Http Request and Http Response

 Differences between Servlet and CGI

Servlet	CGI
In    Servlets      each      request       is    handled       by lightweight Java Thread(Multi threaded)	In CGI each request is handled by heavy weight OS process.
Servlets are Platform Independent.	CGI is not Platform Independent.
Servlets are portable.	CGI is not portable.
Servlets can link directly to the Web server	CGI cannot directly link to Web server.
Servlets can handle cookies	CGI cannot handle cookies
Servlets can track sessions	CGI cannot track sessions
Servlets are inexpensive than CGI	CGI is more expensive than Servlets
Servlets are more secure than CGI	CGI programs can be more vulnerable to attacks than Servlets