OLT (Optical Line Terminal) : Central office equipment that connects to the core network.
ODN (Optical Distribution Network) : Consists of optical fibers, splitters, and connectors that distribute signals between the OLT and ONUs.
ONU (Optical Network Unit) : End-user equipment that connects to customer devices.
OAM (Operations, Administration, and Maintenance) :
OAM refers to a set of tools and protocols used for managing and maintaining the network. It is not a physical component of the PON system.
Why A?
OAM is a function or process, not a physical part of the PON network system.
Thus, the correct answer is A .
References:
HCIA Huawei ACCESS Official Documentation , Chapter: PON Network Components.
GPON System Architecture by Huawei.
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