In the UA5000 chassis of the high-density PVM main control, which command needs to be used when configuring the chassis connection?

Which of the following descriptions of MUX vlan characteristics is correct?

Is the following description correct? EPON data packets are variable length. The GPON downstream frame is of fixed length.

Is the following description correct? The link layer defines electrical and mechanical processes and functions to activate, maintain, and remove lines when the systems at both ends are connected.

Regarding MIB, which of the following descriptions is incorrect?