Communication Systems

 Internet  www  Intranets  Extranets  E-mail,

messaging and e-discussions  Electronic conferencing  Internet telephony  Cellular systems  Wi-Fi systems  Broadband

The Internet is a global system of interconnected computer networks that interchange data. It is a "network of networks" that consists of millions of private and public, academic, business, and government networks of local to global scope that are linked by copper wires, fiber-optic cables, wireless connections, and other technologies.

 Computer network

consisting of a collection of internet sites that offer text and graphics and sound and animation resources through the hypertext transfer protocol.

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An intranet is a private computer network that uses Internet protocols and network connectivity to securely share any part of an organization's information or operational systems with its employees. it is a more extensive part of the organization's computer infrastructure and private websites are an important component and focal point of internal communication and collaboration.

 Extranet

is a private network that uses the public telecommunication system to securely share part of an organization's information or operations with suppliers, vendors, partners, customers or other businesses. An extranet can be viewed as part of a company's intranet that is extended to users outside the company.

A system of world-wide electronic communication in which a computer user can compose a message at one terminal that can be regenerated at the recipient's terminal when the recipient logs in.

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Professionals in all fields are looking to Internet technology to find communication methods that encourage greater collaboration and are an efficient way of dispersing helpful and relevant information in a cost effective manner. One method that has become increasingly popular is conferencing, whether it be on “electronic bulletin Boards”, listservs, in chat rooms or using web-based meeting protocols.

 Enables

co.’s to use IT for telephone voice transmission over the internet or private networks.  Voice over IP(VOIP)-uses the internet protocol to deliever voice information in digital form using packet switching,avoiding the tolls charged by local and long distance telephone networks

A

hand-held mobile radiotelephone for use in an area divided into small sections, each with its own short-range transmitter/receiver.  DSL:A generic name for digital lines that are provided by telephone companies to their local subscribers and that carry data at high speeds

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Today's workforce, equipped with PDAs, laptops and other mobile devices, demand access to your network from wherever they are, without the hassle of a fixed network. WiFi allows your business to deploy a network more quickly, at lower cost, and with greater flexibility than a wired system. Productivity increases too, since workers can stay connected longer, and are able to collaborate with their co-workers as and where needed. WiFi networks are more fluid than wired networks. A network is no longer a fixed thing, networks can be created and ripped down in an afternoon instead of the days or weeks required to create a structured cable network.

Local

Area Network: A network of computers in a particular organization at a same physical organization. Metropolitan Area Network: A network of computers connected within a range of 10kms in an organization. Wide Area Network: A network of computers that a connected through a world wide web.

A

communications network in which the bandwidth can be divided and shared by multiple simultaneous signals (as for voice or data or video)