what are the characteristics of channels(communication)

by Guest12393568  |  11 years, 2 month(s) ago

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what are the characteristics of channels(communication)

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  1. Guest22547645


  2. Leonardo
    A channel can take many forms, including ones suitable for storage which can communicate a message over time as well as space. Examples of communications channels include: 1. A connection between initiating and terminating nodes of a circuit. 2. A buffer from which messages can be put and gotten. See Actor model and process calculi for discussion on the use of channels. 3. A single path provided by a transmission medium via either * physical separation, such as by multipair cable or * electrical separation, such as by frequency-division or time-division multiplexing. 4. A path for conveying electrical or electromagnetic signals, usually distinguished from other parallel paths. 5. The portion of a storage medium, such as a track or a band, that is accessible to a given reading or writing station or head. 6. In a communications system, the part that connects a data source to a data sink. 7. A specific radio frequency, pair or band of frequencies, usually named with a letter, number, or codeword, and often allocated by international agreement. Examples: * Marine VHF radio uses some 88 channels in the VHF band for two-way FM voice communication. Channel 16, for example, is 156.800MHz. In the US, seven additional channels, WX1 - WX7, are allocated for weather broadcasts. * Television channels such as North American TV Channel 2 = 55.25MHz, Channel 13 = 211.25MHz. Each channel is 6MHz wide. Besides these "physical channels", television also has "virtual channels". * Wi-Fi consists of unlicensed channels 1-13 from 2412MHz to 2484MHz in 5MHz steps. 8. A room in the Internet Relay Chat (IRC) network, in which participants can communicate with each other. All of these communications channels share the property that they transfer information. The information is carried through the channel by a signal.

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