In other words, one printer can service the needs of many users. But to share resources some physical devices must be present in the network. Sometimes network board or network adapter is used in place of network interface card. The physical device that facilitates transmission of information across a network. This could be physical wires or wireless connections.
Transmission media can either be cable oriented or wireless.
Examples of unbounded media are radio wave, microwave, and infrared. Any device attached to the network capable of communicating with other network devices. The term workstation is often used in place of node, but in reality it could also be a network server. In large networks a server may run a special operating system, but smaller networks may use a server running a normal PC operating system. A network device that operates at the physical layer of the OSI model.