Cisco IPS 7.1 Installation Guide download pdf (Page 402)

Glossary

GL-24

Cisco Intrusion Prevention System Appliance Hardware Installation Guide for IPS 7.1

OL-24002-01

virus

Hidden, self-replicating section of computer software, usually malicious logic, that propagates by

infecting—that is, inserting a copy of itself into and becoming part of—another program. A virus

cannot run by itself; it requires that its host program be run to make the virus active.

VLAN

Virtual Local Area Network. Group of devices on one or more LANs that are configured (using

management software) so that they can communicate as if they were attached to the same wire, when

in fact they are located on a number of different LAN segments. Because VLANs are based on logical

instead of physical connections, they are extremely flexible.

VTP

VLAN Trunking Protocol. Cisco Layer 2 messaging protocol that manages the addition, deletion, and

renaming of VLANs on a network-wide basis.

VMS

CiscoWorks VPN/Security Management Solution. A suite of network security applications that

combines web-based tools for configuring, monitoring, and troubleshooting enterprise VPN, firewalls,

network intrusion detection systems and host-based intrusion prevention systems.

VoIP

Voice over IP. The capability to carry normal telephony-style voice over an IP-based Internet with

POTS-like functionality, reliability, and voice quality. VoIP enables a router to carry voice traffic (for

example, telephone calls and faxes) over an IP network. In VoIP, the DSP segments the voice signal into

frames, which then are coupled in groups of two and stored in voice packets. These voice packets are

transported using IP in compliance with ITU-T specification H.323.

VPN

Virtual Private Network(ing). Enables IP traffic to travel securely over a public TCP/IP network by

encrypting all traffic from one network to another. A VPN uses “tunneling” to encrypt all information

at the IP level.

VTP

VLAN Trunking Protocol. A Cisco Layer 2 messaging protocol that manages the addition, deletion,

and renaming of VLANs on a network-wide basis.

vulnerability

One or more attributes of a computer or a network that permit a subject to initiate patterns of misuse

on that computer or network.

WAN

wide-area network. Data communications network that serves users across a broad geographic area and

often uses transmission devices provided by common carriers. Frame Relay, SMDS, and X.25 are

examples of WANs.

watch list rating

WLR. A weight associated with the CSA MC watch list in the range of 0 to 100 (CSA MC only uses

the range 0 to 35).

Web Server

A component of the IPS. Waits for remote HTTP client requests and calls the appropriate servlet

application.

WHOIS

A TCP-based query/response protocol used for querying an official database to determine the owner of

a domain name or an IP address.

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