Huawei Exam H31-161 Topic 6 Question 28 Discussion

Actual exam question for Huawei's H31-161 exam

Question #: 28
Topic #: 6

[All H31-161 Questions]

The edge routers of the MPLS network, partial interface configurations on the IP access side are as

follows:

[Quidway]diffserv domain default

[Quidway-dsdomain-default]ip-dscp-inbound 10 phb ef green

[Quidway-dsdomain-default]mpls-exp-outbound ef green map 5

[Quidway-dsdomain-default]mpls-exp-inbound 4 phb ef green

[Quidway-dsdomain-default]ip-dscp-outbound ef green map 18

[Quidway-dsdomain-default]quit[Quidway] interface GigabitEthernet 2/0/0

[Quidway-GigabitEthernet2/0/0] trust upstream default

[Quidway-GigabitEthernet2/0/0] port-queue ef pq shaping 20 outbound

Which of the following statements about the preceding configurations are true?

AThe trust upstream default command maps the DSCP priority to the corresponding EXP value when an IP packet enters the MPLS network and maps the EXP value to the corresponding DSCP priority when an IP packet leaves the MPLS network.

BIf an IP packet with a DSCP value of 10 is sent to the MPLS network (non-PHP node) from
GigabitEthernet 2/0/0, the corresponding EXP value is 5. If an MPLS packet with an EXP value of 4 is sent from GigabitEthernet 2/0/0, the DSCP value of the corresponding IP packet remains unchanged.

CThe port-queue ef pq shaping 20 outbound command configures PQ scheduling and a maximum of 20 Mbit/s bandwidth for the EF queue when GigabitEthernet 2/0/0 sends IP packets.

DWhen GigabitEthernet 2/0/0 sends IP packets, the bandwidth of these sent IP packets can reach 1 Gbit/s if the EXP value is 4.

Show Suggested Answer

Suggested Answer: A, C

by Aliza at May 05, 2022, 08:26 PM

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