A computer network, often simply referred to as a network, is a collection of computers and devices interconnected by communications channels that facilitate communications among users and allows users to share resources. Networks may be classified according to a wide variety of characteristics. A computer network allows sharing of resources and information amonginterconnected devices.
What is a Computer client?
A client is an application or system that accesses a remote service on another computer system, known as a server, by way of a network. The term was first applied to devices that were not capable of running their own stand-alone programs, but could interact with remote computers via a network.
What is a computer server?
A server computer is acomputer, or series of computers, that link other computers or electronic devices together. They often provide essential services across a network, either to private users inside a large organization or to public users via the internet. For example, when you enter a query in a search engine, the query is sent from your computer over the internet to the servers that store all the relevant web pages.The results are sent back by the server to your computer.
A local area network (LAN) is a computer network that connects computers and devices in a limited geographical area such as home, school, computer laboratory or office building. The defining characteristics of LANs, in contrast to wide area networks (WANs), include their usually higher data-transfer rates, smallergeographic area, and lack of a need for leased telecommunication lines.
A personal area network (PAN) is a computer network used for communication among computer devices, including telephones and personal digital assistants, in proximity to an individual's body. The devices may or may not belong to the person in question.
|Man network |
A metropolitan area network (MAN)is a large computer network that usually spans a city or a large campus.
A wide area network (WAN) is a computer network that covers a broad area (i.e., any network whose communications links cross metropolitan, regional, or national boundaries)
A Value-added Network (VAN) is a hosted service offering that acts as an intermediary between business partners sharingstandards based or proprietary data via shared Business Processes. The offered service is referred to as "Value-added Network Service"
Generic Access Network or GAN is a telecommunication system that extends mobile voice, data and IP Multimedia Subsystem/Session Initiation Protocol (IMS/SIP) applications over IP networks. Unlicensed Mobile Access or UMA is the commercial nameused by mobile carriers for external IP access into their core networks.
Network topology is the layout pattern of interconnections of the various elements (links, nodes, etc.) of a computer network.
A ring network is a network topology in which each node connects to exactly two other nodes, forming a single continuous pathway for signals through each node -a ring. Data travels from node to node, with each node along the way handling every packet.
The bus topology
A bus network topology is a network architecture in which a set of clients are connected via a shared communications line, called a bus. There are several common instances of the bus architecture, including one in the motherboard of most computers, and those in some versionsof Ethernet networks.
Star networks are one of the most common computer network topologies. In its simplest form, a star network consists of one central switch, hub or computer, which acts as a conduit to transmit messages.
A network protocol defines rules and conventions for communication between network devices. Protocols for computer networking all...