問題文
A technician notices that an 802.15.4 acknowledgment frame is far shorter than the data frame it answers, and asks how much the sender may conclude from it. Which pair states what the short reply carries and how far its promise reaches?
選択肢
- The acknowledgment is the shortest of the frame types, so the short reply echoes the stored hash and the same reply covers the nearby exchange in that specification.
- The acknowledgment is the shortest of the frame types, so the short reply echoes the stored counter and the same reply covers the nearby routing in that specification.
- The acknowledgment is the shortest of the frame types, so the short reply echoes the stored counter and the same reply covers the nearby exchange in that specification.
- The acknowledgment is the shortest of the frame types, so the short reply echoes the stored hash and the same reply covers the nearby routing in that specification.