multicast backbone

基本解释

National natural science foundation of China network (NSFCNET) is the first high-speed computer network test bed providing native multicast service across its backbone .
“中国高速互联研究试验网”是我国第一个全网支持非隧道组播协议的下一代高速互联网试验床。
China Education and Research Network (CERNET) construct and realize the multicast based video conference system on CERNET backbone and make it the communication platform for CERNET nodes.
中国教育和科研计算机网（CERNET）在全国主干节点上构建和实现了组播视频会议系统，成为全国教育网各节点的视频会议交流平台。