Huawei devices support independent mapping/remarking for inner and outer VLAN priorities (802.1p CoS) when QinQ is used. Operators can define distinct mapping tables or remark rules per tag. Option A is incorrect (priorities can be derived or remarked, not “must be” tag-in-packet), option C is incorrect because mapping profiles are configurable, and option D confuses VLAN IDs with priorities; inner/outer CoS can be mapped independently for inbound/outbound directions.
[References: HCIP-Access V2.5 Study Guide (QoS Priority Mapping and Remarking); Huawei VLAN/QoS Configuration Guide (Inner/Outer 802.1p handling)., , ]
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