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YOUNGWOO TELECOM Network Development Team
Appendix C Terminology
VDSL(Very high-bit rate Digital Subscriber Line)
This is modem technology that enables operator to offer multi-megabyte service to subscriber by existing
copper-fiber infrastructure.
Base-T
With bandwidth that supports up to 10Mbps transmission rate, it is LAN interface that uses category 5 cable.
ATM
ATM is an acronym of Asynchronous Transfer Mode. This is one of communication transfer methods. ATM
refers to a control method that enables other multiple terminals to simultaneously send data when a certain
terminal sends data to have a piece of transmission line shared by several terminals for communication.
Ethernet
This is a major LAN access method jointly developed by Xerox, Intel, and DEC. It uses transmission cable
10BASE standard. Transmission rate is about 10Mbps or so, and a node monitors signals on transmission
line. It uses CSMA/CD access method that sends data after checking that all other nodes do not transmit
signals.
LAN
This is a major LAN access method jointly developed by Xerox, Intel, and DEC. It uses transmission cable
10BASE standard. Transmission rate is about 10Mbps or so, and a node monitors signals on transmission
line. It uses CSMA/CD access method that sends data after checking that all other nodes do not transmit
signals.
FTP (File Transfer Protocol)
FTP is an acronym of File Transfer Protocol. FTP transmits files between host and host and between host
and PC in network.
IP Address
IP(Internet Protocol) address is the address of host or device in the Internet. It consists of 4 bytes, and each
byte is divided into periods. To avoid redundancy, it assigns IP address by IANA(Internet Assigned Numbers
Authority).
KT KORNET (Internet Service Provider)
Korea Telecom KORNET means Internet Service Provider. KT KORNET maintains network connected to
the Internet through high speed link known as T1, and dedicated communication circuit. KT KORNET
provides usage right of dedicated lines to companies or individuals. Modem users connects their PCs to the
Internet by paying some charges. When data moves through network, data is sent divided into packets. At
this time, they can place a call to KT KORNET.