TheHuawei NetEngine 8000 MIA and NetEngine 8000 M6routers arecompact, high-performance routers, but their depth isnot220 mm.
These routers aredesigned for high-capacity edge computingwithultra-high-density interfaces.
The actual depthvaries by model and configurationbut exceeds220 mmdue tohigh-performance hardware requirements.
#Reference:HCSA-Presales-IP Network Official Study Guide, NetEngine 8000 Series Specifications

The Huawei AC6805 is a high-performance wireless access controller designed for large-scale enterprise networks. It supports up to 120 Gbps of forwarding capacity, enabling it to handle high-density Wi-Fi deployments and demanding applications like video streaming and IoT.
The other options (60 Gbps, 40 Gbps, and 100 Gbps) do not match the specifications of the AC6805. While lower-end models in the AC series may have reduced forwarding rates, the AC6805 is specifically designed to deliver exceptional performance for large-scale networks.
Thus, the correct answer is A .
References:
* Huawei AC6805 Wireless Access Controller Product Documentation, HCSA-Presales-IP Network Documentation.