NTA-NET (UGC-NET) Computer Science & Applications (87) Networks, Virtualization, & Cloud Computing-Data Communication Study Material (Page 8 of 20)

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Light Wave Transmission

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Light Wave Transmission

  • The electromagnetic spectrum diagram itself tells us the location of the light wave or the visible light spectrum. Beyond the terminologies of the Computers science and networks, the light waves are phenomenons which have been vastly studied in Physics etc. However, for our exam purposes, we are more likely to encounter basic understanding or at maximum we can expect mathematical questions for measuring speed etc.
  • The most interesting thing about the l…

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Telephones, ISDN, ATM

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Telephones, ISDN, ATM

  • As everyone knows, the telephone network is a telecommunications network used for telephone calls between two or more parties. We are more concerned about the process here. Technically, a telephone converts sound, typically the human voice, into electronic signals that are transmitted via cables and other communication channels to another telephone which reproduces the sound to the receiving user. Here we are supposed to see the different types of the telephone network,

Public Switched Telephone Network or PSTN

  • A very simple landline network where the telephones must be directly wired into a single telephone exchange. It is the aggregate of the world՚s circuit-switched telep…

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