ZyXEL Communications Prestige 724, Руководство пользователя

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Prestige 724 G.SHDSL CSU/DSU
J Glossary
Frame Relay Frame relay is a form of packet-switching technology that routes frames of
information from source to destination over a switching network owned by a carrier.
Frame sizes are not fixed.
G.SHDSL
A Single-pair High-speed Digital Subscriber Line is a symmetrical, bi-directional
DSL service that operates on one twisted-pair wire. The “G.” in “G.SHDSL” refers to
ITU (International Telecommunication Union) “G” standards. G.SHDSL provides
data rates from 192kbps up to 2.3 Mbps at distances of 6,000 feet to 20,000 feet on 26
AWG copper. Unlike traditional HDSL systems, which use two twisted pair,
G.SHDSL reduces equipment and lease-line costs by providing the same service
using only one twisted pair. See also DSL.
Gateway A gateway is a computer system or other device that acts as a translator between two
systems that do not use the same communication protocols, data formatting structures,
languages, and/or architecture.
HDLC High-level Data Link Control is a bit-oriented (the data is monitored bit by bit), link
layer protocol for the transmission of data over synchronous networks.
Host
Any computer on a network that is a repository for services available to other
computers on the network. It is quite common to have one host machine provide
several services, such as WWW and USENET.
HTTP Hyper Text Transfer Protocol. The most common protocol used on the Internet. HTTP
is the primary protocol used for web sites and web browsers. It is also prone to certain
kinds of attacks.
IANA Internet Assigned Number Authority acts as the clearing house to assign and
coordinate the use of numerous Internet protocol parameters such as Internet
addresses, domain names, protocol numbers, and more. Use a search engine to find
the current IANA web site.
ICMP
Internet Control Message Protocol is a message control and error-reporting protocol
between a host server and a gateway to the Internet ICMP uses Internet Protocol (IP)
datagrams, but the messages are processed by the TCP/IP software and are not
directly apparent to the application user.
Inside Wiring Wiring that is done from the point of demarcation to the jack in the wall where the
line terminates.
Integrity
Proof that the data is the same as originally intended. Unauthorized software or
people have not altered the original information.
Internet (Upper case “I”). The vast collection of inter-connected networks that use TCP/IP
protocols evolved from the ARPANET (Advanced Research Projects Agency
Network) of the late 1960’s and early 1970’s.
internet (Lower case “i”). Any time you connect two or more networks together, you have an