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Web layer

concernedwith presenting the user interface and the behavior of the application

While the web layer can also contain logic, core application logic isusually located in the services layer

Three Layers within the Web Layer

-HTML-The Content Layer


-CSS - the Styles Layer


-JavaScript - the Behavior Layer

DOM

Document Object Model

benefits of separating thelayers

- Shared resources


- Faster downloads


- Multi-person teams


- Accessibility


- Backwards compatibility

HTTP

- HTTP is connectionless


- HTTP is media independent


- HTTP is stateless