Pretty sure this is B,E In some cases, DHCP fingerprinting alone cannot fully classify a device. A common example is the Apple family of smart devices; for example, DHCP fingerprints cannot distinguish between an iPad and an iPhone. In these scenarios, user-agent strings sent by browsers in the HTTP protocol are useful to further refine classification results. User-agent strings are collected from the following: ClearPass Guest ClearPass Onboard Aruba controller through an IF-MAP (Interface for Metadata Access Points) interface

ClearPass Profiling with IF-MAP This feature is used in conjunction with ClearPass Policy Manager. It sends HTTP User Agent Strings and mDNS broadcast information to ClearPass so that it can make more accurate decisions about what types of devices are connecting to the network. Answer: HTTP user agent string so HTTP and IF-MAP

I think it is C and E https://www.arubanetworks.com/techdocs/ClearPass/6.6/PolicyManager/index.htm#CPPM_UserGuide/PolicyProfile/Collectors.htm%3FTocPath%3DClearPass%2520Profiler%7C_____3

My Answer B, C. MAC-OUI - shows Apple iPhone when connecting on CPPM so therefore MAC aware of device type. IF-MAP - This feature is used in conjunction with ClearPass Policy Manager. It sends HTTP User Agent Strings and mDNS broadcast information to ClearPass so that it can make more accurate decisions about what types of devices are connecting to the network.

B and E - written in Clearpass profiling technote documentation

pretty sure it's IF-MAP

The MAC-OUI identifies the vendor only I would say