Cisco IPS 7.1 Installation Manual page 441

O
online insertion and removal. Feature that permits you to add, replace, or remove cards without
OIR
interrupting the system power, entering console commands, or causing other software or interfaces to
shutdown.
Outbreak Prevention Service.
OPS
P
Peer-to-Peer. P2P networks use nodes that can simultaneously function as both client and server for the
P2P
purpose of file sharing.
Logical grouping of information that includes a header containing control information and (usually)
packet
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.
Port Aggregation Control Protocol. PAgP aids in the automatic creation of EtherChannel links by
PAgP
exchanging PAgP packets between LAN ports. It is a Cisco-proprietary protocol.
Software module that provides AAA functionality to applications.
PAM
Password Authentication Protocol. Most commonly used RADIUS messaging protocol.
PAP
Act of determining the OS or services available on a system from passive observation of network
passive
fingerprinting interactions.
The sensor determines host operating systems by inspecting characteristics of the packets exchanged
Passive OS
Fingerprinting on the network.
An attempt to open connections through a firewall to a protected FTP server to a non-FTP port. This
PASV Port Spoof
happens when the firewall incorrectly interprets an FTP 227 passive command by opening an
unauthorized connection.
Port Address Translation. A more restricted translation scheme than NAT in which a single IP address
PAT
and different ports are used to represent the hosts of a network.
Release that addresses defects identified in the update (minor, major, or service pack) binaries after a
patch release
software release (service pack, minor, or major update) has been released.
Protection Against Wrapped Sequence. Protection against wrapped sequence numbers in high
PAWS
performance TCP networks. See
Peripheral Component Interface. The most common peripheral expansion bus used on Intel-based
PCI
computers.
protocol data unit. OSI term for packet. See also BPDU and packet.
PDU
Cisco Product Evolution Program. PEP is the UDI information that consists of the PID, the VID, and
PEP
the SN of your sensor. PEP provides hardware version and serial number visibility through electronic
query, product labels, and shipping items.
OL-24002-01
RFC 1323.
Cisco Intrusion Prevention System Appliance and Module Installation Guide for IPS 7.1
Glossary
GL-15