- its allows computer to exchange data
- passes data to each other along data connections
- the connections are established using either cable media or wireless media
- the best known computer network is known as the Internet
- designed for entry-level students to develop skills needed to gain employment as computer network installation, configuration, and support technicians
Network computer devices that originate, route and terminate the data are called network nodes.Nodes can include hosts such as servers and personal computers, as well as networking hardware. Two devices are said to be networked when a device is able to exchange information with another device.
Computer networks support applications such as access to the World Wide Web, shared use of application and storage servers, printers, and fax machines, and use of email and instant messaging applications. Computer networks differ in the physical media used to transmit their signals, the communications protocols to organize network traffic, the network's size, topology and organizational intent.
Mobile Network:
- can make and receive telephone calls over a radio link while moving around a wide geographic area
- by connecting a cellular network provided by a mobile phone operator
- as a convenient tool to stay in touch with people
In addition to telephony, modern mobile phones also support a wide variety of other services such as text messaging, MMS, email, Internet access, short-range wireless communications (infrared, Bluetooth), business applications, gaming and photography. Mobile phones that offer these and more general computing capabilities are referred to as smartphones.
This technology works by dividing the Earth into small regions called cells. Within each cell the wireless telephone signal goes over its assigned bandwidth to a cell tower, which relays the signal to a telephone switching network, connecting the user to the desired party.
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