http://www.adslguide.org.uk

http://www.adslguide.org.uk
Your Guide to BoardBan Internet

http://www.c4arab.com/

http://www.c4arab.com/
الموسوعة العربية للكمبيوتر و الانترنت

webopedia

webopedia
The only online dictionary and search engine you need for computer and Internet technology definitions.

http://www.webopedia.com/

IP2Location

Web Query to Reverse Lookup Country, State, City, Latitude, Longitude and ISP by IP address

http://www.ip2location.com/
http://www.ip2location.com/free.asp

Regarding the DSL and NetWorking

www.dslreports.com
www.homenethelp.com/
http://portforward.com/
http://www.faqs.org/faqs/internet/tcp-ip/tcp-ip-faq/part1/
http://www.faqs.org/faqs/internet/tcp-ip/tcp-ip-faq/part1/