Depends on lots of things. There are shielded lan cables because electromagnetic interference can induce unwanted noise into your cables. There’s different categories of cables to support various bitrates. For the last 20 years cat 5 has been sufficient, but in the last 10 years we see more cat5e, and lately people are building houses with cat6 or even 7 just to future-proof.
If you have fiber-optic internet, a cat5 cable might be a bottleneck. If you’re at all concerned, get a good shielded cat6 cable and see if you have better speeds or less drops.
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