Networks

It is a digital telecommunications network that allows the nodes to share resources. In computer networks, computer devices exchange data with each other by connecting data links between nodes. These data links are transmitted through cable media, such as optical cables, wireless media, such as Wi-Fi. The network computing devices that originate, route and terminate the data are called network nodes. Users can include hosts, such as personal computers, telephones, servers, and network hardware. It can be said that two devices of this type are connected in red when a device can exchange information with the other device, whether or not they have a direct connection between them. In most cases, application-specific communication protocols overlap other more general communication protocols. This formidable collection of information technology requires trained network management to make everything work reliably. Computer networks support an enormous amount of applications and services, such as access to the World Wide Web, digital video, digital audio, sharing of applications and storage servers, printers and fax machines, and use of electronic mail and Instant messenger applications, as well as many others. Computer networks differ in the transmission medium for the transport of signals, the communication protocols for red traffic, the size of the network, the topology, the traffic control mechanism and the intention of the organization. The most known computer network is the Internet. It is a series of points, nodes, interconnected by means of communication in order to transmit, receive and exchange data, voice and video traffic. Network devices that include switches and routers use a variety of protocols and algorithms to exchange information and transport data to their desired endpoint. Each endpoint (sometimes called a host) in a network has a unique identifier, often an IP address or a media access control address, which is used to indicate the origin or destination of the transmission. Endpoints can include servers, personal computers, telephones and many types of network hardware.

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