It sounds like you may be jumping into Networking for the first time so I'l give you a quick run down on what you need to know.What is Cross Over Vs Striaght Through Cable?
There are 8 coloured wires within your CAT5 Cable (assuming). Here is a map of the pins for you to understand:
Pin - 1: Green & White
Pin - 2: Green
Pin - 3: Orange & White
Pin - 4: Blue
Pin - 5: Blue & White
Pin - 6: Orange
Pin - 7: Brown & White
Pin - 8: Brown
This is a basic layout of what you will see when you look closely at the plug end on a CAT5 Cable.
One end will look like that and the other will look exactly the same if it is a Straight Through Cable
If its a Cross Over Cable
then one end will look like that and the other will have Pins 1 & 3 swapped also Pins 2 & 6 are swapped at the other end.When do I use a Cross Over or Straight Through Cable?
To answer that question is very simple. You use a Cross Over Cable
when networking 2 computers together from one Network Card in one computer to another.
A 3rd piece of the puzzle is needed when using a Straight Through Cables
and this is either a Hub, Switch or Router .... maybe a 4 Port Modem. A Box Networking device of some sort that you connect the Network Cards from computers to. Keep in mind that if you decided to learn how to crimp your own network cables there is a limit to the length you can make a CAT5 cable which is around about 80 metres, which is the length limit I use.
Do some research on what Hubs/Switchs/Routers are and you should have all the pieces now. Enjoy your Networking experience.