Some SNCP protection inversion conditions are default, such as AU-AIS and TU-AIS. Other conditions are optional, such as HP-TIM and HP-SLM. Optional conditions can be flexibly set according to the level of the costume.

Which of the following clock operating modes supports the ITU-TG781 standard? (Multiple choice)

Which of the following layers define the protocols that control the network layer? The protocol for this layer applies to logical links, i.e. end-to-end connectivity between two devices.

Which of the following statements about pointer adjustment are correct? (Multiple choice)

NGWDK adopts LO-L1+L2 triple-extension architecture, in which the L2 layer implements switching based on Ethernet/MPLS-TP, the L. layer implements switching based on ODUk/C, and the L. layer implements switching based on I/O.