ZyXEL Communications Prestige 681 User Manual page 134

Prestige 681 SDSL Router
Network Address Translation is the translation of an Internet Protocol address used within
NAT
one network to a different IP address known within another network - see also SUA.
Network Driver Interface Specification is a Windows specification for how communication
NDIS
protocol programs (such as TCP/IP) and network device drivers should communicate with
each other.
Any time you connect 2 or more computers together so that they can share resources, you
Network
have a computer network. Connect 2 or more networks together and you have an internet.
Network Interface Card. A board that provides network communication capabilities to and
NIC
from a computer system. Also called an adapter.
Any single computer connected to a network
Node
Password Authentication Protocol PAP is a security protocol that requires users to enter a
PAP
password before accessing a secure system. The user's name and password are sent over
the wire to a server, where they are compared with a database of user account names and
passwords. This technique is vulnerable to wiretapping (eavesdropping) because the
password can be captured and used by someone to log onto the system.
Prestige Network Commander, a Windows-based setup wizard for Prestige routers (not all).
PNC
An Internet port refers to a number that is part of a URL, appearing after a colon (:) right after
Port
the domain name. Every service on an Internet server listens on a particular port number on
that server. Most services have standard port numbers, e.g. Web servers normally listen on
port 80.
Plain Old Telephone Service is the analog telephone service that runs over copper twisted-
POTS
pair wires and is based on the original Bell telephone system. Twisted-pair wires connect
homes and businesses to a neighborhood central office. This is called the local loop. The
central office is connected to other central offices and long-distance facilities.
Point to Point Protocol. PPP encapsulates and transmits IP (Internet Protocol) datagrams
PPP
over serial point-to-point links. PPP works with other protocols such as IPX (Internetwork
Packet Exchange). The protocol is defined in IETF (Internet Engineering Task Force) RFC
1661 through 1663. PPP provides router-to-router, host-to-router, and host-to-host
connections.
Public Switched Telephone Network was put into place many years ago as a voice telephone
PSTN
call-switching system. The system transmits voice calls as analog signals across copper
twisted cables from homes and businesses to neighborhood COs (central offices); this is
often called the local loop. The PSTN is a circuit-switched system, meaning that an end-to-
end private circuit is established between caller and callee.
Permanent Virtual Circuit. A PVC is a logical point-to-point circuit between customer sites.
PVC
PVCs are low-delay circuits because routing decisions do not need to be made along the
way. Permanent means that the circuit is preprogrammed by the carrier as a path through the
network. It does not need to be set up or torn down for each session.
An RFC (Request for Comments) is an Internet formal document or standard that is the result
RFC
of committee drafting and subsequent review by interested parties. Some RFCs are
informational in nature. Of those that are intended to become Internet standards, the final
D Glossary