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MCQs

Total Questions : 885 | Page 52 of 89 pages
Question 511. Baseband is
  1.    All of these
  2.    transmission of signals without modulation
  3.    the simultaneous transmission of data to a number of stations
  4.    a signal all of whose energy is contained within a finite frequency range
  5.    None of these
 Discuss Question
Answer: Option B. -> transmission of signals without modulation
Question 512. A 4 KHz noise less channel with one sample ever 125 per sec is used to transmit digital signals. Differential PCM with 4 bit relative signal value is used. Then how many bits per second are actually sent?
  1.    128 Kbps.
  2.    8 Kbps
  3.    64 Kbps
  4.    None of these
  5.    32 Kbps
 Discuss Question
Answer: Option E. -> 32 Kbps
Question 513. Which of the following frequency ranges is used for AM radio transmission?
  1.    Very High Frequency : 30 MHz to 300 MHz
  2.    Very Low Frequency : 3 kHz to 30 kHz
  3.    High Frequency : 3 MHz to 30 MHz
  4.    None of these
  5.    Medium Frequency : 300 kHz to 3 MHz
 Discuss Question
Answer: Option E. -> Medium Frequency : 300 kHz to 3 MHz
Question 514. To set up a bulletin board system you need
  1.    None of these
  2.    a personal computer
  3.    a smart modem with auto-answer capabilities
  4.    a telephone line
  5.    All of these
 Discuss Question
Answer: Option E. -> All of these
Question 515. X.21 is
  1.    None of these
  2.    a very common bit-oriented data link protocol issued by ISO
  3.    a method of determining which device has access to the transmission medium at any time
  4.    network access standard for connecting stations to a circuit-switched network
  5.    a method access control technique for multiple-access transmission media
 Discuss Question
Answer: Option D. -> network access standard for connecting stations to a circuit-switched network
Question 516. Which command-line tool is included with every Microsoft TCP/IP client?
  1.    None of these
  2.    WINS
  3.    PING
  4.    DHCP
  5.    WINIPCFG
 Discuss Question
Answer: Option C. -> PING
Question 517. If odd parity is used for ASCII error detection, the number of 0s per eight-bit symbol is _____.
  1.    indeterminate
  2.    42
  3.    even
  4.    odd
 Discuss Question
Answer: Option D. -> odd
Question 518. What is the minimum number of wires required for sending data over a serial communications links?
  1.    4
  2.    1
  3.    None of these
  4.    3
  5.    2
 Discuss Question
Answer: Option E. -> 2
Question 519. In cyclic redundancy checking, the divisor is _____ the CRC.
  1.    one bit less than
  2.    one bit more than
  3.    the same size as
  4.    two bits more
  5.    None of these
 Discuss Question
Answer: Option B. -> one bit more than
Question 520. What does the acronym ISDN stand for?
  1.    Integrated Services Digital Network
  2.    Integrated Services Data Network
  3.    None of these
  4.    Intelligent Services Digital Network
  5.    Indian Standard Digital Network
 Discuss Question
Answer: Option A. -> Integrated Services Digital Network

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