Right you are! Twists for shielding, two pairs for duplex - which means that since the 90s on, you practically always want two pairs pr connector to enable dupl

Right you are! Twists for shielding, two pairs for duplex - which means that since the 90s on, you practically always want two pairs pr connector to enable duplex (be it 100mbit or faster). Ed: but probably 4 for gigE.