How can traffic be marked as it traverses the service provider’s network?

A service provider is using GRE for his transport tunnel on the Alcatel-Lucent 7750 SR.

How can traffic be marked as it traverses the service provider’s network? (Choose two)
A . Using dot1p bits of the 802.1q Ethernet frame header
B . Using DSCP bits within the ToS field of the IP packet header.
C . Using the IP precedence bits within the ToS field of the IP packet header.
D . Using the CLP bit of the ATM cell header.
E . Using the EXP bits of the MPLS transport label header.

View Answer

Answer: A,B