AQA A Level · Computer Science 7517

Communication: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Communication.

10 questions21 marksFree, no account

Question 1

1 mark

What is the primary purpose of a start bit in asynchronous data transmission?

Question 2

1 mark

A communication link has a baud rate of \( 4800 \) baud. If each signal change represents \( 3 \) bits, what is the bit rate of this link?

Question 3

1 mark

Define latency in the context of network communication.

Question 4

1 mark

Which of the following best defines baud rate in the context of data transmission?

Question 5

1 mark

A network designer decides to use WPA2 (WiFi Protected Access 2) for a new corporate office. What security feature does WPA2 primarily provide?

Question 6

2 marks

In the context of networking, define the term latency.

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Question 7

3 marks

Calculate the bit rate of a communication channel that has a baud rate of 2400 and encodes 3 bits per signal change.

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Question 8

5 marks

In an asynchronous serial transmission, explain the function of start and stop bits and how they allow the receiver to process data correctly.

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Question 9

3 marks

Explain the difference between serial and parallel data transmission. Provide one reason why serial transmission is typically preferred over parallel for long-distance communication.

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Question 10

3 marks

A digital communication system is configured with a baud rate of 4800. If each signal change encodes 3 bits of data, calculate the bit rate of the system. Explain the relationship between bit rate and baud rate in this context.

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