To connect a computer with a device in the same room, you might be likely to use
A. a coaxial cable
B. a dedicated line
C. a ground station
D. All of the above
E. None of the above
Select an option to see the answer and solution.
Internet-like networks within an enterprise.
A. Intranets
B. Switching alternating
C. Inter organizational networks
D. Extranets
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How many bits internet address is assigned to each host on a TCP/IP internet which is used in all communications with the host?
A. 16 - bits
B. 32 - bits
C. 48 - bits
D. 64 - bits
E. None of the above
Select an option to see the answer and solution.
With an IP address of 100, you currently have 80 subnets. What subnet mask should you use to maximize the number of available hosts?
A. 192
B. 224
C. 240
D. 248
E. 252
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Which of the following types of channels moves data relatively slowly?
A. wideband channel
B. voiceband channel
C. narrowband channel
D. broadband channel
E. None of the above
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Which of the following is required to communicate between two computers?
A. communications software
B. protocol
C. communications hardware
D. access to transmission medium
E. All of the above
Select an option to see the answer and solution.
Which of the following does not allow multiple users or devices to share one communications line?
A. doubleplexer
B. multipplexer
C. concentrator
D. controller
E. None of the above
Select an option to see the answer and solution.
The geostationary satellite used for communication systems
A. rotates with the earth
B. remains stationary relative to the earth
C. is positioned over equator
D. All of the above
E. None of the above
Select an option to see the answer and solution.
Telecommunication networks frequently interconnect an organization with its customers and suppliers. Select the best fit for answer:
A. Bandwidth alternatives
B. Switching alternating
C. Inter organizational networks
D. Extranets
E. None of the above
Select an option to see the answer and solution.
The packets switching concept was first proposed
A. in the late 1980s for the Defense Ministry of US.
B. in the early 1960s for military communication systems, mainly to handle speech
C. in the late 1950s for Defense Ministry of US
D. All of the above
E. None of the above
Select an option to see the answer and solution.
The _____ houses the switches in token ring.
A. transceiver
B. nine-pin connector
C. MAU
D. NIC
E. None of the above
Select an option to see the answer and solution.
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
Select an option to see the answer and solution.
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
E. None of the above
Select an option to see the answer and solution.
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
E. Broadband and baseband refer to the different frequencies at which infrared operates then transmitting signals in certain conditions
Select an option to see the answer and solution.
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 correct statement about broadband and baseband.
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
E. Broadband and baseband refer to the different frequencies at which infrared operates then transmitting signals in certain conditions
Select an option to see the answer and solution.
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
E. None of the above
Select an option to see the answer and solution.
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
E. None of the above
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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 long distance transmission?
A. Interface
B. Modem
C. Attenuation
D. Teleprocessor
E. None of the above
Select an option to see the answer and solution.
What is the usual number of bits transmitted simultaneously in parallel data transmission used by microcomputers?
A. 16
B. 9
C. 8
D. 4
E. None of the above
Select an option to see the answer and solution.
The receive equalizer reduces delay distortions using a
A. tapped delay lines
B. gearshift
C. descrambler
D. difference engine
E. None of the above
Select an option to see the answer and solution.