Huawei Exam H31-161 Topic 7 Question 26 Discussion

Actual exam question for Huawei's H31-161 exam

Question #: 26
Topic #: 7

As shown in the figure, the DiffServ model is deployed in E-LSP mode on the MPLS network. A tester connects to GE interfaces of RTA and RTC on the edge of the MPLS network through GE links. The trust upstream default command is configured for interfaces on the IP access side of RTA and RTC. When the tester sends IP packets with DSCP values 10, 12, and 14,the DSCP values of IP packets received at the receiver side are supposed to remain unchanged. However, the DSCP values of all received IP packets are 10. In this case, which of the following statements are true? (Default mapping is configured between the EXP and DSCP values on each router.)

AThe DSCP values are 10 when RTA's IP packets leave the MPLS network because the EXP values are 1 when RTA's IP packets enter the MPLS network.

BThe configurations on RTA or RTC are incorrect.

CIf the qos phb disable command is configured for the outbound interface on the IP access side of RTC, the DSCP values of packets the tester receives remain unchanged.

DThe DSCP values of packets the tester receives are 10 regardless of whether qos phb disable is configured for the outbound interface on RTC's IP access side.

Show Suggested Answer

Suggested Answer: A, C

by Trinidad at May 06, 2022, 07:26 AM

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