We are planning to build in 2022; the planning begins

I don’t understand the mix either, but Cat6 is more practical for outlets, Cat7 would no longer be Western and thus less compatible (the cables are not affected by this problem).

"...Today’s GG45 is a 2-in-1 solution, since the GG45 socket (but not the plug) is backward compatible with RJ45. Thus, conventional RJ45 plugs can be used in new GG45 environments (network outlets, patch panels). Conversely, it is not possible to use the GG45 plug in an RJ45 socket. However, in the backward-compatible operating mode, the connection does not achieve its full performance but only a bandwidth of 500 MHz corresponding to . The weakest link in such a chain is then the Cat-6A patch cable and thereby determines the overall performance..."

rdwlnts was faster though.

CAT 8 sockets are again of the RJ45 type. Can they also be used with Cat 7 cables? Cat 8 cables are not recommended due to the extra cost and the difficult installation (quite stiff).

Doesn't look bad in terms of quantity. Only you can know if the sockets will be enough for you. Better to have 2 too many than 1 too few. Junction boxes fit for standard ceiling lamps, but if you want spots, strips, wall lamps, then of course not. I don't understand the Cat 6 and Cat 7 mix. I would have everything done in Cat 7.

I assume it's a typo. Ceiling spots will go in the entrance area, bathroom, guest toilet, possibly kitchen. It should all be Philips Hue. Duplex cable is fiber optic?

Duplex cable is fiber optic?

No, duplex means two parallel cables, so double cables combined into one cable. Basically, pulling in 1 cable over 2 CAT 7 cables, to be happy.

No, duplex are two parallel lines, so double lines that are combined into one cable. Basically pulling in 1 cable consisting of 2 CAT 7 cables.

And what is the advantage of that?

Is the question serious? Two ports. Two devices at the same time without a switch.