Cyber Security — A-Level Computer Science Revision
Revise Cyber Security for A-Level Computer Science. Step-by-step explanation, worked examples, common mistakes and exam-style practice aligned to AQA, Edexcel and OCR.
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- Cyber Security in A-Level Computer Science: explanation, examples, and practice links on this page.
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Go to Network Topologies & ProtocolsWhat is Cyber Security?
Cyber security is the practice of protecting computer systems and networks from unauthorized access, use, disclosure, disruption, modification, or destruction. It involves a wide range of technologies, processes, and practices designed to protect networks, devices, programs, and data from attack, damage, or unauthorized access.
Board notes: A major topic for AQA, Edexcel, and OCR. Students should be able to describe different types of cyber threats and explain how to protect against them.
Step-by-step explanationWorked example
Phishing is a type of social engineering attack where an attacker sends a fraudulent email that appears to be from a legitimate source. The email may contain a link to a fake website that is designed to steal the user's login credentials or financial information. To protect against phishing, users should be wary of unsolicited emails and should never click on links or download attachments from unknown sources.
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Common mistakes
- 1Thinking that cyber security is only about technology.
- 2Not understanding the different types of cyber threats, such as malware, phishing, and denial-of-service attacks.
- 3Believing that they are not a target for cyber attacks.
Cyber Security exam questions
Exam-style questions for Cyber Security with mark-scheme style solutions and timing practice. Aligned to AQA, Edexcel and OCR specifications.
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Step-by-step method
Step-by-step explanation
4 steps · Worked method for Cyber Security
Core concept
Cyber security is the practice of protecting computer systems and networks from unauthorized access, use, disclosure, disruption, modification, or destruction. It involves a wide range of technologies…
Frequently asked questions
What is the difference between a virus and a worm?
A virus is a type of malware that attaches itself to a program or file and then spreads to other computers. A worm is a type of malware that can replicate itself and spread to other computers without any human interaction.
What is encryption?
Encryption is the process of converting data into a code to prevent unauthorized access. It is used to protect sensitive data, such as credit card numbers and passwords, when it is transmitted over a network.