Security auditors determine the use of WAPs on their networks with Nessus vulnerability scanner which identifies the commonly used WAPs. One of the plug-ins that the Nessus Vulnerability Scanner…

Security auditors determine the use of WAPs on their networks with Nessus vulnerability scanner which identifies the commonly used WAPs. One of the plug-ins that the Nessus Vulnerability Scanner uses is ID #11026 and is named "Access Point Detection". This plug-in uses four techniques to identify the presence of a WAP. Which one of the following techniques is mostly used for uploading new firmware images while upgrading the WAP device?