問題文
An engineer selects CoAP for battery powered soil probes and must explain the choice to a team that knows only web protocols. Which statement about CoAP is accurate?
選択肢
- CoAP exchanges short readings over stream transport without firewall changes.
- CoAP exchanges short readings over datagram transport without lasting connections.
- CoAP exchanges short readings over broker topics without reachable servers.
- CoAP exchanges short readings over radio links without assigned addresses.