
Administrator’s Handbook
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 services. 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 server 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 Server 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 Perfect Forward Secrecy. PFS forces a DH negotiation during Phase II of
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.
Priority queueing. Priority queueing (PQ) manages bandwidth resources on a network Gateway. It makes sure that prioritized data packets, such as streaming video or
protocol. Formal set of rules and conventions that specify how information can be exchanged over a net- work.
PSTN. Public Switched Telephone Network.
QoS. Quality of Service. The ability of a network to prioritize certain kinds of network traffic to provide reserved bandwidth and reduced latency needed by some