Explain models of Web Application Components.

Sure! Here’s a detailed explanation of the models of web application components, specifically in the context of Web Application Testing and Audit.  

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Web applications are structured using various components that interact to deliver functionalities to users. Understanding these components and their models is crucial for testing and auditing security, functionality, and performance. Different models define how these components are structured and interact within a web application.

## 1. Client-Server Model
The client-server model is the fundamental architecture of web applications. It consists of two main components:  

### Client-Side (Frontend)
- The client-side is responsible for rendering the user interface and interacting with the user.
- It includes HTML, CSS, and JavaScript, along with frameworks like React, Angular, or Vue.js.
- The client makes HTTP requests to the server and processes responses.
- Web browsers act as clients in most web applications.
- Testing Perspective:  
  - UI/UX testing to ensure consistency and responsiveness.  
  - Security testing for vulnerabilities like XSS (Cross-Site Scripting).  
  - Performance testing to check for rendering speed ________ _________ ________ ____ _______ __________ __________ _________ _______ ________ _____.
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