当您为您的计算机设置新的以太网电缆时，每根电缆是否可以获得两倍的费用？试一试是明智的还是应该寻找一个替代的硬件解决方案？今天的超级用户问答帖子回答了一位好奇的读者的问题。

今天的问答环节是由SuperUser提供的，SuperUser是Stack Exchange的一个分支，是一个由社区驱动的问答网站分组。

问题

超级用户阅读器Ravenix想知道是否可以在同一根电缆上运行两个以太网连接：

Is it possible to have one Cat5 (4-twisted-pairs) cable and split it into two Ethernet ports? I know Ethernet only needs 4 wires, so that would not be a problem, but would the connecti*** interfere with each other or work without issues?

是否可以在同一根电缆上运行两个以太网连接？

答案

超级用户贡献者Tetsujin、Journeyman Geek和Andre Borie为我们提供了答案。首先，铁津：

Yes, it will work, though it will be limited to 100 Base-T speeds. However, for the price of two splitters and the extra cables you would then need at each end, you could probably get a cheap Ethernet switch and keep your 1000 Base-T speeds.

然后是熟练工极客的回答：

There is a reasonable chance that it will drop down to 10 Base-T speeds. It is totally worth getting the Ethernet switch in my opinion.

Andre Borie最后的回答是：

You could use VLANs and give each “cable” a VLAN number so that computers set to a particular VLAN would only see packets tagged with that VLAN’s number along with using a standard (unmanaged) switch to split the cable into multiple ports.

You could also use a managed (business grade) switch that could handle the VLANs by itself and assign each VLAN to a particular port. That way, the computers do not need any configuration and it is a bit more secure since the computers would not receive any packets belonging to the adjacent VLAN. With the first situation, the packets still reach both computers, so if any of them are “evil”, they could still listen in on the adjacent VLAN’s traffic.

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