title: What is Catalina.jar in Apache Tomcat Server ? How is it different from servlet-api.jar?
body: <p>I am trying to learn Servlet and Jsp(beginner). According to my tutor, there are two important jar files that tomcat server needs in order run our servlet web component. I want to know what are the work and difference between these two (catalina.jar and servlet-api.jar) jar files.</p>