Are there any utilities or simple tools or techniques to easily test a CAT5 cable, to see how well was it installed?
Cat5 is often installed by amateurs, but has been installed and "working" for years. Proper cable testers and certifiers like a Fluke or LanTech often cost over USD$1000 and people who have them are few.
Aren't there some sort of special network cards, or USB cat5-testing devices, one can plug into a computer and test the cat5 with software? Perhaps an Intel utility for their cards?