Motorola Netopia 7000, Administrator'S Handbook

Page: 338 / 368

Administrator’s Handbook
338
-----P-----
packet.
Logical grouping of information that includes a header and data. Compare frame, datagram.
PAP.
Password Authentication Protocol. Security protocol within the PPP protocol suite that prevents unau-
thorized access to network ser vices. See RFC 1334 for PAP specifications. Compare CHAP.
parity.
Method of checking the integrity of each character received over a communication channel.
Peer External IP Address.
The Peer External IP Address is the public, or routable IP address of the remote
gateway or VPN ser ver you are establishing the tunnel with.
Peer Internal IP Network.
The Peer Internal IP Network is the private, or Local Area Network (LAN) address
of the remote gateway or VPN Ser ver you are communicating with.
Peer Internal IP Netmask.
The Peer Internal IP Netmask is the subnet mask of the Peer Internal IP Net-
work.
PFS Enable.
Enable
P
er fect
F
or ward
S
ecrecy. PFS forces a DH negotiation during Phase II of IKE-IPSec SA
exchange. You can disable this or select a DH group 1, 2, or 5. PFS is a security principle that ensures that
any single key being compromised will permit access to only data protected by that single key. In PFS, the
key used to protect transmission of data must not be used to derive any additional keys. If the key was
derived from some other keying material, that material must not be used to derive any more keys.
PING.
Packet INternet Groper. Utility program that uses an ICMP echo message and its reply to verify that
one network node can reach another. Often used to verify that two hosts can communicate over a network.
PPP.
Point-to-Point Protocol. Provides a method for transmitting datagrams over serial router-to-router or
host-to-network connections using synchronous or asynchronous circuits.
Pre-Shared Key.
The Pre-Shared Key is a parameter used for authenticating each side. The value can be
an ASCII or Hex and a maximum of 64 characters
.
Pre-Shared Key Type.
The Pre-Shared Key Type classifies the Pre-Shared Key. SafeHarbour suppor ts
ASCII
or
HEX
types
Priority queueing.
Priority queueing (PQ) manages bandwidth resources on a network Gateway. It makes
sure that prioritized data packets, such as streaming video or Voice-over-IP, are for warded with the least
possible delay. All other traffic is handled when the highest priority queue is empty.
protocol.
Formal set of rules and conventions that specify how information can be exchanged over a net-
work.
PSTN.
Public Switched Telephone Network.
-----Q-----
QoS.
Quality of Ser vice. The ability of a network to prioritize cer tain kinds of network traffic to provide
reser ved bandwidth and reduced latency needed by some real-time and interactive traffic such as voice and
video over IP. QoS also provides priority for one or more flows, such that one flow does not make other flows
fail.