If you move your desk a few feet and your Ethernet cable no longer reaches, an RJ45 coupler seems like the easiest fix: plug two cables into a small adapter and you are done. A quality coupler should not noticeably slow your connection, but it does add another physical link that can become a failure point. For a permanent setup, a single longer cable is usually the simpler and more reliable choice.
There are also technical limits to keep in mind. The standard copper Ethernet channel limit is 328 feet (100 meters), including patch cords, so joining two long cables can exceed that distance. A coupler does not reset the limit. Tests by trueCABLE with a Fluke DSX-8000 cable tester found that configurations with three couplers generally passed, though one was a marginal fail, while configurations with four couplers failed. The results are not a universal breaking point, but they show why adding unnecessary joins is a bad idea.
If you only need to connect one PC or console, buy a single cable long enough to reach and leave some slack when routing it. A good Cat5e or Cat6 cable is enough for gigabit speeds. If you already have a cable in place and need to connect multiple devices, a small unmanaged network switch makes more sense than a coupler: a five-port Gigabit model costs around $15, requires no configuration, and gives each device its own Ethernet link. Just remember that a standard switch needs power and a non-PoE model will not supply Power over Ethernet to devices such as security cameras or wireless access points.}smdjson after? Need ensure no extra text. final answer only JSON. But I accidentally added