JSDK (Java Servlet Development Kit) is a package containing all the classes and interfaces needed to develop servlets. JSDK also contains a web server and servlet engine to test your creations.

SIP Servlet Defined in Java Specification Request 116, the SIP Servlet Specification provides a container-servlet programming model for SIP applications.

Finally, I’ll touch on Servlet 3.0’s other enhancements such as pluggability and ease of configuration, leaving you with a good impression of Servlet 3.0 and its impact on Java Web development.