>>106958545
>>106958574
SFP is a more "barebones" protocol than ethernet, so it's lower latency and considerably lower power. It's designed to be modular. There are multiple different transceivers that you can slip into an SFP port depending on what you're doing. SFP also has much higher top end speeds (with the hardware behind it), than ethernet. Ethernet currently caps out at 10Gb. SFP can go into the hundreds, but most stuff talked about here is 10 and 25Gbe, occasionally 40 (which is 4x10).
The most basic is direct attach copper/cable. DACs come in two varieties, passive and active. For short distances you don't need any kind of boosting hardware, and a passive cable is literally just hard linking two SFP ports together. Because the protocol is more barebones, this uses practically no power (think milliwatts) and is exceptionally low latency. Active DACs draw power from the SFP port to run boosting hardware to drive the signal over medium distances. It's still low latency, but not as low.
Fiber optic transceivers let you convert SFP to fiber connections. There are a wide variety of these. This still uses less power than RJ45, and they can send data very long distances depending on the optics used. Low power is a few hundred meters, and high power can go hundreds of km.
You can also get transceivers that convert SFP to RJ45. This is generally not advised because anything but very new ones are going to draw quite a bit of power, and will run very hot without a lot of airflow as a result.
There are other formats to. You can get MOCA adapters that convert to coaxial cable, and there's even stuff like the WAS-110 which speaks XGS PON and can be used to bypass ISP ONT equipment (nice if you have ATT because their equipment is absolute shit). It's literally an embedded microcomputer with a dual core, a gig of RAM and a flavor of openWRT installed on it that fits into and is powered off of a standard SFP+ port. https://pon.wiki/xgs-pon/ont/bfw-solutions/was-110/
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>>106381911
>Not even enterprise customers get 25GbE or 40GbE over copper.
DACs are a thing. Copper is fine (and arguably even preferable) over short distances. The majority of my rack is done with copper, and I only use 25 and 40Gbit nics between machines.
I do agree that you won't see residential stuff jumping away from ethernet anytime this decade (and probably the next).
>>106383004
Ahh I guess you addressed that. Well I'll leave it in the message regardless.
What's going to kill any attempt to transition off of ethernet is PoE. PoE is the backbone of fucking everything these days. Consumers are buying PoE cameras. Everyone (including people building luxury homes) want increasingly hungry and ridiculously fast wireless access points. Some of the cameras have lights that can make the camera draw upwards of 20 watts now. Some of the newer access points can draw upwards of 40 because they're either trying to run 3 sets of 4x4 MIMO antennae, or doing absolute clownfuck stuff with directional equipment and running dozens of antennae to filter out background noise.
>Not even enterprise customers get 25GbE or 40GbE over copper.
DACs are a thing. Copper is fine (and arguably even preferable) over short distances. The majority of my rack is done with copper, and I only use 25 and 40Gbit nics between machines.
I do agree that you won't see residential stuff jumping away from ethernet anytime this decade (and probably the next).
>>106383004
Ahh I guess you addressed that. Well I'll leave it in the message regardless.
What's going to kill any attempt to transition off of ethernet is PoE. PoE is the backbone of fucking everything these days. Consumers are buying PoE cameras. Everyone (including people building luxury homes) want increasingly hungry and ridiculously fast wireless access points. Some of the cameras have lights that can make the camera draw upwards of 20 watts now. Some of the newer access points can draw upwards of 40 because they're either trying to run 3 sets of 4x4 MIMO antennae, or doing absolute clownfuck stuff with directional equipment and running dozens of antennae to filter out background noise.