Which of the following three statements are correct regarding IPv6 QoS? (Choose three.)

A.
The traffic class field in the IPv6 header can be used to set specific precedence or DSCP
values.

B.
A 20-bit flow label field enables per-flow processing.

C.
DS-TE is not supported by IPv6.

D.
Per-hop behavior in IPv6 networks is based on EXP bits.

E.
IPv6 QoS features are configured using the modular QoS CLI on Cisco routers.

Explanation:

http://www.cisco.com/en/US/technologies/tk648/tk872/technologies_white_paper0900aecd8026004d.pdf