Practice Quiz in Digital and Data Communication Networks Part 6

(Last Updated On: December 20, 2017)

Quiz in Digital and Data Communication Networks

This is the Online Practice Quiz in Digital and Data Communication Networks Part 6 as one of the Communications Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Examination Questions in Electronic System and Technologies, Communications Books, Journals and other Communications References.

Continue Part VI of the Online Practice Quiz

Quiz in Digital and Data Communication Networks

Question 51. The correctness and the accuracy of the transmitted message content is

A. Verified by the modem

B. Determined by the sender and receiver, not by the communications system

C. Ensured by use of digital techniques

D. None of these

Question 52. How many messages may be acknowledged on a BiSync link?

A. 1

B. 2

C. 4

D. 8

Question 53. The X.25 standard specifies a

A. Technique for dial access

B. Technique for start-stop data

C. Data bit rate

D. DTE/DCE interface

Question 54. Which of the following cannot be provided in a broadband LAN?

A. Frequency agile modems

B. Closed-circuit TV

C. Voice circuits

D. Fiber optics transmission

Question 55. Which of the following is not a motivation in digitizing a voice signal in the telephones of a digital PBX?

A. Simplified control signalling

B. Lower cost telephones

C. Fewer wire pairs

D. Multiplexed voice and data channels

Question 56. Which of the following transmission media is not readily suitable to CSMA operation?

A. Radio

B. Optical fibers

C. Coaxial cable

D. Twisted pair

Question 57. RS-232, RS-449, RS-530, V.24, and X.21 are examples of

A. Standard for various types of transmission channels

B. Standard for interfaces between terminal and modems

C. Standards for between modems and transmission facilities

D. Standards for end-to-end performance of data communications system

Question 58. Asynchronous transmission

A. Is less efficient than synchronous, but simpler

B. Is much faster than synchronous transmission

C. Is another name for isochronous transmission

D. None of these

Question 59. Transmission of binary signals requires

A. Less bandwidth than analog

B. More bandwidth than analog

C. The same bandwidth as analog

D. Cannot be compared with the transmission of analog signals

Question 60. In X.25 network layer protocol, the data packets normally contain

A. One octet of header plus data

B. Two octets of header plus data

C. Three octets of header plus data

D. Four octets of header plus data

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