Computer Science :: Computer Networking
- The _____ houses the switches in token ring.
- What device separates a single network into two segments but lets the two segments appear as one to higher protocols?
- Which of the following refers to the terms "residual error rate"?
- Which of the following summation operations is performed on the bits to check an error-detecting code?
- 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.
- An error-detecting code inserted as a field in a block of data to be transmitted is known as
- The cheapest modems can transmit
- 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?
- What is the usual number of bits transmitted simultaneously in parallel data transmission used by microcomputers?
- The receive equalizer reduces delay distortions using a
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A.
the number of bit errors per twenty four hours of continuous operation on an asynchronous line |
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B.
The probability that one or more errors will be undetected when an error detection scheme is used |
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C.
the probability that one or more errors will be detected when an error detection mechanism is used |
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D.
signal to noise ratio divided by the ratio of energy per bit to noise per hertz |
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E.
None of the above |
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A.
Broadband networks carry several channels on a single cable, whereas in a baseband network several cables carry one channel |
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B.
Baseband networks carry a single channel on a single cable, whereas broadband networks carry several channels on a single cable |
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C.
Baseband refers to local area networks, and broadband refers to wide area networks. |
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D.
Baseband operates at a standard bit rate, whereas broadband may operate at different rates as needed |
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E.
Broadband and baseband refer to the different frequencies at which infrared operates then transmitting signals in certain conditions |