フリー問題

問題文

A plant is comparing WirelessHART with ISA100.11a, and finds that both run over the same 802.15.4 radio with time slots and channel hopping. Which pair states how each of the two treats the choices left to the user?

選択肢

1. The two industrial stacks sit on the same radio standard, so the WirelessHART side freezes the whole profile and the ISA100 side forbids the deeper tuning in that specification.
2. The two industrial stacks sit on the same radio standard, so the WirelessHART side freezes the whole profile and the ISA100 side allows the deeper tuning in that specification.
3. The two industrial stacks sit on the same radio standard, so the WirelessHART side negotiates the whole profile and the ISA100 side allows the deeper tuning in that specification.
4. The two industrial stacks sit on the same radio standard, so the WirelessHART side negotiates the whole profile and the ISA100 side forbids the deeper tuning in that specification.