Ethernet cord wires?

Question

I know that an ethernet cord has 8 wires in it but only uses 4 of them. So i was wondering which 4 it uses? Any help is much appreciated.

Answer 1

http://www.bluemax.net/techtips/networking/Wiring_Tips/Wiring100TX/colorcodestandards.htm

Answer 2

568A:standard-path
Pair 1=wire 1 and 2
wire 1=white-green
wire2 =green
pairs 2 = wire 3,4,5 and 6
wire 3= white - orange
wire 4 =blue
wire 5 = white-blue
wire 6= orange
pairs 3=wire 7 and 8
wire 7= white-brown
wire 8=brown
Only pairs 2 and are used for Standard Ethernet wiring.That mean only wires 3,4,5 and 6 use for standard Pairs 1 and 3 that mean wires 1,2 ,7 and 8 can be used for other purposes such as telephones or even a second separate.

Answer 3

Lets start with the Cat5e jack. I followed the T-568A standard, which is supposed to be the standard for new installations. The jacks have both the “A” and “B” color codes on them to make it easier to wire. Strip back about 3” of the Cat5e cable, we are going to be using the Orange and Green for the ethernet jack. The colors will match up perfectly to the T-568A colors on the side… Green to Green, White/Green to White Green, Orange to Orange, and White-Orange to White Orange. Punch them with the Punchdown Tool and you’re done. This jack will give you 10/100Mbps… you might want to label it differently or color code it if you also have a 1000Mbps jack.