In web development, communication happens between two main parts called client and server.
Understanding this concept is very important before working with AJAX.
The client is the user's browser.
It sends requests when a user clicks a button, submits a form, or opens a page.
The server is responsible for processing requests.
It performs operations such as data validation, database access, and business logic.
When the server finishes processing, it sends a response back to the client.
The response may contain text, JSON data, or HTML content.
AJAX acts as a bridge between client and server.
It allows communication to happen without reloading the page.
This client–server communication cycle continues every time data is exchanged in a web application.
After completing this lesson, you should clearly understand how browsers and servers communicate using AJAX.