this post was submitted on 18 Dec 2024
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If you have only one device on Wi-Fi, multiplexing turned off, or especially if you have MU-MIMO support, Wi-Fi can be faster than a single wired connection. It is still higher latency and subject to other drawbacks such as security and power consumption, but of course it offers advantages that can outweigh the disadvantages depending on use case and user needs.
That said, it's technically not faster than the cable, but rather faster at the data link or network layer. For example, CAT8 physically supports up to 40Gbps, but most consumer and even professional electronics only support up to 2.5Gbps. Only really enterprise level switches can push up to like 100Gbps onto copper, and even then that's using QSFP transceivers, not RJ-45 connections. Fiber cables regularly push 400Gbps.