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Computer Networking

Computer Networking
Which network topology is considered passive?

Cross
Bus
Star
Ring
Mesh

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Computer Networking
An example of a medium-speed, switched communications service is

Series 1000
Dataphone 50
All of these
None of these
DDD

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Computer Networking
The most flexibility in how devices are wired together is provided by

ring networks
T-switched networks
star networks
None of these
bus networks

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Computer Networking
A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?

Decrease the window size.
Decrease the sequence number.
Send a different source port number.
Restart the virtual circuit.

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Computer Networking
A 6-MHz channel is used by a digital signaling system utilizing 4-level signals. What is the maximum possible transmission rate?

12 Mbaud/sec
1.5 Mbaud/sec
6 Mband/sec
None of these
24 Mbaud/sec

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Computer Networking
To avoid transmission errors, a check figure is calculated by the

receiving computer
None of these
transmitting computer
both A and B
Start and stop bit

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