Metropolitan-Area Networks and Technologies
Around the same time that the IEEE was developing LAN standards and IEEE 802.3, a new consortium was formed to study metropolitan-area networks (MANs). The consortium's original intent was to bridge the gap between WAN technologies such as ATM or ISDN, and LAN technologies such as Ethernet or local ATM. The original design goals were to provide a shared, fairly high-speed fiber optic network that was optimized to operate over distances from several city blocks to approximately 30 miles, about the size of large city.
Distributed Queue Dual Bus
The standard resulting from this IEEE study is numbered 802.6, and named Distributed Queue Dual Bus (DQDB), which essentially describes both the topology ...
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