ZyXEL Communications Prestige 314 User Manual page 186

Prestige 314 Broadband Sharing Gateway with 4-Port Switch
Plain Text
Plain Text is clear text, readable by anyone – it is the opposite of cipher text.
Point of The physical point where the phone company ends its responsibility with the wiring of
the phone line.
Demarcation
POP
Post Office Protocol. This is a common protocol used for sending, receiving, and
delivering mail messages.
Port
An Internet port refers to a number that is part of a URL, appearing after a colon (:),
directly following 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.
Port (H/W)
An interface on a computer for connecting peripherals or devices to the computer. A
printer port, for example, is an interface that is designed to have a printer connected to
it. Ports can be defined by specific hardware (such as a keyboard port) or through
software.
POTS
Plain Old Telephone Service is the analog telephone service that runs over copper
twisted-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.
PPP
Point to Point Protocol. PPP encapsulates and transmits IP (Internet Protocol)
datagrams 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.
PPPoE
PPTP
Point-to-Point Tunneling Protocol.
A "language" for communicating on a network. Protocols are sets of standards or rules
Protocol
used to define, format and transmit data across a network. There are many different
protocols used on networks. For example, most web pages are transmitted using the
N
PPPoE (Point-to-Point Protocol over Ethernet) relies on two widely accepted standards:
PPP and Ethernet. PPPoE is a specification for connecting the users on an Ethernet to
the Internet through a common broadband medium, such as a single DSL line, wireless
device or cable modem. All the users over the Ethernet share a common connection, so
the Ethernet principles supporting multiple users in a LAN combine with the principles
of PPP, which apply to serial connections. From authentication, accounting and secure
access to configuration management, PPPoE supports a broad range of existing
applications and services.
Glossary