Cisco IPS 7.1 Installation Guide download pdf (Page 393)

Glossary

GL-15

Cisco Intrusion Prevention System Appliance Hardware Installation Guide for IPS 7.1

OL-24002-01

OIR

online insertion and removal. Feature that permits you to add, replace, or remove cards without

interrupting the system power, entering console commands, or causing other software or interfaces to

shutdown.

OPS

Outbreak Prevention Service.

P2P

Peer-to-Peer. P2P networks use nodes that can simultaneously function as both client and server for the

purpose of file sharing.

packet

Logical grouping of information that includes a header containing control information and (usually)

user data. Packets most often are used to refer to network layer units of data. The terms datagram,

frame, message, and segment also are used to describe logical information groupings at various layers

of the OSI reference model and in various technology circles.

PAgP

Port Aggregation Control Protocol. PAgP aids in the automatic creation of EtherChannel links by

exchanging PAgP packets between LAN ports. It is a Cisco-proprietary protocol.

PAM

Software module that provides AAA functionality to applications.

PAP

Password Authentication Protocol. Most commonly used RADIUS messaging protocol.

passive

fingerprinting

Act of determining the OS or services available on a system from passive observation of network

interactions.

Passive OS

Fingerprinting

The sensor determines host operating systems by inspecting characteristics of the packets exchanged

on the network.

PASV Port Spoof

An attempt to open connections through a firewall to a protected FTP server to a non-FTP port. This

happens when the firewall incorrectly interprets an FTP 227 passive command by opening an

unauthorized connection.

PAT

Port Address Translation. A more restricted translation scheme than NAT in which a single IP address

and different ports are used to represent the hosts of a network.

patch release

Release that addresses defects identified in the update (minor, major, or service pack) binaries after a

software release (service pack, minor, or major update) has been released.

PAWS

Protection Against Wrapped Sequence. Protection against wrapped sequence numbers in high

performance TCP networks. See RFC 1323.

PCI

Peripheral Component Interface. The most common peripheral expansion bus used on Intel-based

computers.

PDU

protocol data unit. OSI term for packet. See also BPDU and packet.

PEP

Cisco Product Evolution Program. PEP is the UDI information that consists of the PID, the VID, and

the SN of your sensor. PEP provides hardware version and serial number visibility through electronic

query, product labels, and shipping items.

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