here are some useful sites for begginers:
*English sites
http://www.learnthenet.com/english/index.html
http://whatis.techtarget.com/
http://www.zdnet.com/anchordesk/story/story_2575.html

*Arabic sites
http://www.c4arab.com/
http://www.arabcomputing.com/
http://ironprivate.tripod.com/internet.htm