三层之间的区别与n层 [英] Difference between three tier vs. n-tier

问题描述

我只是碰到下面的句子来了：

I just came across the following sentence:

随着行业已经从一个三迁
  三层模型n层模型，对象关系型阻抗失配变得更为prevalent。

As the industry has moved from a three tier model to n-tier models, the object relational impedance mismatch has become more prevalent.

但我不能找到三层和n层之间的差异的简要说明。我知道三层是什么，我假设n层只是增加了一个或多个层次。我只是不知道这些额外的层会是什么。如果任何人有一个简短的说明或只是一个很好的链接，这将是多AP preciated。

But I can't find a concise explanation of the difference between three tier and n-tier. I know what three tier is, and I assume n-tier just adds one or more tiers. I'm just not sure what these additional tiers would be. If anyone has a short explanation or simply a good link, that would be much appreciated.

推荐答案

的报价似乎是从这个的 $ C $的CProject 页面。这似乎也解释做n层到包括像Web服务，JavaScript中，工作流程等。所有的事情，3层模型并不一定有。

The quote appears to be from this codeproject page. It also seems to do a pretty good job of explaining n-tier to include things like web services, javascript, workflows, etc. All things that 3-tier models don't necessarily include.

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