for two pc's we need only cable and nic rj 45
Networking.
You will need a router, wireless adapter, to have a network connecting computers
http://compnetworking.about.com/od/homenetworking/a/connecttwocomp.htm
Units
if its gaming i would recomend an ad Hoc connection or wifi
All the components needed to connect 2 computers together are two Ethernet cards, a network switch and 2 Ethernet cables. Alternatively a single USB transfer cable can be used for simple file transfers.
A network is a connection of two or more computers in a communication array. You can't really have a network with only one computer.
"American" computers, like almost all other computers in the world, have two main standards for connecting a hard drive. Older computers primarily used a standard referred to as ATA, PATA, or IDE. Newer computers use a SATA interface. If your drive is one of these two standards, you can use it in an "American" computer.
When connecting two computers, use cross-over. Cross-over is required to connect the transmit and receive terminals of the two endpoints. When connecting through a router, switch or hub, use straight-through. The router, switch or hub provides the crossover.
The definition of connecting wire is a piece of wire used to attach two circuits or components together. The gauge or size of the wire must be large enough to support the amount of current flow.
Anything required for the connection is called a network.
Your computer will have a section call network connections, this folder will offer you a step by step for connecting these two computers.