I want to find a downloadable powerpoint presentation on the basics of
computer networks.

Hi igoon:

The following are all basic networking Powerpoint slideshows that I
was able to find for you to download. [Please keep in mind that much
of this material may be copyrighted - so be careful that you cite it
properly if you are going to re-use it.]


The Basics of Computing
***********************
URL: mis.deborahclark.net/1a/slides/Chapter1b.ppt 
Notes: Slides of particular interest are #7 - #11. Some pretty neat
basic networking graphics.


Computer Networks (CSC 345)
***************************
URL: http://www.cord.edu/faculty/zhang/cs345/classnotes/lecture1.ppt
Notes: Slides of particular interest are #9 - #41. Contains several
slides on Internet-type networks.


Networking Basics
*****************
URL: 198.150.66.131/jconlon/Structures/ Lectures/netbasics.ppt 
Notes: Excellent basic slideshow. Entire document is relevant. 


Data Communications and Computer Networks: A Business User's Approach
*********************************************************************
URL: http://facweb.cs.depaul.edu/cwhite/Book/Slides%20Second%20Ed/SE%20Chapter%201.ppt
     http://facweb.cs.depaul.edu/cwhite/Book/Slides%20Second%20Ed/SE%20Chapter%202.ppt
     http://facweb.cs.depaul.edu/cwhite/Book/Slides%20Second%20Ed/SE%20Chapter%203.ppt
     http://facweb.cs.depaul.edu/cwhite/Book/Slides%20Second%20Ed/SE%20Chapter%204.ppt
     http://facweb.cs.depaul.edu/cwhite/Book/Slides%20Second%20Ed/SE%20Chapter%207.ppt
     http://facweb.cs.depaul.edu/cwhite/Book/Slides%20Second%20Ed/SE%20Chapter%2010.ppt
     http://facweb.cs.depaul.edu/cwhite/Book/Slides%20Second%20Ed/SE%20Chapter%2011.ppt
Notes: Some excellent chapters from a larger book. Lots of good
material here.


Basics of Networking
********************
URL: http://mpr.cs.siue.edu/bmw/CS447/Intro.ppt
Notes: Some really neat interactive slides. Some later material may be
more in-depth than you want.


Network Basics
**************
URL: http://www.schools.ash.org.au/mcpcompdept/ppts/Network%20Basics.ppt
Notes: Brief, but excellent overview.


I hope this helps. If you need any clarification of what I've
provided, please ask using the Clarification feature - before you rate
this answer.

Thanks. 

websearcher-ga


Search Strategy:

basics network OR networks filetype:ppt
://www.google.com/search?q=basics+network+OR+networks+filetype:ppt&hl=en&lr=&ie=UTF-8&safe=off&as_qdr=all&start=20&sa=N

"computer networks" basics filetype:ppt
://www.google.com/search?hl=en&lr=&ie=ISO-8859-1&safe=off&as_qdr=all&q=%22computer+networks%22+basics+filetype%3Appt

(Please note that the "filetype:ppt" in the search strings allows you
to return only Powerpoint documents.)