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Media Access Methods
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3. MEDIA ACCESS METHODS CSMA/CD Carrier Sense Multiple Access with Collision Detection CSMA/CA Carrier Sense Multiple Access with Collision Avoidance Contention . (“listen before talking”)
4. MEDIA ACCESS METHODS Token passing :- IEEE 802.5 standard deals with Token Ring networks Token passing is implemented on a token-ring network.
5. MEDIA ACCESS METHODS Demand Priority. Demand priority is an access method used with the new 100Mbps 100VG-AnyLAN standard. Although demand priority is officially considered a contention-based access method, demand priority is considerably different from the basic CSMA/CD Ethernet. In demand priority, network nodes are connected to hubs, and those hubs are connected to other hubs. Contention, therefore, occurs at the hub. (100VG-AnyLAN cables can actually send and receive data at the same time.) Demand priority provides a mechanism for prioritizing data types. If contention occurs, data with a higher priority takes precedence.