So the network management system based on SNMP can not manage the backbone efficiently, meanwhile it also reduces the performance of backbone.

不仅无法有效地管理主干网，同时还降低主干网的性能。

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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。

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LMDS network is composed Of backbone network, network operation center, service area base -station system and service area user equipment.

LMDS网络由骨干网络、网络运行中心、服务区中的基站系统和服务区中的用户端设备组成。

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What would have been more interesting is to have the 4G spectrum administered in a similar way to other public utilities, where the actual backbone of the system is administered by one company, and the network providers would buy capacity and transmission from the network pool.

FORBES: UK's 4G Auction Foregoes Innovation For Cash