Which of the following descriptions about the utility scheme is wrong?

Regarding the access method of Huawei cameras, which of the following statements is wrong?

In the light edge three-level networking scenario, if the first-level domain adopts Huawei HoloSens IVS3800, what forms can the second-level domain adopt?

Which of the following is not a survey element of the surrounding environment of the video site?

Fault information is an important basis for fault handling. Collect as much original fault information as possible, such as log information, networking information, etc. This information can speed up the locating speed of the cause of the fault and improve the accuracy of the locating.