Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) — Question 283

Which additional feature does MPLS DiffServ tunneling support?

Answer options

• A. matching EXP and DSCP values
• B. PHB layer management
• C. using GRE tunnels to hide markings
• D. interaction between MPLS and IGP

Correct answer: B

Explanation

The correct answer is B because MPLS DiffServ tunneling facilitates the management of Per-Hop Behavior (PHB) layers, which is essential for Quality of Service (QoS). The other options do not accurately reflect the additional features supported by MPLS DiffServ tunneling, as they relate to other aspects of MPLS or IP tunneling.