Modules in Web Layer of Spring framework are:

Web module: This provides basic web-oriented integration features.

Servlet module: Support for Servlet Listeners.

WebSocket module: Support for Web Socket style messaging.

Portlet module: MVC implementation for Portlet environment

https://docs.spring.io/spring-framework/docs/3.0.0.M3/reference/html/ch01s02.html#:~:text=The%20Web%20layer%20consists%20of,Servlet%20and%20Web%2DPortlet%20modules.