A-level Computing/AQA/Computer Components, The Stored Program Concept and the Internet/Structure of the Internet

The Internet and its Uses
  • Internet
  • World Wide Web (WWW) and routers.
  • Intranet

Understand the structure of the Internet, the role of packet switching

Understand the difference between the Internet, the Web and an intranet.

The Internet and its Uses

Uniform Resource Locator (URL)

Describe the term URL in the context of Internet working.

Uniform Resource Identifier (URI)

Describe the role of URIs in the context of Internet working.

Domain Names and IP Addresses

Explain the terms domain name and IP address.
Describe how domain names are organised.
Know that an IP address is split into a network identifier part and a host identifier part.
The Internet, Intranet and World Wide Web

Internet registries and Internet registrars

Explain why such services are provided.

Internet Service Providers (ISP)

Understand the role of an ISP.

Domain Name Server (DNS)

Understand the purpose of Domain Name Server.

The Client–Server Model

Be familiar with the client–server model.

Common Standard Protocols:

  • TCP/IP - Describe the role of the four layers of the TCP/IP protocol stack, including sockets.
  • FTP - FTP client software and an FTP server to transfer files using anonymous and non-anonymous access.
  • HTTP - Web server to retrieve web pages in text form
  • TELNET - Telnet server for remote management of a server
  • POP3, SMTP - E-mail server to read and send e-mail
  • Well-known ports
  • Client ports

Understand the role of a web browser in retrieving web pages and web page resources and rendering these accordingly.