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What is the difference between COM and DCOM?
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Answer Posted / vikas
COM objects require installation on the machine from where
it is being used and DCOM requires installation somewhere on
the same network.
Any COM object may participate in DCOM transactions. DCOM
introduced several improvements/optimizations for
distributed environment, such as MULTI_QI (multiple
QueryInterface()), security contexts etc.
DCOM demonstrated importance of surrogate process (you
cannot run in-proc server on a remote machine. You need a
surrogate process to do that.)
DCOM introduced a load balancing.
The fact is dotnet has not replace the COM/DCOM instead it
has extended the functionality by introducing new featurs to it.
While dot-NET software can utilize COM components, and COM
components can tie into many features of the Dot-NET
environment, the two technologies are internally separate.
In particular, Dot-NET has been designed to work across the
Internet, with firewalls and wide-area networks, whereas
DCOM was designed primarily for use on local-area networks.
| Is This Answer Correct ? | 16 Yes | 6 No |
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