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.
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。
Also, fast Ethernet is hampered by distance limitations: Its copper interfaces only support distances of 100 meters between an end-station and a repeater, and 10 meters between Repeaters.
同时，快速以太网也受距离的限制：铜线接口只支持终端站与中继器之间100米、中继器之间10米。
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