Glossary
GL-4 Issue 1 September 1994
driver
A software module that controls an input/output port or external
device such as a keyboard or a monitor. TCP/IP uses a driver to
control the network interface cards.

DSU

Data Service Unit. A device that replaces a modem on a digital
data service line. The data service unit regenerates the digital
signals for transmission over digital facilities.
E

EIA

Electronic Industries Association. This organization provides
standards for the data communications industry to ensure
uniformity of interface between DTEs and DCEs.
Ethernet
Ethernet is a type of network that supports high-speed
communication among systems. It is a 10-Mb/s standard for
LANs. All hosts are connected to a coaxial cable where they
contend for network access using a Carrier Sence Multiple
Access with Collision Detection (CSMA/CD) paradigm.
Ethernet address
An Ethernet address is a six-part hexadecimal number in which
a colon separates each part (for example, 8:0:20:1:2f:0). This
number identifies the Ethernet communications board installed
in a PC and is used to identify the PC as a member of the
network.
export
Export is the process that makes a file available so that other
systems can access it.