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Table Of Contents  CertiGuide to Security+
 9  Glossary

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IDS (Intrusion Detection System)

IDS comes in two forms: host based and network based. They can be passive or active in nature. They are designed to detect suspicious activity on a system,289483,sid14_gci850706,00.html

IETF (Internet Engineering Task Force)

An open group creating standards to evolve the Internet

Illicit server

A program designed to gain unauthorized access and control by bypassing standard authentication procedures. NetBus is an example (Postscript file, Section 9.1.4)

Incremental Backup

A backup of all files changed since the last full or archival backup

IM (Instant Messaging)

A process in which people can communicate without the delay of email. File attachments and lack of encryption can be security issues

IRT (Incident Response Team)

A group of people who respond to a security breech according to policy


A network connecting other networks. AKA Internetwork


An internal network that utilizes the same protocols as the Internet

IP spoofing

Unauthorized access to a system created by modifying the IP information in the source portion of an IP datagram

IPSec (IP Security Protocol)

A set of standards (protocols) to support secure communication in the IP layer (Network layer)

Issuing Authority (IA)

The part of a Certificate Authority that issues, suspends or revokes a certificate,289893,sid9_gci211947,00.html

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CertiGuide for Security+ ( on
Version 1.0 - Version Date: November 15, 2004

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