フリー問題

問題文

A plant engineer must connect 400 vibration sensors spread over three kilometers of open yard, and is weighing a long-range LPWAN link against a short-range mesh. Which pair states what the long-range family gives up and what a short-range forwarding node must supply?

選択肢

1. The two families answer different needs, so the long-range family gives up the peak latency and each middle device draws the steady current in that specification.
2. The two families answer different needs, so the long-range family gives up the peak latency and each middle device draws the steady energy in that specification.
3. The two families answer different needs, so the long-range family gives up the peak throughput and each middle device draws the steady energy in that specification.
4. The two families answer different needs, so the long-range family gives up the peak throughput and each middle device draws the steady current in that specification.