A+ Core Hardware Practice Exam
Are you ready? Take a 25 Question A+ Core Hardware Practice Exam.

ABCs of Wireless
Great paper on wireless.

BICSI
BICSI is the premier association for the cabling industry. Check out the RCDD certification and Resourse Library. "BICSI is an organization comprised of professionals from the Telecommunications industry. They conduct training for low-voltage cabling distribution design and installation and are non-profit. I find it interesting that they began basically as a series of informal brainstorming sessions between fellow industry pros and blossomed into the organization they are today."

Cisco
The big dog on the porch, Cisco.

Commweb Training
Great site for telecom information

CompTIA A+ Exam Prep Questions
Great Site

DC Circuits
Reviews DC electricity and discusses the fact that DC was used before AC in our homes.

Design Electronics
Great site to learn about basic electronics; Must check out.

DOS Tutorial
Learn all you need to know about DOS in an hour. Make sure you're in MS-DOS, not Windows' DOS.

Dux Computers
Good PC maintenance information.

EIA
Electronics Industry Alliance

Free Online Certification Tests
Great site to see what you know and prepare for a certification exam.

Home Network Resourses
Great site for home networking, incuding voice, video, data, surround and zone sound systems.

Home Network Security
Great site on home network security. Must read!

How Networks Work
Learn how home networking, DSL, cable modems, DNS servers, and many more of the latest technologies work.

How Stuff Works
Great site to learn how computers and networks work

Intel's Ethernet Networking Connectivity
Great site to learn about network connectivity and 10GbE, which is the future.

International Engineering Consortium (IEC)
Premier site regarding telecommunications

IP Network Tutorial
Level 3 Communications' great site on IP networks.

IP Tutorial
Level 3 Communications' great site on IP networks.

LINKSYS
"Here's a link that has some networking and cabling basics."

MCSE Guide
Exam guide to A+ and other certification exams

Motherboards To Go!
Great site for motherboard information.

Network/Cabling Basics
Great site for network/cabling basics

Ohm's Law
Great interactive site using voltage and current to power a light bulb. Which way does current flow? From + to -, or from - to +?

PC Tech Guide
Flat out, this is a great hardware site!

Physics of Optics
The best tutorial to quickly learn the physics behind how light is affected when traveling through a media such as glass.

PracticallyNetworked
"Great site, has hardware reviews, and tutorials for Ethernet, ATM, Tokken Ring. Mostly for SBHO types. But useful none the less."

Principles of Light Refraction - Great interactive site to learn about the refraction of light and how fiber optics works using Snell's Law.

Privateline.com
Great site on the history of telecom

Professor Taylor's OHM Page
Take a walk through the history of science. Great site!

Protocols.com
Great directory on protocols

Resistance
Great interactive site presenting resistance in a circuit.

Samual Morse and the Telegraph
Good telecom history site

SharkyExtreme.com
Great site offering in-depth reviews of PC components

Subnetting
Great tutorial on how to subnet.

TCP/IP
Terrific tutorial site to teach yourself TCP/IP

TCP/IP Implementation
The most concise and best presented collection of information on TCP/IP Implementation, a must-know for networking professionals.

Technology Review
Great site from MIT regarding the latest technology

Tom's Hardware
Great site on PC hardware