Question

AT 5. Explain the Medium Access Control (MAC) method in CAN by drawing an ex: example.

Answer 1

A way to allow computers to transmit signals over network cabling while ensuring that only one computer transmits at a time. If two computers simultaneously place signals on the wire, a collision can occur and data might be corrupted unless a method is used to resolve the collision gracefully.

Media access control methods act like traffic lights by permitting the smooth flow of traffic on a network, and they prevent or deal with collisions. Media access control methods are implemented at the data-link layer of the Open Systems Interconnection (OSI) reference model.

Four main media access control methods are used in networking:

• Carrier Sense Multiple Access with Collision Detection (CSMA/CD), which is used in Ethernet networking
• Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA), which is used in AppleTalk networking
• Token passing, which is used in Token Ring and Fiber Distributed Data Interface (FDDI) networking
• Demand priority, which is used in 100BaseVG networking

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