Q.1
Which data communication method is used to transmit the data over a serial communication link?
  • Simplex
  • Half-duplex
  • Full duplex
  • All of above
Q.2
Which of the following performs modulation and demodulation?
  • fiber optics
  • switch
  • modulator
  • modem
Q.3
Transmission media lie below the _______ layer.
  • physical
  • network
  • transport
  • application
Q.4
Twisting in a twisted-pair help reduce the __________.
  • length
  • cost
  • noise
  • None of the choices are correct
Q.5
In electromagnetic spectrum for wireless communication, reserved range for Radio waves and microwaves is known as
  • ground propagation
  • sky propagation
  • line-of-sight propagation
  • None
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