In a 3-tier design, the client interacts with application software deployed on a separate server, and the application server interacts with a database that is located on another server. 1)“Chapter 19: Physical Tiers and Deployment.” Microsoft Application Architecture Guide, 2nd Edition. Microsoft, 1 Oct. 2009. Web. 28 Sept. 2015. <https://msdn.microsoft.com/en-us/library/ee658120.aspx>.

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