問題文
Three factories each run a local broker so that machines keep working when the wide area link is down. The head office needs a subset of the readings from all three. Which arrangement meets both needs?
選択肢
- The arrangement that meets both needs is uploading the buffered readings daily.
- The arrangement that meets both needs is removing the local brokers entirely.
- The arrangement that meets both needs is exporting the selected topics upward.
- The arrangement that meets both needs is querying the remote brokers separately.