Computer network

         Computer network is a system of a computer connected to another computer with the help of certain devices and media that work together. Judging from the sense or meaning of that definition was in a computer network comprises at least two computers, tools and media liaison. Computer network can also consist of thousands of computers with a very wide range of locations, spanning the entire world like the internet, because the internet basically is a computer network. 

 

         Computer network was made for for a specific purpose such as resource efficiency with usage of the resources together: for example the use of shared printers, scanners, etc; Communications: for example, electronic mail (e-mail), information or data access: accessing customer data in a bank or access the website in the internet.
         Auxiliary devices in a network can be hardware i.e. network card (network interface card / NIC) installed on each computer and interconnection equipment such as Hub, Bridge, Switches etc. Other device in the form of software (software) is a network operating system software (Noss) which serves to make the management of network systems, for example: Windows for Workgroup etc.

        Connection medium or medium of data transmission in computer networks can be either wired or wireless such as radio or microwave.