GLOSSARY

10BASE-TThe IEEE 802.3 physical layer specification for a 10 Mbps Ethernet network over two pairs of Category 3, 4, or 5 UTP wire.

100BASE-TThe group of IEEE 802.3 physical layer specifications for a 100 Mbps Ethernet network over various wiring specifications.

1000BASE-XThe group of IEEE 802.3 physical layer specifications for a 1000 Mbps Ethernet network over various wiring specifications.

1000BASE-CXThe IEEE 802.3 physical layer specification for a 1000 Mbps Ethernet network over short-haul shielded balanced copper cable (known as twinaxial STP).

1000BASE-LXThe IEEE 802.3 physical layer specification for a 1000 Mbps Ethernet network over long laser wavelength (1300 nm) multimode fiber (MMF) or single-mode fiber (SMF) cable.

1000BASE-SXThe IEEE 802.3 physical layer specification for a 1000 Mbps Ethernet network over short laser wavelength (850 nm) MMF or SMF cable.

Advanced RPS 3Com SuperStack II Advanced Redundant Power System.

asymmetric A relationship between linked network devices in which only one of the flow control devices can receive pause frames. See also flow control, pause frame,

symmetric flow control.

auto-negotiationA method by which linked devices advertise their signaling capabilities (such as protocol, speed, media type, and flow control capabilities) and automatically select their best common mode of communication.

backbone The main transmission medium used to interconnect the workgroup areas of a network. Fiber-optic cable is often used for the backbone connection.

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3Com Hub 1000 SX manual Glossary