| N-Tier Design |
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| u | An
n-tier design is any set of components |
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| communicating
via well-defined interfaces |
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| u | Classic
monolithic coding is single (really |
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| zero)
tier |
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| u | Client-server
is two-tier |
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| u | Web
apps are often three (interface |
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| management
« business logic « data mgmt |
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| u | Programming
to interface is difficult but more |
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| flexible,
scalable and powerful |
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