Doctrine has it that more than 50% of the world's network problems have nothing whatsoever to do with software configuration. I personally would be inclined to say that's a little high, but 25% would probably be fair. Here are some of the things you may encounter. Common Problems
Tip: In the absence of a cable tester, it's not a bad idea to keep one "known good" cable around for diagnostic purposes. Tip: It is dramatically cheaper to manufacture your own cables than to buy them pre-prepared. Good cable crimpers are commercially available for about $40 at most computer and electronic stores. For another $50 you can get 200 meters of Cat-5 UTP and a box full of jacks . Compare this to a 30-meter length of pre-prepared cable for $79.99. Diagnostics of Physical Connection Problems
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