this post was submitted on 04 Aug 2025
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You also lose the option of PoE with fiber, although TBH in all my years I've never used it.
I'm just bitter because I bought a big roll of Cat6 a couple years ago and it cost an arm and a leg. The same length of multimode fiber would have been a fraction, and I'd probably get better speeds.
If you're forward thinking for future speed generations you definitely should go with singlemode fiber, by the way. Multimode is mostly done at 10Gbit/s as far as I know. There are some things like 40G and 100G SR4, over multimode but they use 4 fibers in each direction. Whereas I have personally installed 100G bidirectional lines already on singlemode over 10 km already, that's easily commercially available (though it would be ridiculous for home use).
I think the price difference between 10G single mode and 10G multi mode gear has also decayed enough that taking the step up to singlemode is no big issue anymore.