Scroll thru this sub for some recommendations, but DO NOT get a D3.0 modem! ISPs are phasing them out, and Xfinity probably won’t even let you add it to your account.

Check out the Arris SB8200 or the S33.

And check with your ISP (they have a supported modem list on their website) before you buy anything…

Nobody actually uses Cat8, not even datacenters (we just use fiber or DAC). The wiki article says it was designed for it, but it’s less reliable, has more overhead, and is more power hungry, so it never caught on.

I’ve never used keystones on the camera end, just terminated into a male RJ45, and right into the camera.

I’ve done it both ways on the NVR side. If the NVR will be wall mounted, I usually go male RJ45 and right into the NVR. If the NVR is going in a rack and some cable management panels are available, I’ll usually use keystones on a patch panel, and patch into the NVR, but not always.

As others have said, there’s no SOP for this.

In general though, it’s “best” to use keystones on solid core cable and male RJ45 ends on stranded, but I’ve done it the other way thousands of times and never had any issues. Ya gotta do what ya gotta do.