"Alfredo Novoa" <alfredo_at_nospam_ncs.es> wrote in message news:3da88466.510794_at_news.wanadoo.es...
>
> The 3 tiers are at implementation level not at logical level.
>
> Logically there are still 2 tiers: client applications and the DBMS,
> but the logical DBMS has 2 physical tiers: the middleware and the
> SQL-DBMS.
I agree, but I would go further. I would say that, logically, there is
only one tier. The fact that the application the user is running is
distributed, and uses a DBMS, is implementation-specific.
Marshall
Received on Mon Oct 14 2002 - 01:18:47 CDT
