60) A 3000 Hz bandwidth noisy channel transmits bits with a signal to thermal noise ratio of 30 dB. What is the maximum data rate of the channel ?

61) Which of the following access control methods is probabilistic

62) In stop-and-wait ARQ, if data 1 has an error, then receiver sends which frame

63) In which communication, poll/select method used to determine control of the line ?

64) The secondary device in a multipoint configuration sends data in response to which of the following event