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      Protecting networks from security threats

      Lesson details

      Learning outcome

      I can compare threats to the security of a computer system and suggest protective actions to take.

      Key learning points

      1. Threats to security can be compared by likelihood and impact.
      2. Protective measures are used to make it difficult for attackers to achieve their goals.
      3. Combinations of protective measures make computer systems more secure.
      4. Training users of a network about risks can help keep a network secure.

      Keywords

      • Cybersecurity - the protection of computer systems from threats

      • Firewall - a system that filters network traffic to protect against unauthorised flows of data in or out of the network

      Common misconception

      Using security measures will stop every cyber attack.

      Security measures reduce the risk of cyber attacks but cannot stop all of them. New threats and advanced techniques can sometimes bypass even the best defenses.

      Teacher tip

      Analogies are a good way of helping pupils understand the way that technology operates. For example, a firewall could be likened to leaving doors of a house open or locked.

      Licence

      This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0
      except where otherwise stated. See Oak's terms & conditions
      (Collection 2).

      Lesson video

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      Prior knowledge starter quiz

      6 Questions

      Q1.
      What is the main risk of storing data electronically?

      It takes up physical space.
      It cannot be shared easily.
      Correct answer: It is vulnerable to theft.
      It is difficult to organise.

      Q2.
      What is the difference between data and information?

      Data is meaningful, whereas information is raw facts.
      Correct answer: Data is unprocessed, whereas information has structure or meaning.
      Data is always numeric, whereas information is always text.
      Data and information are the same.

      Q3.
      What is malware?

      Correct answer: software designed to gain access to a computer to cause problems
      software designed to protect computers
      a type of hardware used in networks
      a tool for improving system performance

      Q4.
      Which of the following is a type of malware?

      firewall
      Correct answer: trojan
      router
      antivirus

      Q5.
      Match the malware type to its description.

      Correct Answer:virus,spreads between computers and disrupts operations
      Correct Answer:worm,spreads through networks and slows them down
      Correct Answer:trojan,disguised as a harmless program

      Q6.
      What is the purpose of the Data Protection Act 2018?

      to protect computers from viruses
      to prevent online shopping fraud
      to monitor internet browsing habits
      Correct answer: to govern how personal data is collected, processed, stored and used

      6 Questions

      Q1.
      Match the concept to its description.

      Correct Answer:cybersecurity,the protection of computer systems from threats
      Correct Answer:firewall,security system that monitors and controls network communication
      Correct Answer:phishing,deceiving people to steal personal information

      Q2.
      Which of the following is an example of social engineering?

      installing antivirus software
      creating a secure password
      using a firewall to monitor a network
      Correct answer: sending a phishing email to trick someone into sharing personal information

      Q3.
      How does user training improve network security?

      It reduces the cost of cybersecurity measures.
      It eliminates all risks of cyber attacks.
      Correct answer: It helps users recognise and avoid potential threats.
      It improves the speed of the network.

      Q4.
      Why can’t security measures stop all cyber attacks?

      Correct answer: Attackers continuously develop new techniques.
      Security measures are too expensive.
      Most security measures are outdated.
      Security measures only work on specific devices.

      Q5.
      What is the main purpose of combining security measures?

      to make systems faster
      Correct answer: to reduce the risk of successful attacks
      to eliminate the need for user training
      to comply with legal requirements

      Q6.
      What is the impact of human error on data security?

      It has no significant impact.
      It only affects physical security.
      It makes networks slower.
      Correct answer: It is a major risk that attackers exploit.

      To help you plan your 9 computing lesson on: Protecting networks from security threats, download all teaching resources for free and adapt to suit your pupils' needs...