350-401 Practice Question: Drag and drop the steps of DSCP-to-CoS mapping at…

Drag and drop the steps of DSCP-to-CoS mapping at LAN boundary into the correct order, from first to last.

Drag steps to the numbered slots on the right, or tap a step then tap a slot.

Steps

Order

1Step 1

2Step 2

3Step 3

4Step 4

5Step 5

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Configure trust dscp on the ingress interface

First, trust the DSCP on the ingress interface. Then, map DSCP to CoS using a table-map. Apply the table-map in a policy-map. Finally, apply the policy-map to the interface.

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Same concept, more angles

1 more way this is tested on 350-401

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Variation 1. Drag and drop the steps of DSCP-to-CoS mapping at LAN boundary into the correct order, from first to last.

medium

✓ A.Trust DSCP on the ingress interface
✓ B.Map DSCP to CoS using mls qos map
✓ C.Set CoS value in 802.1Q header
✓ D.Apply egress queueing based on CoS
✓ E.Transmit frame on trunk port

Why A: At the LAN boundary (switch port), DSCP is mapped to CoS for 802.1Q trunking. The order ensures proper trust, mapping, and queuing for consistent QoS across the campus network.

Last reviewed: Jun 18, 2026

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