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,
![Connecting straight-through and crossover UTP cables in the ETHERNET - Foxtrot basic modules / Teco Wiki Connecting straight-through and crossover UTP cables in the ETHERNET - Foxtrot basic modules / Teco Wiki](https://wiki.tecomat.cz/storage/app/files/wiki/6DWVda.png)
Connecting straight-through and crossover UTP cables in the ETHERNET - Foxtrot basic modules / Teco Wiki
![layer1 - What is this thread-like material on this Cat6 U/UTP cable? - Network Engineering Stack Exchange layer1 - What is this thread-like material on this Cat6 U/UTP cable? - Network Engineering Stack Exchange](https://i.stack.imgur.com/7N00d.jpg)