An employee at a company notices that the wireless signal strength indicator on his laptop fluctuates(波动) from good to low. The network administrator decides to do a site survey(现场勘测) of that area. Which three factors need to be included in the survey? (Choose three.) type and model number of the WNIC of the laptop number of users in the area location of the AP list of MAC addresses filtered by the AP number of simultaneous applications running on the laptop of the employee lo