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Computer Networking

Computer Networking
The size or magnitude of a voltage or current waveform is

Amplitude
Aloha
Attenuation
Angle Modulation
None of these

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Computer Networking
Compared to analog signals, digital signals

All of these
both A and B
allow faster transmission
are more accurate
None of these

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Computer Networking
The EIA-232 interface has _____ pins.

24
30
20
25
None of these

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Computer Networking
In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN?

When upper-layer protocols require high reliability
During high-traffic periods
After broken links are reestablished
In an improperly implemented redundant topology

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Computer Networking
The data communication support should include, but is not restricted to

terminal support, electronic mail and voice grams.
file transfer and transaction processing
All of these
file and database access

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Computer Networking
A 2000-character text file has to be transmitted by using a 1,200 baud modem. Can you tell how long will it take?

2 seconds
None of these
120 seconds
12 seconds
20 seconds

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