Communication system

Edit Watch this page Read in another language Wide area network Page issues A wide area network (WAN) is a   telecommunications network   or computer network   that extends over a large geographical distance. Wide area networks are often established with   leased telecommunication circuits . [1] Business, education and government entities use wide area networks to relay data to staff, students, clients, buyers, and suppliers from various locations across the world. In essence, this mode of telecommunication allows a business to effectively carry out its daily function regardless of location. The Internet   may be considered a WAN. [2] Related terms for other types of networks are personal area networks   (PANs),   local area networks   (LANs),   campus area networks (CANs), or   metropolitan area networks (MANs) which are usually limited to a room, building, campus or specific metropolitan area respectively. Design options Edit The textbook definition of

Edit Watch this page Read in another language History of communication Since prehistoric times, significant changes in communication technologies (media and appropriate inscription tools) have evolved in tandem with shifts in political and economic systems, and by extension, systems of power. Communication can range from very subtle processes of exchange, to full conversations and mass communication. Human communication was revolutionized with the origin of speech   approximately 500,000 years ago. Symbols were developed about 30,000 years ago. The imperfection of speech, which nonetheless allowed easier dissemination of ideas and stimulated   inventions , eventually resulted in the creation of new forms of communications, improving both the range at which people could communicate and the longevity of the information. All of those inventions were based on the key concept of the symbol. The oldest known symbols created for the purpose of communication were   cave painti