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Exam 642-887 topic 1 question 97 discussion

Actual exam question from Cisco's 642-887
Question #: 97
Topic #: 1
[All 642-887 Questions]

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.)

  • 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
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Suggested Answer: AC 🗳️
by FoggiestIE at Dec. 10, 2019, 12:18 p.m.

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FoggiestIE
5 years, 6 months ago
There are three MPLS QoS tunneling modes for the operation and interaction between the DiffServ marking in the IP header and the DiffServ marking in the MPLS header: Pipe mode with an explicit NULL LSP, Short Pipe mode, and Uniform mode. Pipe mode with an explicit NULL LSP and Short Pipe mode allow an MPLS network to transparently tunnel the DiffServ marking of packets. https://www.cisco.com/c/en/us/td/docs/ios/12_2sb/12_2sba/feature/guide/sbadftnl.pdf
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