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Total Questions : 885 | Page 43 of 89 pages
Question 421. To avoid transmission errors, a check figure is calculated by the
  1.    receiving computer
  2.    None of these
  3.    transmitting computer
  4.    both A and B
  5.    Start and stop bit
 Discuss Question
Answer: Option D. -> both A and B
Question 422. What is the first octet range for a class A IP address?
  1.    1 - 127
  2.    1 - 126
  3.    128 - 191
  4.    192 - 223
  5.    192 - 255
 Discuss Question
Answer: Option B. -> 1 - 126
Question 423. Which of the following is not a standard synchronous communication protocol?
  1.    SMTP
  2.    PAS
  3.    SDLC
  4.    SLIP
  5.    None of these
 Discuss Question
Answer: Option B. -> PAS
Question 424. Typewriter terminals can print computer-generated data at a rate of
  1.    1200 characters per minute
  2.    None of these
  3.    10 characters per second
  4.    120 characters per second
  5.    120 characters per minute
 Discuss Question
Answer: Option D. -> 120 characters per second
Question 425. A subdivision of main storage created by operational software is referred to as a:
  1.    partition
  2.    compartment
  3.    None of these
  4.    divided core
  5.    time-shared program
 Discuss Question
Answer: Option A. -> partition
Question 426. What is the first octet range for a class B IP address?
  1.    192 - 223
  2.    127 - 191
  3.    128 - 191
  4.    1 - 127
  5.    128 - 255
 Discuss Question
Answer: Option C. -> 128 - 191
Question 427. The network layer, in reference to the OSI model, provide
  1.    data link procedures that provide for the exchange of data via frames that can be sent and received
  2.    the interface between the X.25 network and packet mode device
  3.    None of these
  4.    All of these
  5.    the virtual circuit interface to packet-switched service
 Discuss Question
Answer: Option E. -> the virtual circuit interface to packet-switched service
Question 428. Which of the following communications lines is best suited to interactive processing applications?
  1.    full-duplex lines
  2.    simplex lines
  3.    mixed band channels
  4.    None of these
  5.    narrowband channels
 Discuss Question
Answer: Option A. -> full-duplex lines
Question 429. RS-232-G
  1.    is an interface between two data circuit terminating equipment as examplified by a local and remote modem
  2.    is an interface standard between Data terminal Equipment and Data Circuit Terminating Equipment
  3.    specifies only the mechanical characteristics of an interface by providing a 25-pin connector
  4.    requires only 7 pin out of 25 in order to transmit digital data over public telephone lines
  5.    None of these
 Discuss Question
Answer: Option B. -> is an interface standard between Data terminal Equipment and Data Circuit Terminating Equipment
Question 430. RS-449/442-A/423-A is
  1.    a set of physical layer standards developed by EIA and intended to replace RS-232-
  2.    the ratio of the number of data units in error to the total number of data units
  3.    a code in which each expression conforms to specific rules of construction, so that if certain errors occur in an expression the resulting expression will not conform to the rules of construction and
  4.    None of these
  5.    a check bit appended to an array of binary digits to make the sum of the all the binary digits
 Discuss Question
Answer: Option A. -> a set of physical layer standards developed by EIA and intended to replace RS-232-

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