Computer Networking
Which of the following transmission systems provides the highest data rate to an individual device

Telephone lines
leased lines
None of these
Computer bus
Voice band modem

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Computer Networking
Modulation is the process of

converting analog signals to digital signals
performing data encryption.
converting digital signals to analog signals
Multiplexing various signals into high speed line signals

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Computer Networking
An encyclopedic database

is easy for beginners to use
is an information utility that specializes in storing and searching information
is generally free
None of these
All of these

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Computer Networking
Ethernet networks can be cabled in a number of topologies, depending on what works best in each environment. As more nodes are added, the efficiency of Ethernet decreases. Select the best answer as to why Ethernet becomes less efficient as size increases.

Network collisions occur
"Line echo" occurs due to the impedance of the cable
Repeaters cannot increase the signal strength sufficiently
Cable terminators do not reflect the signal properly
Cable terminators do not absorb the signal properly

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