What is category 5 (or Category 5e or Category 6) cabling

Category 5 UTP (Unshielded Twisted Pair) cable is defined by the EIA/TIA for use with 10 and 100 MB LANs (10baseT and 100baseT) as specification number EIA/TIA-568A. Category 5e is a slightly improved specification published as EIA/TIA-568A-A-5 . Category 6 is defined by EIA/TAI-568-B.2-1.