There are many Ethernet cables that can be bought. Often these cables are supplied free with equipment that uses Ethernet connectivity in some way or another. There are several different varieties of Ethernet cable that can be obtained: speed variations, crossover cables, Cat 5, Cat 5e, Cat6, Cat 6a, Cat 7etc.. There are different codes used to indicate the differs types of shielding: U/UTP - Unshielded cable, unshielded twisted pairs F/UTP - Foil shielded cable, unshielded twisted pairs U/FTP - Unshielded cable, foil shielded twisted pairs S/FTP - braided shielded cable, foil shielded twisted pairs Where: TP = twisted pair, U = unshielded, F = foil shielded, S = braided shielding.