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The Client layer. Web pages are represented by HTML, the HyperText Markup Language.The protocol to send and receive web pages from a web server is HTTP, the HyperText Transfer Protocol.What's useful to know about HTTP in this context?It was intended as a request
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1. Testing Web-based applications Typically, a multi-layered architecture is used. Three primary layers, typically on different hosts: Client: often uses a web browser, but could also be an client application sends requests for web pages receives response Database: stores persistent data such as item catalogues, transaction records, etc. Application server receives requests and constructs a web page response handles access control, session management, etc.