(Multi-select) esight is a network management software positioned in the enterprise network scenario, which
can view the details of onu devices, including the following information?

The number of users under the OLT can also determine whether the VLA is single-layer or dual-layer VLA.
Single-layer VLANs can be used when the number of users is small, and dual-layer VLANs must be used
when the need to distinguish services and the number of users is second to ().