When replacing the antenna of a WLAN device with a similar antenna type that has a higher passive gain, what antenna characteristic will decrease?

The OSI model is a 7-layer model for understanding the functions of a communication system.
What OSI sublayers are specifically addressed by the IEEE 802.11-2012 standard? (Choose 2)

You are troubleshooting a problem with interference from a non-802.11 device. Given that the device is not a WLAN device, you cannot use a protocol analyzer and have chosen to use a spectrum analyzer. You want to view the signal from the interfering device over time to sec the activity that it is generating. What common spectrum analyzer view should you use for this analysis?

What is the final step in an effective troubleshooting process?

Option 43 must be configured to allow access points to locate controller. In what network service should this option be configured?