Practice Quiz in Digital and Data Communication Networks Part 10

This is the Online Practice Quiz in Digital and Data Communication Networks Part 10 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.

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Quiz in Digital and Data Communication Networks Question 91. Which of the following LAN architectures can be expanded to the greatest total system bandwidth? A. Digital PBX B. CSMA/CD baseband system C. Token-passing network D. Broadband cable system Question 92. Synchronous modems cost more than asynchronous modems because A. They are larger B. They must contain clock recovery circuits C. The production volume is larger D. They must operate on a larger bandwidth Question 93. Which of the following functions is not provided as part of the basic Ethernet design? A. Access control B. Addressing C. Automatic retransmission of a message D. Multiple virtual networks Question 94. Binary codes are sometimes transformed in modems into A. Hexadecimal B. Huffman codes C. Gray code D. Complementary codes Question 95. Which of the following systems provides the longest digital transmission distances? A. Voiceband modem B. Local area network C. Computer bus D. Digital PBX Question 96. Redundancy measures A. Transmission rate of a system B. How likely symbols are to be repeated C. Time between failures D. System cost Question 97. Which of the following is not possible in a token-passing loop network? A. Unlimited number of stations B. Unlimited distances C. Multiple time division channels D. In-service expansion Question 98. The receiver equalizer in a synchronous modem is called A. A compromise equalizer B. A statistical equalizer C. An adaptive equalizer D. An impairment equalizer Question 99. Which of the following data communications functions is generally provided for in a LAN? A. Data link control B. Applications processing C. Flow control D. Routing Question 100. Two-state (binary) communications systems are better because A. They can interface directly with the analog telephone network B. The components are simpler, less costly, and more reliable C. People think better in binary D. Interstate calls are less costly

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