Inside of an ethernet cable, what are the wires specifically used for? I know that the orange and green pair are used for pins 1,2,3,6 sending/receiving but what about pins 4,5,7,8 blue,
Coaxial cable - Wikipedia
How to Create an Ethernet Cable: 11 Steps (with Pictures)
How to Wire an Ethernet Cable: 8 Steps (with Pictures) - wikiHow