問題文
A handheld terminal connects for a few minutes several times a day. Between visits its subscriptions should survive for two hours but not indefinitely, so that the broker does not hold state for terminals that have been withdrawn. Which setting achieves this?
選択肢
- The requirement is met by a resumed session with a bounded expiry.
- The requirement is met by a resumed session with a delayed removal.
- The requirement is met by a short keepalive with a quick release.
- The requirement is met by a clean session with a fresh subscription.