Explain the advantages and disadvantages of multi-tier architectures when examined under the following topics: scalability, maintainability, reliability, availability, extensibility, performance, manageability, and security.


A J2EE platform (and application) is a multitiered system, we view the system in terms of tiers. A tier is a logical partition of the separation of concerns in the system. Each tier is assigned its unique responsibility in the system. We view each tier as logically separated from one another. Each tier is loosely coupled with the adjacent tier. We represent the whole system as a stack of tiers:

Multitiered System Software Architecture

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