Which of the following is true about the CSMA/CD algorithm?
- The algorithm never allows collisions to occur.
- Collisions can happen, but the algorithm defines how the computers should notice a collision and how to recover.
- The algorithm works with only two devices on the same Ethernet.
- None of the other answers is correct.
Explanation: NICs (and switch ports) use the carrier sense multiple access with collision detection (CSMA/CD) algorithm to implement half-duplex logic. CSMA/CD attempts to avoid collisions, but it also notices when collisions do occur, with rules about how the Ethernet nodes should stop sending, wait, and try again later.
