Multi-Tier Application

What Does Multi-Tier Application Mean?

A multi-tier application is any application developed and distributed among more than one layer. It logically separates the different application-specific, operational layers. The number of layers varies by business and application requirements, but three-tier is the most commonly used architecture.
Any application that depends on or uses a middleware application is known as a multi-tier application.
A multi-tier application is also known as a multitiered application or n-tier application.

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Techopedia Explains Multi-Tier Application

A multi-tier application is used to divide an enterprise application into two or more components that may be separately developed and executed.

In general, the tiers in a multi-tier application include the following:

Presentation tier: Provides basic user interface and application access services
Application processing tier: Possesses the core business or application logic
Data access tier: Provides the mechanism used to access and process data
Data tier: Holds and manages data that is at rest This division allows each component/tier to be separately developed, tested, executed and reused.

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Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.