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what is advantage of 4-tire architect compared to 3-tire architect?
Updated 14-Mar-14 20:42pm

I've always found 4 tires much more stable than 3 tires. :)
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ARBebopKid 3-Jan-12 13:40pm    
my 5
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3 tier architecture has client, application server and db server components. In 4 tier architecture, you can add web service layer between client and app server through web server.

Major advantage is SOA (Service Oriented Architecture) in 4 tier system.
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I suppose you may find a lot of useful info just Googling[^] for.
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