3Com 100 TX User Manual

2 GLOSSARYClass I A type of 100BASE-T repeater with internal delay such that only onerepeater or stack may exist between any two end stations within a singlecollision domain when two maximum-length copper cable segments areused.Class II A type of 100BASE-T repeater with internal delay such that two repeaters orstacks may exist between any two end stations within a single collisiondomain when two maximum-length copper cable segments are used.Collision A condition that results from concurrent transmissions from multiplesources within a single collision domain.Collision domain A single CSMA/CD network. If two or more Media Access Control (MAC)sublayers are within the same collision domain and both transmit at thesame time, a collision will occur. MAC sublayers separated by a repeater arein the same collision domain; MAC sublayers separated by a bridge, router,or switch are within different collision domains.Ethernet A local area network standard defining a physical medium and its methodof placing data, or packet signaling, on a cable. Access to the cable is basedon CSMA/CD (carrier sense multiple access with collision detection).Fast Ethernet A 100 Mbps technology based on the Ethernet CSMA/CD network accessmethod.FDDI Fiber Distributed Data Interface. The local area networking standard thatprovides high bandwidth for interconnecting computers and peripheraldevices using a fiber-optic medium in a ring configuration.The FDDI specification is made up of standards that correspond to the IEEE OSImodel layers (on the physical and data link levels). These standards specify thephysical interfaces, functions, and operations needed to supportinteroperability between devices.Fiber-optic cable Cable consisting of a glass center, cladding, a buffer layer, strength members,and a cable sheath. The glass center supports the transmission of light signals.FMS Flexible Media Stack. 3Com’s family of stackable hubs.