Which additional feature does MPLS DiffServ tunneling support?
A . matching EXP and DSCP values
B . interaction between MPLS and IGP
C . using GRE tunnels to hide markings
D . PHB layer management
Answer: D
Explanation:
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_te_diffserv/configuration/15-mt/mp-te-diffserv-15-mt-book/mp-diffserv-tun-mode.html
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