Practice | Hashtable

91. The _____ houses the switches in token ring.

A. transceiver

B. nine-pin connector

C. MAU

D. NIC

92. What device separates a single network into two segments but lets the two segments appear as one to higher protocols?

A. Switch

B. Bridge

C. Gateway

D. Router

Discuss

93. Which of the following refers to the terms residual error rate"?"

A. the number of bit errors per twenty four hours of continuous operation on an asynchronous line

B. The probability that one or more errors will be undetected when an error detection scheme is used

C. the probability that one or more errors will be detected when an error detection mechanism is used

D. signal to noise ratio divided by the ratio of energy per bit to noise per hertz

Discuss

94. Which of the following summation operations is performed on the bits to check an error-detecting code?

A. Codec

B. Coder-decoder

C. Checksum

D. Attenuation

Discuss

95. The research and development department at your office has been experimenting with different technologies to help improve the performance of the network. One group has been examining the use of a broadband network versus a based band network. Select the c

A. Broadband networks carry several channels on a single cable, whereas in a baseband network several cables carry one channel

B. Baseband networks carry a single channel on a single cable, whereas broadband networks carry several channels on a single cable

C. Baseband refers to local area networks, and broadband refers to wide area networks.

D. Baseband operates at a standard bit rate, whereas broadband may operate at different rates as needed

Discuss

96. An error-detecting code inserted as a field in a block of data to be transmitted is known as

A. Frame check sequence

B. Error detecting code

C. Checksum

D. flow control

Discuss

97. The cheapest modems can transmit

A. 300 bits per second

B. 1,200 bits per second

C. 2,400 bits per second

D. 4,800 bits per second

Discuss

98. Computers cannot communicate with each other directly over telephone lines because they use digital pulses whereas telephone lines use analog sound frequencies. What is the name of the device which permits digital to analog conversion at the start of a lo

A. Interface

B. Modem

C. Attenuation

D. Teleprocessor

Discuss

99. What is the usual number of bits transmitted simultaneously in parallel data transmission used by microcomputers?

A. 16

B. 9

C. 8

D. 4

Discuss

100. The receive equalizer reduces delay distortions using a

A. tapped delay lines

B. gearshift

C. descrambler

D. difference engine

Discuss