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What are the advantages of 3-Tier or N-Tier ?

#1
3-Tier or Multi-Tier architectures force separation among presentation logic, business logic and database logic.

Let us look at some of the key benefits :

- Manageability : Each tier can be monitored, tuned and upgraded independently and different people can have clearly defined responsibilities.

- Scalability : More hardware can be added and allows clustering (i.e. horizontal scaling).

- Maintainability : Changes and upgrades can be performed without affecting other components.

- Availability : Clustering and load balancing can provide availability.

- Extensibility : Additional features can be easily added.
 
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