Hopefully this clears up the confusion, and you get the basic geometric rule. Concentricity error is exactly one half of the runout error. Still donât believe it, then try it for yourself in your favorite CAD program or with a physical 2D model.
Ethernet (the name commonly used for IEEE 802.3 CSMA/CD) is the dominant cabling and low level data delivery technology used in local area networks (LANs). Ethernet transmits data at up to ten million bits (i.e., 10 megabits) per second (10 Mbps).
What ATM is good for is high-speed LAN and WAN networking over a range of media types from the traditional coaxial cable, twisted pair, and fiberoptic to communications services of the future, including Fiber Channel, FDDI, and SONET (described in later sections of this chapter).