A.The package diffusion software upgrade task may not include the gateway network element

B.The number of network elements for the package diffusion upgrade task does not exceed 15.

C.The package diffusion software upgrade can only include at most one gateway network element, and the non-gateway network elements in the task must belong to the same gateway network element.

D.Configure activation grouping, gateway NEs and non-gateway NEs cannot be grouped into the same group

A.FALSE

B.TRUE

A.Can be an optical interface

B.Support STM-1 at most.

C.Any rate is supported

D.Must be an electrical interface