ZyXEL Communications Prestige 941 User Manual page 91

Prestige 941 Cable Router
NAT: Network Address Translation is the translation of an Internet Protocol address used within one network
to a different IP address known within another network.
Network: Any time you connect 2 or more computers together so that they can share resources, you have a
computer network. Connect 2 or more networks together and you have an Internet.
NIC: Network Interface Card. A board that provides network communication capabilities to and from a
computer system.
Node: Any single computer connected to a network.
One-way Cable Modem: A one-way Cable Modem uses the TV cable for the downstream (receive) and a
telephone modem for upstream (transmit).
POP3: Post Office Protocol, version 3.
Port: An Internet port refers to a number that is part of a URL, appearing after a colon (:) right after 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 in on port 80.
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.
Ranging: The process of automatically adjusting transmission levels and time offsets of individual modems
in order to make sure the bursts coming from different modems line up in the right timeslots and are received
at the same power level at the CMTS.
RFC: An RFC (Request for Comments) is an Internet formal document or standard that is the result of a
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 version of the RFC becomes the standard and
no further comments or changes are permitted. Change can occur however, through subsequent RFCs.
RIP: Routing Information Protocol is an interior or intra-domain routing protocol that uses the distance-
vector routing algorithms. RIP is used on the Internet and is common in the NetWare environment as a
method for exchanging routing information between routers.
Set-Top Box: A set-top box is a device that enables a television set to become a user interface to the
Internet and also enables a television set to receive and decode digital television (DTV) broadcasts.
Glossary E