Is the following description correct? VPI/VCI is a global concept and must be unique under the interface.

Is the following description correct? The idea of the FTTx device offline deployment plan is to generate offline device configuration data through network planning dat a. After the device is installed and powered on, the configuration data is automatically issued to achieve the purpose of plug-and-play equipment.

Regarding multicast and IPTV, which of the following statements is incorrect?

When testing the average transmit optical power of an optical interface, which of the following descriptions are incorrect?

In order to ensure the traceability of users and the refined QoS control management based on users and services, Internet services are planned using PUPSPV (per user, service, and VLAN), and the attributes of SVLAN on the OLT are recommended to be configured. For what kind?