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DNS
DNS maps domain names to records including addresses.
Class 6 · English Medium · Pearson Edexcel · ICT
Networks, internet and digital safety
Explain a network request and choose practical privacy protections.
Shared cross-level core and stretch unit. Start with the core questions, then use the stretch example for deeper work. The same unit is available in related class and board pathways; it is not a full grade-specific or examination-specification course. A teacher should select the appropriate depth and further topics.
Learn the idea
A network links devices using communication rules called protocols. A domain name can be resolved to a network address before a connection is made. Encryption protects data in transit, but it does not prove a website’s claims are honest or prevent the recipient from misusing data after receiving it.
Worked example
A browser requesting a learning page may resolve its domain, establish a secure connection and send an HTTP request. A padlock indicates a protected connection to that domain, not an endorsement of its content.
- Identify sender, recipient and data.
- Explain the role of the protocol.
- Share only data needed for the task.
Stretch example
A threat model names assets, possible attackers and likely paths. Separating authentication (who you are) from authorisation (what you may do) helps prevent a signed-in user accessing someone else’s records.
Your written practice
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no
Connection encryption is not merchant verification.
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no
Use a trusted route to check the request rather than disclosing credentials.
Write in your own words. A guardian or teacher should review this response.
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It requires another factor beyond the password, reducing harm from some stolen-password attacks.
Avoid claiming protection from every attack.
Write in your own words. A guardian or teacher should review this response.
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Ask the responsible guardian, consider the child’s privacy and the audience, and avoid unnecessary identifying details.
Include consent and data minimisation.
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authorisation
Authorisation determines access rights.
Write in your own words. A guardian or teacher should review this response.
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It may be copied or leaked; the server must verify the requester’s permission for each private record.
Describe a server-side check without exposing real records.
Privacy checklist
Map the minimum data needed for a fictional homework service.
Review with a guardian or teacher
- Name who needs each field.
- Keep secrets out of examples.
- Explain one server-side access rule.
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