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Computer Networking

Computer Networking
What is the number of separate protocol layers at the serial interface gateway specified by the X.25 standard?

None of these
6
3
2
4

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Computer Networking
The ________ measures the number of lost or garbled messages as a fraction of the total sent in the sampling period.

Connection release failure probability.
Residual Error Rate.
Transfer Failure Probability.
Connection establish.

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Computer Networking
The simultaneous transmission of data to a number of stations is known as

Band width
None of these
Aloha
Analog transmission
broadcast

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Computer Networking
In a synchronous modem, the digital-to-analog converter transmits signal to the

terminal
None of these
demodulator
modulator
equalizer

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Computer Networking
You are working with three networks that have the network IDs 192.168.5.0, 192.168.6.0, and 192.168.7.0. What subnet mask can you use to combine these addresses into one?

255.255.252.0
255.255.255.252
225.255.254.0
255.255.255.240

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Computer Networking
Which class of IP address provides a maximum of only 254 host addresses per network ID?

Class C
Class D
Class B
Class A

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