Networking – Section 5

21. A batch processing terminal would not include a

A. CPU
B. card reader
C. card punch
D. line printer
E. None of the above

Correct Answer: A. CPU

22. Packet Switch Stream (PSS) was introduced in

A. the US in 1961 (&) the UK in 1981
B. the UK in 1980
C. the US in 1961
D. None of the above

Correct Answer: B. the UK in 1980

23. The physical layer of a network

A. defines the electrical characteristics of signals passed between the computer and communication devices
B. controls error detection and correction
C. constructs packets of data and sends them across the network
D. All of the above
E. None of the above

Correct Answer: A. defines the electrical characteristics of signals passed between the computer and communication devices

24. Which of the following allows devices on one network to communicate with devices on another network?

A. multiplexer
B. gateway
C. t-switch
D. modern
E. None of the above

Correct Answer: B. gateway

25. An error detecting code is which code is the remainder resulting from dividing the bits to be checked by a predetermined binary number, is known as

A. Cyclic redundancy check
B. Checksum
C. Error detecting code
D. Error rate
E. None of the above

Correct Answer: A. Cyclic redundancy check

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