当采用快速以太网或千兆以太网时，铜缆和光缆具有相同的传输速度。
When Fast Ethernet or Gigabit Ethernet is used, the same transmission speeds are realised on copper and fibre optic cables.
如何构造适应视缆树形拓扑的以太网数据链路层，是本文论述的重点。
This paper is mainly concerned with the way how to construct a data link layer which is adaptable to Ethernet of tree topological in TV cable.
如何构造适应视缆树形拓扑的以太网数据链路层，是本文论述的重点。
This paper is mainly concerned with the way how to construct a data link layer which is adaptable to Ethernet of tree topological in TV cable.
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