WIFI works but not the wired connections

Oct 13, 2018
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I had cable internet. I had it connected to my router and then into my cat5e wall jacks in my house. In my closet there is a switch where all of the cat5e cables connect to each room in the house. Everything worked fine.

I decided to switch to fiber internet because it was cheaper. When the tech came, while I was at work, and set it up he just connected the inbound connection (in the closet) to just one of the rooms in the house and set up the router there, bypassing all of the other wired connections. Now only one room has a wired connection. The tech had to know I hard wired everything before why did he change it now?

I tried simply moving the router to where the live connection in the closet is, but it won't make all of the wired connections live in the other rooms. WIFI will work, and if I plug directly into the router in the closet it works, but when I plug the cables for the other rooms into the router they don't work.

If I put a switch before the router and plug every room into the switch, all of the connections in all of the rooms are live (have internet) but not in the same network. If I were to then plug the router into the wall in any of the rooms it works and so does plugging into the router cat5e ports. Again the wired connections just won't be in the same network.

I'm guessing it's my router doing something funny but I can't seem to figure it out. I would like all of the rooms to be connected to the internet and on the same network and be hard wired. What am I missing here?
 
Well the guy moved your wirings. I wish I can draw you a nice picture but this is all I can do, is actually very simple, computer networks are WIRED what we refer to as a STAR topology. One Sun to multiple planets. It SHOULD be in this order:

ISP ---> Modem/router ----> Switch ----> Rooms.