Red Seal Electrician Practice
Signalling and communicationQuestion 148 of 1506

A token-passing network splits when a cable connection comes undone, and each part makes its own token. What happens when the cable is plugged back in?

  1. Two tokens circulate on the one network, so transmissions collide
  2. The extra token is removed automatically by the first node that sees it
  3. The network speed doubles, since there are two tokens
  4. Both halves lose power when the cable is plugged in
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Correct answer: Two tokens circulate on the one network, so transmissions collide

Some token-passing systems regenerate a token after silence, which causes this problem.

Source: Lessons in Electric Circuits IV: Digital (Kuphaldt), 14.8: Practical considerations - Digital Communication

Practice signalling and communication

Questions last reviewed: 18 October 2026