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Glossary-1
Glossary
10BASE-T IEEE 802.3 specification for 10 Mbit/sec Ethernet over two pairs of Category 3,
4, or 5 UTP cable.
100BASE-TX IEEE 802.3u specification for 100 Mbit/sec Fast Ethernet over two pairs of
Category 5 UTP cable.
1000BASE-T IEEE 802.3ab specification for Gigabit Ethernet over two pairs of Category 5, 5e
100-ohm UTP cable.
1000BASE-X IEEE 802.3 shorthand term for any 1000 Mbit/sec Gigabit Ethernet based on
8B/10B signaling.
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.
Bandwidth
Utilization The historical percentage of packets received as compared to total bandwidth.
BOOTP Boot protocol used to load the operating system for devices connected to the
network.
Auto-negotiation Signalling method allowing each node to select its optimum operational mode
(for example, 10, 100, or 100 Mbit/sec and half or full duplex) based on the
capabilities of the node to which it is connected.
Collision A condition in which packets transmitted over the cable interfere with each
other. Their interference makes both signals unintelligible. This only applies to
half-duplex connections.
Collision Domain Single CSMA/CD LAN segment.
CSMA/CD Carrier Sense Multiple Access/Collision Detect is the communication method
employed by Ethernet and Fast Ethernet.