A Service Provider Is Using GRE for His Transport Tunnel

Multiple Choice

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.