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64

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2

What is the difference between COM and DCOM ?

+3  A: 

DCOM stands for "Distributed COM". That means the client and server can be on different machines communicating across the network, instead of both being on the same machine as in conventional COM.

Jerry Coffin
+1, Also DCOM allows using a COM DLL on the same machine in a surrogate process with very little effort. Good for 32-bit/64-bit interop.
sharptooth
+2  A: 

DCOM=Distributed Component Object Model, you might call it COM via RPC. DCOM – Wikipedia

Loxley
Nah, RPC is used in same-machine out-of-process COM as well.
Hans Passant