What is the difference between N-layer and N-tier architecture?
|All the layers may reside on the same physical computers(server) while the components in different layers communicate via well-defined interfaces.||In this type of architecture, there are at least three separate logical parts, each located on a different physical server.|
|Communication between layers is explicit and loosely coupled.||In this, communication between the tiers is asynchronous to support scalability.|
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