Computer Networking
Modulation is the process of

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

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

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Computer Networking
What is the purpose of flow control?

To provide a means for the receiver to govern the amount of data sent by the sender.
To regulate the size of each segment.
To reassemble segments in the correct order at the destination device.
To ensure that data is retransmitted if an acknowledgment is not received.

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