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.

port scan

A method that hackers use to determine which computer’s ports are open to communication. It is done by sending messages to computer ports to locate points of vulnerability. Although it can be a precursor to an intrusion attempt, port scanning does not in itself provide access to a remote system. See also Portscan Checking.