Hello Sir,

When I was reading Professional Java Server Programming
on the page 578 is given that .
In system portability they have said.
Web servers means that a developer needs to abstract the underlying system
platform as much as possible.There is no
web development without an abstracted system platform.To some extent the
best effort in this direction , for a while
, has been the Apache server, which exists on virtually every platform.

What is meaning of abstract the underlying system platform?

In this regard how application servers helps us?

They have also said moving to higher abstraction of undrlying system platform
is acheived by Application server.

If anyone knows please explain Sir.

Thanks
Murigesh Channur