CertiGuide to A+ (A+ 4 Real)  9  Chapter 13: Basic Networking Terminology       9  Cables and Fibers

Thick, not Thin 1 RG-58U vs. RG-58AU

The first option to appear that didn't involve wrestling and building upper body strength faster than a Bow flex exercise machine was a thinner version of the frozen garden hose, called Thinnet.

Still a copper core and with a plastic cladding, then the metal braided sheath to control interference, coated with a plastic wrapper. Only this entry was as thin as the cable for TV. They look identical, and the only difference is the Ohm ratings.

TV is 75 Ohm, while thinnet is 50 Ohm. Thinnet is called RG-58 U and it even comes in a version known as RG-58 AU, which has a braided copper center instead of the solid copper center found in RG-58 U.

Thick, not Thin 1 RG-58U vs. RG-58AU