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.

CIDR classless interdomain routing

A way of specifying a range of addresses using an arbitrary number of bits. For instance, a CIDR specification of would include any address in which the first 25 bits of the address matched the first 25 bits of