Part 1 - http://www.grc.com/sn/sn-309.pdf
How the Internet Works: ICMP & UDP - http://www.grc.com/sn/sn-313.pdf
TCP Part 1 - Getting Connected - http://www.grc.com/sn/sn-317.pdf
TCP Part 2 - Attacking TCP - http://www.grc.com/sn/sn-323.pdf
TCP Part 3 - Necessary Refinements - http://www.grc.com/sn/sn-325.pdf
Buffer Bloat - http://www.grc.com/sn/sn-345.pdf
CODLing Our Buffers - http://www.grc.com/sn/sn-359.pdf