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Appendix: Glossary
Appendix. 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 Ethernet over two pairs of Category 5 UTP cable.
1000BASE-LH: Specification for long-haul Gigabit Ethernet over two strands of 9/125 micron core fiber cable.
1000BASE-LX: IEEE 802.3z specification for Gigabit Ethernet over two strands of 50/125, 62.5/125, or 9/125 micron core fiber
cable.
1000BASE-SX: IEEE 802.3z specification for Gigabit Ethernet over two strands of 50/125 or 62.5/125 micron core fiber cable.
1000BASE-T: IEEE 802.3ab specification for Gigabit Ethernet over 100-ohm Category 5, 5e or 6 twisted-pair cable (using all four
wire pairs).
Auto-Negotiation: Signaling method allowing each node to select its optimum operational mode (e.g., speed and duplex mode)
based on the capabilities 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 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, and 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, were 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.
Full Duplex: Transmission method that allows two network devices to transmit and receive concurrently, effectively doubling the
bandwidth of that link.
Gigabit Ethernet: A 1000-Mbps network communication system based on Ethernet and the CSMA/ CD access method.
IEEE: Institute of Electrical and Electronic Engineers.
IEEE 802.3: Defines carrier sense multiple access with collision detection (CSMA/CD) access method and physical layer
specifications.
IEEE 802.3AB: Defines CSMA/CD access method and physical layer specifications for 1000BASE-T Gigabit Ethernet. (Now incor-
porated in IEEE 802.3-2005.)
IEEE 802.3U: Defines CSMA/CD access method and physical layer specifications for 100BASE- TX Fast Ethernet. (Now incorporat-
ed in IEEE 802.3-2005.)
IEEE 802.3X: Defines Ethernet frame start/stop requests and timers used for flow control on full-duplex links. (Now incorporated
in IEEE 802.3-2005.)
IEEE 802.3Z: Defines CSMA/CD access method and physical layer specifications for 1000BASE Gigabit Ethernet. (Now incorporat-
ed in IEEE 802.3-2005.)
LAN Segment: Separate LAN or collision domain.
LED: Light emitting diode used for monitoring a device or network condition.
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