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4. Full-Duplex Ethernet > 4.1. Operation of Full-Duplex

Operation of Full-Duplex

The following requirements, as stated in the 802.3x standard, must be met for full-duplex operation:

  • The media system must have independent transmit and receive data paths that can operate simultaneously. Such data paths are typically found on twisted-pair and fiber optic links.

  • There are exactly two stations connected with a full-duplex point-to-point link. Since there is no contention for use of a shared medium, the multiple access algorithms (i.e., Carrier Sense with Multiple Access and Collision Detect, or CSMA/CD) are unnecessary.

  • Both stations on the LAN are capable of, and have been configured to use, the full-duplex mode of operation. This means that both Ethernet interfaces must have the capability to simultaneously transmit and receive frames.


  

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