Telecommunication, Describes history of telecommunication from Telegraph to LAN's

Subject  > Science Essays  > Technology

1. Introduction         Computer and telephone networks inflict a gigantic impact on today's society. From letting you call John in Calgary to letting you make a withdraw at your friendly ATM machine they control the flow of information. But today's complicated and expensive networks did not start out big and complicated but rather as a wire and two terminals back in 1844. From these simple networks to the communication giants of today we will look at the evolution of the network and the basis on which it functions. 2. The Beginnings 2.1. Dot Dot Dot Dash Dash Dash Dot Dot Dot         The network is defined as a system of lines or structures ...

... networks use the same addressing protocol, bridges can be used to link them, however, if they use different addressing protocols, only routers may be used. During these times MANs (Metropolitan Area Networks) are in use and development today. These use routers that are connected preferably via a fiber optic cable, to create one large network. 5.2. Pluto Calling Earth!         Any networks larger than 1000m typically rely on telephone digital lines for data transfer. These networks are called Circuit Switched Digital Networks . Circuit Switched Digital Networks utilize a switching matrix at the central office of a telephone company that connects local calls to long distance services.

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