问题详情

A Next Generation Network(NGN) is a (上题选择) network ,which is able to provide Telecomunication Services ti users and to make use of multiple broadband, QoS-enable transport technologies and in which service-related functions are () of the underlying transport-related technologies.

A.dependent

B.independent

C.related

D.depend

请帮忙给出正确答案和分析，谢谢！