..
>....so could you please suggest me whether should i go for 2 tier
>architecture or 3 tier architecture.
Whichever best suits the design you come up with.
>what r the advantages and disadvantages of these?
<http://www.google.com/search?q=%222+tier%22+%223+tier%22+architecture+advantage
Note also that to help the reader, it is best to
put an upper case letter at the start of each
sentence. To keep them reading, it also helps
to spell words like 'are' fully, rather than using
the SMS style abbreviations.

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Andrew Thompson
http://www.athompson.info/andrew/