Figure : architectural diagram with most popular technologies used 

Web architecture basically focuses on how web application is internally built regarding its web client and the web server with all the other supporting services and components.

Currently there are many technologies being used in different components of web architecture.Different kind of technologies have their inherent advantages as well as draw backs. So when a web developer is selecting the most matching technology for his web application he needs to first go through and find what is his requirement and which one is more serving to his this requirement.