Computer Networking
Business meeting and conferences can be held by linking distantly located people through a computer network. Not only the participants exchange information but are able to see each other. What is it called?

Teletalking
None of these
Teleconferencing
Telemailing
Telemeeting

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Computer Networking
Contention is

the condition when two or more stations attempt to use the same channel at the same time
None of these
a continuous frequency capable of being modulated or impressed with a second signal
One or more conductors that serve as a common connection for a related group of devices
a collection of interconnected functional units that provides a data communications service among stations attached to the network

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Computer Networking
What is the purpose of flow control?

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

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