The glossary below contains many of the terms you will find in common use throughout the Symantec Security Response website. Please refer to this list to find definitions of terms and answers to other Internet security-related questions.

DCM Data Change Map

An object containing a bitmap that can be optionally associated with a data volume on the Primary RVG. The bits represent regions of data that are different between the Primary and the Secondary. The bitmap is used during synchronization and resynchronization.