The following is about the actual field survey in WLAN (cable or fiber), power supply, which is correct? (Multiple choice)
A . confirm the overall rules of the alignment, need to confirm with the owners whether the wall through the hole, whether to clear the line, whether the conditions of concealed alignment, whether the use of wire mesh or wire
B . It is necessary to calculate the length of the trace according to the actual environment, without considering the length of the line
C . If the AP needs to exchange power supply, you need to confirm the location of the power supply, some places have special requirements for the alignment, the need for additional labeling
D . Outdoor scene measurements in each outdoor AP installation location need to consider the routing problem
Answer: AC