单选题
编号:3726157
1. A Next Generation Network(NGN)is a ( )network, which is able to provide Telecomunication Services to 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.ISDN;dependent
- B.ATM;related
- C.circuit-based;depend
- D.packet-based;independent