問題文
An operator of a visitor network hands each arriving guest a limited stretch of service, and wants the access device to take a settled step once that stretch runs out. The operator studies which message carries that settled step, and which second message may also carry the figure for how long a guest stays served. Which pair fits those two messages?
選択肢
- The instruction for the end of service travels in the granting notice and the ceiling on allowed seconds may ride in the metering round
- The instruction for the end of service travels in the granting notice and the ceiling on allowed seconds may ride in the asking round
- The instruction for the end of service travels in the invoicing notice and the ceiling on allowed seconds may ride in the asking round
- The instruction for the end of service travels in the invoicing notice and the ceiling on allowed seconds may ride in the metering round