COM is a local component object model on one single machine.
DCOM is a distributed component object model working across several machines.
DCOM = COM + "Secure" Networking Transactions.
three main elements added to COM:
The way for creating a remote object.
The way for accessing a remote object.
The way to ensure secure access to a remote object.
COM is collection of tools which are executed on client
side environment whereas DCOM is a Distributed component
object Model runs at the given server.
Rajeshk, if this helps please login to Mark As Answer. | Alert Moderator