Does LAN cable, round / flat, change performance?

Are you thinking short-circuited that you don't need a LAN cable because it's the wireless age? Regardless of the future in which ultra-high-speed 5G will become widespread in earnest, LAN cables are necessary in the current situation where the means to bring Internet lines into the home depends on wired devices such as optical fibers.

You should also pay attention to the shape of the LAN cable (the photo is a Buffalo LAN cable). For example, when connecting an optical network unit (ONU) or an ADSL / VDSL modem to a Wi-Fi router. A LAN cable also connects the router and the concentrator (HUB). Even if you want to use the Internet from the place where you pulled in the line to the place where you sandwich the wall, it is better to extend the LAN cable and install a Wi-Fi router for more stable communication. There are several shapes such as LAN cables, those with a round cross section, and those that are flat like kishimen. The color, length, and price are exactly what you want, so any shape is fine ... no, you should pay attention to the shape as well. The biggest reason is "noise". If you lay a LAN cable in close contact with other LAN cables or power lines of home appliances, it may be affected by noise in a way that adversely affects communication such as slowdown (alien crosstalk). This problem is exacerbated by high speed LAN cable standards such as 10GBASE-T. In order to prevent the influence of noise, it is necessary to introduce a LAN cable (shielded cable) with noise suppression, but the shape of the cable is not irrelevant. Compared to the standard type, which has a round cross section, the flat type has thinner conductors and is more susceptible to noise. Even if you choose the flat type if you want to wire a short distance while being conscious of the aesthetics, if you wire it over a long distance and near other cables, it is better to choose the standard type with perfect noise suppression. ..