Practice Quiz in Digital and Data Communication Networks Part 7

Online Practice Quiz in Digital and Data Communication Networks part 7 as one of the Communications Engineering topic.

Quiz in Digital and Data Communication Networks

This is the Online Practice Quiz in Digital and Data Communication Networks Part 7 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 VII of the Online Practice Quiz

Quiz in TITLE

Question 61. A data packet is a packet header together with

A. A network layer

B. An administrative layer

C. User data

D. A packet switch


Question 62. Communications protocols always have a

A. Set of symbols

B. Start of header

C. Special flag symbol

D. BCC


Question 63. DCE and DTE

A. Means “digital communications equipment” and “digital termination equipment”

B. Are connected by either two or four wires

C. Refer to the modem and the computer or terminal, respectively

D. Any of these


Question 64. What is one principal difference between synchronous and asynchronous transmission?

A. The bandwidth required is different

B. The pulse heights are different

C. The clocking is mixed with the data in asynchronous

D. The clocking is derived from the data in synchronous transmission


Question 65. The scrambler in a synchronous modem is in the

A. Control section

B. Receiver section

C. Transmitter section

D. Terminal section


Question 66. The X.25 standard for packet networks is analogous to

A. PBX standards for a telephone network

B. Handset standards for a telephone

C. Local loop standards for a telephone network

D. Switching standards for a telephone network


Question 67. The X.25 standard covers how many OSI layers?

A. Three

B. Four

C. Seven

D. None of these


Question 68. Which of the following is possible in a token-passing bus network?

A. Unlimited number of stations

B. Unlimited distances

C. Multiple time division channels

D. In-service expansion


Question 69. Which code set is used to BiSync when using VRC/LRC but not operating in transparency mode

A. EBCDIC

B. ASCII

C. SBT

D. Fieldata


Question 70. Loading refers to the addition of

A. Resistors

B. Capacitors

C. Bullets

D. Inductance

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