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NetComm NCT240 Installation Guide Release 1.0
9. Glossary
10BASE-T
IEEE 802.3 specification for 10 Mbps Ethernet over two pairs of Category 3, 4, or 5 UTP cable.
100BASE-TX
IEEE 802.3u specification for 100 Mbps Fast Ethernet over two pairs of Category 5 UTP cable.
100BASE-FX
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.
1000BASE-T
IEEE 802.3ab specification for Gigabit Ethernet over 100-ohm Category 5 or 5e twisted-pair
cable (using all four wire pairs).
Auto-Negotiation
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
connected.
Bandwidth
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.
Collision
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
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.
Ethernet
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
method.
Gigabit Ethernet
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