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I would like to know what is the best technology to develop a Delphi 7 multi- tier application...I've heard that Data Snap components(DCOM, WebConnection etc) are no longer the best choice because the troubles with firewalls...Please I'd apprecciate any suggestions and &nbsp;information on the ultimate technologies used for this. 
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I would like to know what is the best technology to develop a Delphi 7 multi- tier application...I've heard that Data Snap components(DCOM, WebConnection etc) are no longer the best choice because the troubles with firewalls...Please I'd apprecciate any suggestions and  information on the ultimate technologies used for this. 

What is the ultimate tecnnology for developing multi-tier apps. in Delphi7?

Programming theory deals with the design, implementation, analysis, characterization, and classification of programming languages and their individual features, along with introductory programming concepts like program structure, variable declaration and conditional and looping constructs. Sub-disciplines include the formal semantics of programming languages, type theory, program analysis and transformation, comparative programming language analysis, metaprogramming, domain-specific languages, compiler construction and run-time systems.