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IEEE 802.6 MAN
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Presentation Transcript
1. IEEE 802.6 (MAN) Random Access Scheme
packet collision => waste resources
retry backoff => bus idle
Controlled Access Scheme
slow access at light load
overhead of token traveling. Distributed Control/Queuing (of messages)
It forms a single and distributed queue which controls the access of packets to the subnet in essentially the same order as they were generated
Under light load, it behaves as CSMA/CD
Under heavy load, it behaves as token passing
Different levels of priority
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