Data Harvesting & Devices w/uPnP IP addy

When I see the proof of this Orwellian ** in my router logs, I wonder what the hell is going on...?

So...what? How?? and Why??!

And dude, what the hell is up with this strange 192.168.147.100 existence?  Why can't I check it out and see what is on the page...if there is anything to see...?  I'm curious.

Lastly, thirdly, what is the difference between the DOCSIS/Ethernet choice given in the GUI?