Idiots' Guides to Networking
From aa-asterisk.org.uk wiki
These "Idiots' Guides" (a concept originally coined by BUTT) are written to explain networking concepts in language we can all understand.
The originals are supplied as OpenOffice.org 2.4.1 Impress presentations. Alternate formats are also listed but they are not guaranteed to work or display properly in the case of the PPTs.
Non-idiots are of course equally welcome to view them and make use of them :-)
If you don't have OpenOffice, you can download a free copy from the OpenOffice.org web site.