Which must be taken into account if a customer wants to use the DHCP collector with 802.1X authentication?

An organization wants to have guests connect their own personal devices to the wireless network without requiring a receptionist setting up a guest account.
Which ClearPass feature can be used to meet the organization's requirements?

What are benefits of using Network Device Groups in ClearPass? (Select two.)

Which fingerprint collectors can help to distinguish between an iPhone and an iPad? (Select two.)

Refer to the exhibit.

A user connects to an Aruba Access Point wireless SSID named 'Secure-Corporate" and performs an 802 1X authentication with ClearPass as the authentication server Based on this service configuration, which service will be triggered?