Glossary – NetComm NCT240 User Manual

Page 35

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NetComm NCT240 Installation Guide Release 1.0

9. Glossary


IEEE 802.3 specification for 10 Mbps Ethernet over two pairs of Category 3, 4, or 5 UTP cable.


IEEE 802.3u specification for 100 Mbps Fast Ethernet over two pairs of Category 5 UTP cable.


IEEE 802.3u specification for 100 Mbps Fast Ethernet over two strands of 50/125, 62.5/125 or

9/125 micron core fiber cable.


IEEE 802.3ab specification for Gigabit Ethernet over 100-ohm Category 5 or 5e twisted-pair

cable (using all four wire pairs).


Signaling method allowing each node to select its optimum operational mode (e.g., 10 Mbps

or 100 Mbps and half or full duplex) based on the capability of the node to which it is



The difference between the highest and lowest frequencies available for network signals.

Also synonymous with wire speed, the actual speed of the data transmission along the cable.


A condition in which packets transmitted over the cable interferes with each other. Their

interference makes both signals unintelligible.

Collision Domain

Single CSMA/CD LAN segment.


CSMA/CD (Carrier Sense Multiple Access/Collision Detect) is the communication method

employed by Ethernet, Fast Ethernet, or Gigabit Ethernet.

End Station

A workstation, server, or other device that does not forward traffic.


A network communication system developed and standardized by DEC, Intel, and Xerox,

using baseband transmission, CSMA/CD access, logical bus topology, and coaxial cable. The

successor IEEE 802.3 standard provides for integration into the OSI model and extends the

physical layer and media with repeaters and implementations that operate on fiber, thin

coax and twisted-pair cable.

Fast Ethernet

A 100 Mbps network communication system based on Ethernet and the CSMA/CD access


Gigabit Ethernet