Client-Server Model

World Wide Web service

The web is based on the client-server model. Users run web browsers, to access information on web servers. Web servers "serve up" information and services.

clients make requests; servers give responses
  1. The client (user) makes a request for some information or service and sends it to the server.

  2. The server cranks away to provide that information or service and returns it the client.

  3. The client does some processing of its own, such as formatting the results returned from the server.

Internet Standard Components

  1. A client-server model in which the server can collect information from clients, execute scripts, and download applications to run on the client's computer.

  2. TCP/IP for all communication between nodes.

  3. A common naming scheme for all hosts (Domain Naming System, or DNS), and a method for specifying exactly which host and documents you want to access (Universal Resource Locator, or URL).

  4. A common format, Hyper-Text Markup Language, or HTML, to create documents and to create hyperlinks among these documents.

  5. A standard protocol, Hyper-Text Transfer Protocol, or HTTP , which defines rules for accessing and transferring information between clients and servers.

The HTTP Link Process
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