Definition
A web application is software accessed through a web browser over a network, typically the internet. It consists of a frontend user interface displayed in the browser and a backend that handles data processing, logic, and database interactions. Users interact with the frontend, which sends requests to the backend for information or actions, and the backend responds, updating the frontend accordingly. Understanding web applications is crucial for IT professionals to manage security vulnerabilities, ensure system performance, and facilitate effective user experiences. For instance, online banking portals and e-commerce sites are common web applications that manage sensitive transactions and customer data. Unlike desktop applications installed directly on a device, web applications do not require local installation and can be accessed from any internet-connected device. This concept is fundamental in domains like CompTIA Security+, CySA+, and AWS Certified Solutions Architect Associate.