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.


Persistent malicious code modifies the system environment such that the malicious code is executed when the system boots up. For example, the malicious code may modify the autoexec.bat file under Windows, or the /etc/rc.* files under Unix.