What is the maximum number of hexadecimal characters allowed when configuring the WPA or WPA2passphrase in Cisco ADU？（）

EAP-FAST provides a secure tunnel during Phase One to protect the user’s authentication credentials.
Which of these entities initializes the secure tunnel？（）

One of your customers has decided to deploy location-based services in addition to existing wireless services. The customer requires that the additional access points to be deployed in monitor-only mode.
The most likely reason for this requirement is that the customer has which of these existing wireless devices？（）