Chapter 23: Networks and Web Technologies: Network Security and Threats

A-level Computer ScienceOCR6 topicsHigher

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Data Representation: Numbers Long-Answer Questions

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4 questions24 marks36 min

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6 marksdescribestandardOCR A

CS23-1 binary numbers: describe how two's complement and binary addition operates in storing signed mark adjustments in eight bits, using precise OCR H446 terminology.

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6 marksexplainstandardOCR A

CS23-2 applied case: explain why two's complement and binary addition would affect storing signed mark adjustments in eight bits, including one limitation or trade-off.

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6 markswritehardOCR A

CS23-3 task for binary numbers: write a response using two's complement and binary addition in storing signed mark adjustments in eight bits; produce the correct denary conversion.

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CS23-4 synoptic judgement: evaluate the suitability of two's complement and binary addition for storing signed mark adjustments in eight bits, comparing it with one credible alternative.

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22. Networks and Web Technologies: Internet Communication

24. Networks and Web Technologies: HTML and CSS

Key learning objectives

Understand the key principles behind Networks and Web Technologies: Network Security and Threats.
Apply these ideas to exam-style questions.
Recall the essential definitions and key terms.