Speed test:

http://bandwidthplace.com/speedtest/

Drivers:

http://www.windrivers.com/company.htm

http://www.driverzone.com

http://www.driverguide.com

Security:

http://www.checkpoint.com

http://www.sofaware.com

http://www.sofaware.com/html/safeatoffice.pdf

http://www.celestix.com/support/index.htm

http://www.iana.org/assignments/port-numbers

http://www.symantec.com/sabu/nis/npf/

VPN-FAQ:

http://www.corecom.com/external/vpn/vpnfaq.htm

http://www.winnetmag.com/Articles/Index.cfm?ArticleID=8290

Virus Check:

http://security.symantec.com

http://housecall.trendmicro.com

http://www.mcafee.com

http://www.norton.com

Microsoft:

http://support.microsoft.com

http://www.microsoft.com/technet/

Networking Communications:

http://www.avaya.com

http://www.cisco.com

http://www.nortelnetworks.com/index.html

Storage:

http://www.ca.com

http://support.veritas.com/menu_ddProduct_BEWNT.htm