Computer-A could infact be a hub or a switch, but you still have the problem of Computer-B's and Computer-C's TX and RX ports being wired together. Ethernet splitters are not mini-hubs. They are specifically designed to split a single connection with four twisted pairs into two connections with two distinct twisted pairs. Cat.5e and even Cat.7 cables regularly come as UTP, and when these get bundled you will have individual pairs just a mm from each other, and splitters like these are seen (as devices or 4+4-Wire use of old cable plant at the patchbay) used in professional installations. If you just want to know how to split Ethernet connections, though, you’ve come to the right place. Here’s everything you need to know about Ethernet splitting. Ethernet Splitters 101

Most Ethernet splitters work by taking an input signal and dividing it into multiple output signals. On a two-way splitter, each output has half the normal strength as the signal is divided by two. But this is not how Ethernet signals work. Ethernet couplers are devices used to connect ethernet cable connections from one type to another. There can be various reasons to use a coupler such as to extend network cabling, split a signal allowing for two cables to be connected to a single port or to allow for different network cable types to be connected. Types of Ethernet Couplers Twisted pair Ethernet, 10base-T, 100base-TX, 1000bast-T, etc. all need to be connected end-to-end. At each there is a transmission (TX) pair, and reception (RX) pair. This is how a cross-over cable works. You can mitigate this problem by enhancing your network. Using a router that supports 2.5 Gbps, or even 10 Gbps Ethernet is a good start. Pair that with Cat 6 or newer Ethernet cables that support that kind of high-speed networking with adequate shielding to protect the sanctity of your data. Even if you end up splitting that high-speed connection between devices, it’s at least fast enough that no one should feel like they’re missing out by sharing the total throughput. To get around that problem, you can use an Ethernet splitter, or rather, an Ethernet switch. These devices can take a singular incoming Ethernet connection and make it accessible to multiple users at the same time. This not only expands the number of available Ethernet connections for waiting devices but makes running the Ethernet cable much easier since you needn’t have multiple cables going around doors and through walls: just run one cable, with a splitter on the end.

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It's not a "splitter" per se, and shouldn't be marketed as one. It would be better to call it a "cable sharer". Instead of a splitter, your best option is to add a mini-switch, but you need to be careful with your wiring topology if you already have multiple other switches in your network.

All ethernet devices on one network are connected together, in this simplest way. All terminals must be connected to the same network wire. The main cost issue that a person might face while firing up a new line is maybe the cost of the new cable, be it a CAT 5e cableor a CAT 6. To another small business owner, it might be the infrastructure cost of installing the long line copper clad wire into the ceiling or the wall. Ethernet splitters typically are used for connecting different computer or other networking devices. How to use Ethernet splitter? The details will be illustrated in this section. Please move on. Mainly differing in how many ports they have. Couplers may have between one and six ports, allowing them to connect up to six cables at one time. They can also differ in their wiring configuration and there are many different types of couplers, from in-line connectors to junction boxes, depending on what you need to convert between. Every ethernet network connects terminals via a splitter, so to speak. A splitter is just a parallel configuration of devices.

The biggest downside to using an Ethernet adapter is that even with the fastest connection speeds, you're still limited to the bandwidth of the single connection from the Ethernet switch to the adapter. That problem is only exacerbated if you connect more devices to that same adapter. As implied by its name, Ethernet splitter can divide a single Internet connection into two. With Ethernet splitter, other devices can share the Ethernet signal. In fact, other devices like Ethernet hub and switch can also help you split Ethernet connection. These devices do that in different ways. You still need 2 free ports on your existing switch/router. Switches/routers only provide one connection per port. Trying to use a splitter to turn one connection into two won't work since that's the job of switches/hubs which clearly, a splitter is not either of. If you attempt to use this two turn one connection into two, I see two possible scenarios: Only one device will receive a connection, or, the port on the switch/router will fail to work properly with both devices connected. RJ45 Ethernet Network Splitter could help to split one network cable to 2 port output, that's convenient to take turns to use different computers. (Please note that cannot support using two cables at the same time) Although those two devices do need to share the overall connection speed of the Ethernet cable that runs between the router and the switch, it’s still far more reliable and stable than Wi-Fi which could see the two devices competing for frequency as much as bandwidth.

As you can see, the TX pins on Computer-A are wired to the RX pins on Computer-B, and similarly, the RX pins on Computer-A are wired to the TX pins on Computer-B. (For simplicity's sake, I have not wired up pins 4,5,7 & 8, but for completeness they should be wired straight through pin 4 to 4, 5 to 5, etc.) Recommended reading: USB Splitter or USB Hub? This Guide to Help You Choose One The Advantages and Disadvantages of Ethernet SplitterFortunately, in most cases, laptops that have exclusively USB-C connections, like several of Apple’s latest generation MacBooks, actually use Thunderbolt or USB4 ports, which provide enough bandwidth for even the fastest of Ethernet connections; You just need the right adapter for the job. Maximum Ethernet Switch speed without the clutter Ethernet cable splitters allow you to run with cable without passing through walls, floors, and ceilings. Even so, you need to prepare two cables. As for Ethernet splitter, they should be used in pairs just as mentioned before.

Typically, you'd need a greater number of cables to change that dynamic, meaning more cables running across the floor or through walls. More cables mean a more complicated setup, especially if you have to retroactively add additional cables. There is another solution though: an Ethernet cable-sharing kit .Although they use different USB connectors, they both offer full USB 3.1 bandwidth, allowing for up to 1Gbps Ethernet speeds for any connected device. This works best in a close-knit office or home environment when the other devices can be relatively close to the device equipped with the Ethernet adapter, although they don’t have to be if you can run long enough Ethernet cables. A splitter works by taking two physical Ethernet ports and sending both connections (which must be limited to using 100mbps speeds) though a single cable. A splitter doesn't connect both ports together in any way. It keeps both ports isolated unlike hubs and switches.