在以太网络环境里，复杂的规则制约了集线器的拓扑结构和使用范围。考虑到如今应该没人再对如何使用集线器搭建一个规模巨大的以太网感兴趣了，具体细节姑且不表。
Complex rules limit the topology and the use of hubs in Ethernet networks, but I'll skip those as I doubt anyone still has interest in building a large scale Ethernet network using repeater hubs.
由节点的位置和传输范围确定的无线网络拓扑结构对网络的性能有着重大的影响。
The topology of a wireless Ad Hoc network, which is determined by nodes' positions and transmission ranges, has a significant effect on network performance.
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