Which of the following statements about NBAR is true?

A.
NBAR is supported on multicast enabled interfaces

B.
NBAR can match up to the 512 bytes in a packet payload

C.
NBAR can classify application traffic by looking beyond the the TCP/UDP port numbers of a packet

D.
NBAR can be used to classify output traffic on a WAN link where tunneling or encryption is used/

Explanation:
Page 185, IP Telephony Self-Study Cisco DQOS Exam Certification Guide, http//www.ciscopress.com/title/1587200589