POL stands for Passive Optical LAN in Huawei’s context, per HCSA-Sales-Transmission & Access. It applies PON technology to enterprise campuses, replacing traditional LANs with fiber-based, passive solutions. Other options (A, B, C) are unrelated, making D correct.
[Reference: Huawei POL Definition, HCSA-Sales-Transmission & Access training slides., , ]
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