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 HTTPS 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.