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What is tier means
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Posted: 2006-01-28 05:06:00
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God bless Google.

http://www.google.com/search?[....]gion=0&rpp=20&timeout=5&hpe=10
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Posted: 2006-01-28 05:12:20
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Well, I'm not too good at explaining things, but i'll give it a go:

The tiers you are reffering to are used in Multi-Tier application's. These applications have many different layers of data abstaction (hence the term tier), the highest layer, would be the UI of the application, (Or the interface of the service), and the next lower layer would be only the components which interact with the highest layer, the next lower layer would contain the components which interact only with the 2nd layer, and so on and so forth.
Do you get it?

I told you I wasn't good at expalining stuff.




Edit: Ok, I whipped something up, to explain multi-tiers:

Imagine a simple calculator:



Now in a multitier implementation of this simple calculator, we would have this model:




Does this explain it to you a little better?

_________________
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[ This Message was edited by: Debu on 2006-01-28 07:19 ]
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Posted: 2006-01-28 07:49:04
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And i thought tier 1 mite mean like havin ui component of appl & 2nd mite be database conectd to it & 3rd mite data commn with the network.Like this ¿
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Posted: 2006-01-28 10:15:00
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in three tier architecture -
Tier 1 has the presentation logic ie. the user interface
Tier 2 has the business logic ie. the functions written in code
Tier 3 usually represents the database ie. the backend but tier 3's definition might vary from organisation to organisation.

so tier basically represents a level of abstraction for an application.
_________________
If you keep your feet firmly on the ground, you'll have trouble putting on your pants.

[ This Message was edited by: k4m!k4ze on 2006-01-28 10:53 ]
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Posted: 2006-01-28 11:51:42
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Wat bout rss feed reader project ,is it a 2 tier or 3 tier application
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Posted: 2006-01-28 15:48:00
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The Esato Reader Project is a 3 Tier application.
1. The first tier is the UI.
2. The 2nd Tier is the business logic (i.e The classes for the reader and the code to impliment them)
3. The 3rd tier is the web data, (i.e the RSS XML data from the internet)

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Posted: 2006-01-28 16:40:48
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