Suddenly a Car Did a High Speed U Turn and Roared Off. the Driver Must Have Smelled a Rat

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  • Topic: Satellite, Communications satellite, Geosynchronous orbit
  • Pages : 2 (331 words )
  • Download(s) : 501
  • Published : October 18, 2012
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COVER PAGE
SCHOOL: BON AIR SECONDARY SCHOOL
OUR TOPIC: COMMUNICATION SATELITES, NETWORKS, EXTRANETS
DATE: 08/10/12
CLASS: 3:3
SUBJECT: COMPUTER STUDIES
TEACHER: P.GRANSAM
GROUP MEMBERS: KYLE, ISAIAH, NICQUAN, HANNAH,EMMANUEL

COMMUNICATION SATELLITES
A communication satellite is an artificial satellite sent to space for the purpose of telecommunications. Modern communications satellites use a variety of orbits including: geostationary, molniya orbits, elliptical orbits, and low (polar and non-polar earth orbits. For fixed (point to point) services, communication satellites provide a microwave radio relay technology complementary to that of communication cables. They are also used for mobile applications such as communications ships, vehicles, planes and hand – held terminals and for TV and radio broadcasting.
NETWORKS
A computer network, or simply a network is a collection of computers and other hardware components interconnected by communication channels that allow sharing of resources and information .where at least one process in one device is able to send/receive data to/from at least one process residing in a remote device, then the two devices are said to be in a network. Simply, more than one computer interconnected through a communication medium for information interchange is called a computer network. Networks may be classified according to a wide variety of characteristics, such as the medium used to transport the data, communications protocol used, scale, topology and organizational scope.

EXTRANETS
An extranet is a computer network that allows controlled access from the outside, for specific business or educational purposes. In a business-to-business context, an extranet can be viewed as an extension of an organization's intranet that is extended to users outside the organization, usually partners, vendors, and suppliers, in isolation from all other Internet users. In...
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