Hello Huynh Tin, best take a look at http://java.sun.com/events/jbe/98/features/appservers.html. IMHO it is a good introduction. Ciao Thomas You wrote: >Hi All, >I'm sorry for my basic question. >I don't know what is different between WebServer and WebApplication >Server. >Could anyone help me to answer or let me know any document about >this >problem. > > Thank you ! > Best regards ! > Huynh Tin