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Table Of Contents  CertiGuide to Network+
 9  Chapter 0011:  Network Hardware
      9  III  Layer 1 – Physical Layer

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MAU

The Multistation Access Unit is used in Token Ring networks and physically appears very similar to the hub in an Ethernet environment, allowing network devices to communicate with each other. As with hubs, multiple devices individually plug into the MAU. If a MAU detects a failure on a device, it excludes that device from the network in order to maintain the ring.

Figure 35: Mau Multistation Access Unit

 


The MAU implements the ring of Token Ring as a logical circle. To maintain an electronic circle, you must plug in cable from the Ring in of one MAU to the Ring out of another MAU, and reverse this to complete the ring.

Ring

The Ring is a circle in the logical sense only. The cabling does not have to look like a circle. It can physically look like a bus, star (as in the illustration above) or ring.



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