Answer / syed

Central instance is the one where the message service and
the Enqueue serveice is found.
Application server is host for different services like
dialog, backgroup, update, spool.

Answer / s thotla

Enque server will be installed on the central
instace.Generally there will be only one enque server ,
which will be installed on the Central instace.

From transaction sm51 we can see Central instace and all
application servers. Only central instace will be having
the enque server.

Answer / purushotham

Application Server :

Applicati0on server provides runnable services to instance.It

has it's own memory and CPU and storage.

Central Instance :

In which where message server and enquee resides

Answer / devender

central instance contains the message service and R/3
services.
Application server contains the dispacher and workprocess

Answer / satheesh

Central instance having Message and Enqueue servers
also.But Applicatipon server is not having Message and
Enqueue workprocesses.

Answer / hameed

There is no diffrence between Application Server and
Centralinstance.

CI is nothing but a application server.

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