ZyXEL Communications Prestige 724, User Manual

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Prestige 724 G.SHDSL CSU/DSU
Glossary K
internet.
Intranet
A private network inside a company or organization that uses the same kinds of
software that you would find on the public Internet, but that is only for internal use.
IP
Internet Protocol. (Currently IP version 4 or IPv4). The underlying protocol for
routing packets on the Internet and other TCP/IP-based networks.
IPCP (PPP)
IP Control Protocol allows changes to IP parameters such as the IP address.
IPX
Internetwork Packet eXchange The native NetWare internetworking protocol is IPX
(Internetwork Packet Exchange). Like IP (Internet Protocol), IPX is an
internetworking protocol that provides datagram services.
IRC
Internet Relay Chat. IRC was developed in the late 1980s as a way for multiple users
on a system to “chat” over the network. Today IRC is a very popular way to “talk” in
real time with other people on the Internet. However, IRC is also one avenue hackers
use to obtain information about your system and/or company. Moreover, IRC sessions
are prone to numerous attacks that, while not dangerous, can cause system crashes.
ISP Internet Service Providers provide connections into the Internet for home users and
businesses. There are local, regional, national, and global ISPs. You can think of
local ISPs as the gatekeepers into the Internet.
ITU-T The ITU-T (Telecommunication Standardization Sector of the International
Telecommunications Union) is the primary international body for fostering
cooperative standards for telecommunications equipment and systems. It was
formerly known as the CCITT (Consultative Committee for International Telephony
and Telegraphy).
LAN
Local Area Network is a shared communication system to which many computers are
attached. A LAN, as its name implies, is limited to a local area. This has to do more
with the electrical characteristics of the medium than the fact that many early LANs
were designed for departments, although the latter accurately describes a LAN as
well. LANs have different topologies, the most common being the linear bus and the
star configuration.
LEC
Local Exchange Carrier. The local phone companies – either a Regional Bell
Operating Company (RBOC) or an independent phone company (e.g., GTE) – that
provide local transmission services.
LED Light Emitting Diode. LEDs are visual indicators that relay information about the
status of specific MI1951 functions to the user by lighting up, turning off or blinking.
LEDs are usually found on the front panel of the physical device. Examples include
Status, Power and System LEDS.
Linux A version of the UNIX operating system designed to run on IBM Compatible
computers.