By the end of 2008 it is estimated that 52% of American households will have a computer network set up, allowing more than one computer to access the internet at any given time. Defined in it’s simplest form, a computer network is two or more computer systems linked by either a cable or a wireless device, sharing files or internet access. If there is no central server in use then the network is called a peer to peer network, of P2P, in which all computers are equal. This is also known a workgroup, a name coined by Microsoft.