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We describe the implications of a modern multi-tier Enterprise system where a server does not just get web pages but is a general host of services which are linked together to solve complex problems
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These servers can respect any of the 4 distributed object models CORBA, Java/RMI, COM or W3C's XLM WOM/DOM
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We illustrate these ideas with an analysis of a multi-protocol server JWORB -- written in Java but serving all protocols
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We point out how a multi-tier architecture allows you to build backend systems to increase performance when necessary
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