How does message switching operate, Computer Network Security

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Question:

Human telephone conversations are characterized by irregular pauses, alternating with irregular bursts of speech.

In contrast, communication via computers is characterized by relatively long pauses between short bursts of transmission.

i. How does message switching operate?

ii. Explain briefly the concept of circuit switching. Give an example of circuit switching.

iii. Why is circuit switching preferred over packet switching in voice communications?

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