Answer / hash

A modern web-based enterprise application has three basic
layers.

1. Client layer which renders webpages (Browser)

2. Middle tier which includes: (WebServers ).

2.1 Presentation Layer which generates webpages, including
their dynamic content. It interprets webpages submitted
from the client. it knows which application to forward the
client-based request they usually made up of ASP, JSP

2.2 Business Logic Layer which enforces validations and
which handles interaction with the database, Visual Basic or
C++ apps are use in these servers mostly (The Web Server
can generally handle requests for several applications like
Microsoft IIS, Apache WebServer, IBM Websphere, etc are
example of webservers.)

3. Data layer which stores data between transactions

Answer / hema

On my application browser is tere.for example i want to request something.enter the URL in to browser.browser request to web server.If that is static request webserver can handil.if requests are dinamic webserver request to application server.then request goto dbserver.then request go to DB.DB give to respend to dbserver.dbserver toapplication server.application serverto webserver.webserver to browser wil give the response.

APPLICATION(browser) ............>webserver....>application server........>dbsever.......>DB.(this is request)then response REVERSE

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