servlets

how many types of servlets are there
vinesh_indiaAsked:
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yogeshrCommented:
The basic types of servlets are core servlets, local servlets, signed network servlets, and unsigned network servlets. These servlets are treated differently with respect to security.

The core servlets and local servlets are thought to be trusted and are granted full access to the server's resources. Signed network servlets are granted a limited subset of privileges, as determined by the site administrator. Unsigned servlets are not trusted and are only executed in a restrictive environment, called the server sandbox.



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rjackmanCommented:
Strickly speaking there is only 1 servlet: Generic servlet but
there is another servlet calledHttpServlet which is based on generic servlet and having some additional functionality
if ur servlet is protocol independent then u  have to inherit from generic servlet where as ig=f u wat to have http properties to ur servlet then u have to inherit from the HttpServlet
RJackman
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vinesh_indiaAuthor Commented:
what is an internal servlet
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yogeshrCommented:
These are addon servlets that you can add to your application to enable optional functions for that application. e.g : -Application Server Version 3 provides internal (built-in) servlets.
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yogeshrCommented:
For additinal information about the internal servlets you can use the link
http://www-4.ibm.com/software/webservers/appserv/doc/v30/se/web/doc/whatis/icsrvlet.html#internalsrv
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vinesh_indiaAuthor Commented:
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