Few facts in J2EE world

  • A Web Server is supposed to support HTTP and/or FTP, SSL HTTPS, etc protocols..Doesnt have to do anything with Java.
  • An Application Server is an extension of WebServer, which basically should support all the technologies in J2EE spec (JavaServlets, JSP, JMS ...)
  • WebLogic, Websphere are commercial (proprietary) JEE Application Servers whereas JBoss and GlassFish are open source JEE Application Server.
  • Catalina is a term used for Tomcat. Unless you're talking about the nitty-gritty details, just call it Tomcat.
  • Tomcat is a Web Server cum Servlet Container which can work as a container for Servlets and JSPs. Being a Servlet Container Tomcat does not provide certain JEE enterprise features like EJB, Messaging etc.

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