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IB Digital Society: Content: Networks and the internet
How networks work, access, security, governance. 2 subtopics, 10 key terms.
In this topic: 6.1 · 6.2
6.1How networks and the internet work
Key terms
- Network
- Connected devices sharing data.
- Internet
- A global network of networks using TCP/IP.
- Packet switching
- Data is split into packets sent independently and reassembled.
- IP address
- A numerical address identifying a device on a network.
- DNS
- Domain Name System: translates names (example.com) into IP addresses.
Physical layer: submarine cables carry most intercontinental data; mobile networks (4G, 5G); satellites.
The full notes, worked example and check questions for this subtopic are in the app.
Exam tip: Network effects are a powerful link between the content area “networks” and the concept “power”.
6.2Security, governance and access
Key terms
- Cybersecurity
- Protecting systems and data from attacks.
- Encryption
- Encoding data so only authorised parties can read it.
- Ransomware
- Malware that locks data until a ransom is paid.
- Net neutrality
- Treating all internet traffic equally.
- Internet shutdown
- A government cutting access to the internet or services.
Threats: phishing, ransomware (WannaCry, 2017, hit the UK's NHS), state-sponsored attacks, data breaches.
The full notes, worked example and check questions for this subtopic are in the app.
Exam tip: Use WannaCry or the Great Firewall as named, dated examples.
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