Deploying Cisco Service Provider Core Network Technologies (SPCORE, legacy) — Question 8

A service provider recently defined new SLA services that provide QoS transparency over MPLS DiffServ-TE services. Which two tunneling modes provide QoS transparency? (Choose two.)

Answer options

• A. short pipe mode
• B. uniform mode
• C. pipe mode with an explicit NULL LSP
• D. pipe mode without a explicit NULL LSP
• E. best effort mode

Correct answer: A, C

Explanation

The correct answers, short pipe mode and pipe mode with an explicit NULL LSP, both maintain QoS transparency by preserving the original packet's QoS markings. The other options, uniform mode, pipe mode without an explicit NULL LSP, and best effort mode, do not provide the same level of QoS transparency, making them incorrect choices.