Tuesday 25 September 2012
What is the difference between layers and tiers?
Layers are a logical grouping of functionality and components. Tiers describe physical distribution of the functionality and components on separate servers, computers, networks or remote locations. They use the same names (presentation, business, services, data) but only tiers imply a physical separation. It is common to locate more than one layer on the same physical machine.
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Group of logical called Layers, one layer or more than one layers physically deployed in different environment called Tiers
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