A bus topology uses terminators at each end of the main cable.
State the purpose of terminators in a bus topology.
Mark scheme
Award one mark for:
- Absorb signals (at the ends of the bus cable) / prevent signals reflecting (back along the cable) (1)
Allow 'stop data/signals bouncing back' for prevent signals reflecting
Do not accept 'terminate the cable' / 'close the end of the cable' on its own
Do not accept boost/repeat/strengthen the signal
Example answers and how they were marked
To absorb signals so that they do not reflect back along the bus cable.
Why: Absorbing signals and preventing reflection are alternatives within the one creditworthy point (1).
To terminate the cable at each end.
Why: Near miss: this is rejected by the 'terminate the cable' guidance because it does not say signals are absorbed or prevented from reflecting.
To make the signal stronger at the end of the cable.
Why: Misconception: terminators absorb signals; they do not boost, repeat or strengthen them.