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Knowledge organisers / Networks and topologies

The Internet: Web servers and clients

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Knowledge organiser

Networks and topologies

1.3.1e.iv

What you need to know

Web servers store and provide web pages to clients over the Internet. A client (such as a web browser) sends a request to the server, which responds by sending back the requested data. This is an example of the client-server model.

Key points

  • Definition:Web Server: a computer that stores web pages and sends them to clients when requested.
  • Definition:Client: a device or program (e.g. a web browser) that sends requests to a server and receives responses.
  • The client-server model: the client sends a REQUEST to the server; the server processes it and sends a RESPONSE.
  • File servers are another example — they allow clients to store and retrieve files centrally.
  • Exam Tip:Always describe the TWO-WAY process: client sends request, server sends response.