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GCSE Computer Science/Paper 1/Networks and topologies

DNS (Domain Name Server), Hosting, The Cloud, Web servers and clients

The Internet as a worldwide collection of computer networks: DNS (Domain Name Server), Hosting, The Cloud, Web servers and clients

1.3.1 Networks and topologies

Practise exam questions

Networks and topologies — Note 5 of 10

What you need to know

The Internet is a global network of interconnected computer networks. Key concepts include DNS, hosting, the cloud, and the client-server model used by web servers and clients.

What to know

  • The Internet uses the client-server model: web servers store and provide web pages; clients (browsers) request and display them.
  • Key Internet services include DNS (translates URLs to IP addresses), web hosting (storing websites on servers), and cloud computing.

Key terms

The Internet

A worldwide network of smaller computer networks, allowing devices around the world to communicate and share data.

Exam technique

  • Tip:The Internet is a NETWORK OF NETWORKS — it is not just 'the web'. The World Wide Web is a service that runs ON the Internet.
  • Tip:IPv4 addresses use groups between 0 and 255, separated by FULL STOPS (dots). NOT colons, NOT hyphens. 256 is too high.
  • Example:Fill-in: 'A website is hosted on a WEB SERVER. Computers accessing it are CLIENTS. The user enters a URL into a browser, which queries the DNS for the matching IP address.'

Ready to test yourself?

Practise 1.3.1 questions
← Previous noteWireless access points, Routers, Switches, NIC (Network Interface Controller/Card), Transmission media1.3.1 Networks and topologiesNext note →DNS (Domain Name Server)1.3.1 Networks and topologies

Back to Networks and topologies

Revise another OCR GCSE topic: Wired and wireless networks, protocols and layers

Networks and topologies

Note 5 of 10

  1. 1LAN (Local Area Network), WAN (Wide Area Network)
  2. 2Factors that affect the performance of networks
  3. 3The different roles of computers in a client-server and a peer-to peer network
  4. 4Wireless access points, Routers, Switches, NIC (Network Interface Controller/Card), Transmission media
  5. 5DNS (Domain Name Server), Hosting, The Cloud, Web servers and clients
  6. 6DNS (Domain Name Server)
  7. 7Hosting
  8. 8The cloud
  9. 9Web servers and clients
  10. 10Star and Mesh network topologies
Topic overview

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