Explain how the use of full-duplex mode in a LAN can reduce collisions to zero.
Try an answer before revealing the guidance below.
Key Concepts
- Full duplex
- Point-to-point link
- Separate directions
- Collision domain
Answer Approach
- Describe the dedicated switch-to-host link.
- Explain why simultaneous sending in opposite directions does not contend for one medium.
- Conclude what this means for the CD part of CSMA/CD.
Full Answer
Answer status: Verified against study notes. Revision notes, not an official marking scheme.
On a full-duplex switched link, the two endpoints can transmit simultaneously over separate directional channels. They do not contend for a shared half-duplex medium, so Ethernet collisions on that link do not occur and CSMA/CD is unnecessary.
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