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On the Server in which the Web Application is deployed. For Ex: Tomcat, weblogic, websphere are all some servers in which a servlet can execute
Both are brand names of Software products made by their respective manufacturers i.e. IBM and BEA, however people generally refer to their Application Servers written in compliance with the J2EE specifications maintained by SUN. In that sense both are similar products and work on Java. However there may be differences between both in the way they are implemented and the J2EE features that they offer as well as additional value adds. Those would be too much to list here and suggest that you visit the respective sites of the Vendors. (These are not just application servers actually but entire suite of products, but generally people mean 'Application Servers')
Servlets can be run on Web servers like weblogic or websphere or tomcat. The servlet and other components of the j2ee project need to be packaged as an EAR and then deployed on the server. Based on the deployment descriptor we can access the servlet.
The Servlet file and all other components of the web/j2ee project get deployed onto a web server (Websphere, Weblogic, Tomcat etc) They are packaged into an Enterprise Archive file (EAR) and deployed on the server
WebSphere process server WebSphere sMash WebSphere Adapters All of the above
WebLogic - company - was created in 1995.
The J2EE application server is the server in which the j2ee application would run. Without the server a j2ee application cannot run. Some famous j2ee application servers are: a. Websphere b. Weblogic c. Tomcat d. etc
WebSphere process server WebSphere sMash WebSphere Adapters All of the above
WebSphere Portal was created in 2001.
WebLogic is an enterprise java application server. For more information on WebLogic, you can read about it at Oracle's website here: http://www.oracle.com/appserver/weblogic/standard-edition.html Owned by Oracle Corporation, Oracle WebLogic consists of a J2EE platform product family that includes: • a J2EE application server, WebLogic Application Server • an enterprise portal, WebLogic Portal • an Enterprise Application Integration platform • a transaction server and infrastructure, WebLogic Tuxedo • a telecommunication platform, WebLogic Communication Platform • an HTTP web server
The WebSphere Process Server is produced by IBM. WebSphere Process Server is a run time engine used by businesses. The WebSphere Process Server was released in June of 2012.
WebSphere is IBM's application software platform. WebSphere includes servers and tools that are needed to create, run and monitor web applications and product solutions.