Types of UTP cables

(U/UTP) - simple twisted-pair

(U/FTP) - each pair is foiled

(F/UTP, S/UTP, SF/UTP)  - all 4 pairsare foiled (F) or shielded (S) together / each pair is without any shield and divided by plastic cross-divider

(F/FTP, S/FTP, SF/FTP) - all 4 pairsare foiled (F) or shielded (S) together / each pair is foiled

U - unshielded

F - foil

S - shield (grid of thin wires)

CAT 5e, 6/6A и 8/8.1 - are mainly F/UTP

CAT  7/7A и 8.2 - are mainly S/FTP