一台路由器连接3个以太网
When you are setting up new Ethernet cables for your computers, is it possible to get twice the punch for each cable? Is it wise to even try it or should you look into an alternative hardware solution? Today’s SuperUser Q&A post has the answer to a curious reader’s question.
在为计算机设置新的以太网电缆时，是否可以使每根电缆的打Kong次数增加一倍？ 尝试一下是否明智？还是应该考虑使用其他硬件解决方案？ 今天的“超级用户问答”帖子回答了一个好奇的读者的问题。
Today’s Question & Answer session comes to us courtesy of SuperUser—a subdivision of Stack Exchange, a community-driven grouping of Q&A web sites.
今天的“问答”环节由SuperUser提供，它是Stack Exchange的一个分支，该社区是由社区驱动的Q＆A网站分组。
问题 (The Question)
SuperUser reader Ravenix wants to know if it is possible to run two Ethernet connections over the same cable:
SuperUser阅读器Ravenix想知道是否可以通过同一根电缆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 connections interfere with each other or work without issues?
是否可以使用一根Cat5(4对双绞线)电缆并将其拆分为两个以太网端口？ 我知道以太网只需要4条线，这样就不会有问题，但是连接会相互干扰还是可以正常工作？
Is it possible to run two Ethernet connections over the same cable?
是否可以通过同一根电缆运行两个以太网连接？
答案 (The Answer)
SuperUser contributors Tetsujin, Journeyman Geek, and Andre Borie have the answer for us. First up, Tetsujin:
超级用户贡献者Tetsujin，Journeyman Geek和Andre Borie为我们找到了答案。 首先，Tetsujin：
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.
是的，它会起作用，尽管它将限制为100 Base-T速度。 但是，对于两个分离器的价格以及每端都需要的额外电缆，您可能会得到便宜的以太网交换机，并保持1000 Base-T的速度。
Followed by the answer from Journeyman Geek:
随后是Journeyman Geek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.
它有可能降到10种Base-T速度。 在我看来，完全值得购买以太网交换机。
With our final answer from Andre Borie:
随着我们对Andre Borie的最终回答：
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.
您可以使用VLAN，并为每个“电缆”分配一个VLAN号，以便设置为特定VLAN的计算机只能看到标有该VLAN号的数据包，以及使用标准(非管理型)交换机将电缆拆分为多个端口的信息。
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.
您还可以使用管理型(企业级)交换机，该交换机可以自己处理VLAN，并将每个VLAN分配给特定端口。 这样，计算机就不需要任何配置，并且由于计算机不会收到属于相邻VLAN的任何数据包，因此更加安全。 在第一种情况下，数据包仍然到达两台计算机，因此，如果它们中的任何一个都是“邪恶的”，它们仍然可以侦听相邻VLAN的流量。
Have something to add to the explanation? Sound off in the comments. Want to read more answers from other tech-savvy Stack Exchange users? Check out the full discussion thread here.
有什么补充说明吗？ 在评论中听起来不错。 是否想从其他精通Stack Exchange的用户那里获得更多答案？ 在此处查看完整的讨论线程 。
Image Credit: tlsmith1000 (Flickr)
图片来源： tlsmith1000(Flickr)
翻译自: https://www.howtogeek.com/286530/is-it-possible-to-run-two-ethernet-connections-over-the-same-cable/
一台路由器连接3个以太网