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True or False
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1
The amount of digital information that can be transmitted is proportional to the bandwidth of the communication channel and the time of transmission.
A)True
B)False
2
Data processed and stored by computers cannot be numerical or text.
A)True
B)False
3
The Morse code, originally designed for wired telegraph communication and later adapted for radio communications, consists of dots and dashes.
A)True
B)False
4
The most widely used data communication code is the 7-bit binary code known as the American Standard Code for Information Interchange.
A)True
B)False
5
Parallel data transmission is not practical for long-distance communication.
A)True
B)False
6
In synchronous transmission each data word is accompanied by start and stop bits that indicate the beginning and ending of the word.
A)True
B)False
7
The technique of transmitting each data word one after another without start and stop bits, usually in multiword blocks, is referred to as synchronous data transmission.
A)True
B)False
8
In the nonreturn to zero method of encoding the signal remains at the binary level assigned to it for the entire bit time.
A)True
B)False
9
Transmission efficiency is the accuracy and speed with which information is sent and received over communication media.
A)True
B)False
10
Narrowing the bandwidth of a communication channel decreases harmonic activity but degrades the quality of the transmitted signal.
A)True
B)False
11
Data compression circuits are used in some modems because the compressed message can be transmitted more quickly.
A)True
B)False
12
The standard telephone system provides significantly higher data rates than can be achieved with cable modems.
A)True
B)False
13
The number of bit errors that occur for a given number of bits transmitted is referred to as the bit error rate.
A)True
B)False
14
One of the most widely used systems of error detection is known as parity.
A)True
B)False
15
Interleaving is a method used in wireless systems to reduce the effects of burst errors.
A)True
B)False





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