Connecting Two Routers via RJ45 Ethernet Cable in Series for Extended Home WiFi Coverage

Hi! I have a problem and I'm already wondering how you can connect the sockets differently, namely I have two routers and an Ethernet cable run through the whole house but it is not connected in every socket, the problem is that at the bottom of the room there is one modem netia spot az he already has a cable for the whole house. I wanted to connect a second router upstairs to have WiFi in front of the house. Single cables are run between the sockets, so I connected the cables (socket outlet) with the colors s where the first router is directly connected. Now in the second socket I put the router and when I turn on the computer on this plugged in (double cables plugged in the same pins) it is either internet in the computer or on the router , how to solve it? I will add an illustrative photo of what it looks like, because I write on the phone and I could write it chaotically. Best regards!

Put swich (network splitter) in place of the computer and connect all cables to it.

So right after the router I put the switch? Is it supposed to look like this? Because I won't connect to each switch socket because I would have to connect 20 of them

You wrote that you have a cable from the router to the computer. There is a wire to the second router that is to act as an AP, so in the place where you have the computer you put the switches and connect 3 wires: from the main router, from the computer and from the second router to act as the AP. If you have any sockets along the way, then you just bridge (connect 1: 1). You place the switch in a place where you want to split the network into more than one computer / router.

Well, so goes the cable from the phone to the router and from the router to the computer, the cable is released at home but on the principle that the plugs from this cable that is released at home need to be connected to the router (the same that goes under the computer) for all the network to be this cable

Your diagram shows that in the place where you have a socket you have 3 wires at the moment? Is that correct or not?

I'll explain again

RJ11 -> Router -> RJ45 -> Computer

Router -> RJ45 (home cable) -> RJ45 (Socket) -> RJ45 (Socket) -> Router

This is a cable that needs to be plugged into the router for the network to spread across the rest of the house


This is the second socket on the other side of the house which is connected in one connector as in the picture with the other socket next to it, as you can see there are two cables on one pin plugged into it and I would like it to hang on the socket from the next picture.

this is the socket on which the router is located

At this point, as I said, you must use switchers that will separate the network. You can't parallel wires because you will have the same effect as now.

So here I connect a switch inside or outside? Because there are probably such and such?

I don't know what you mean by saying:

BRAXTONPL wrote:

switch inside or outside? Because there are probably such and such?

With such short cables, it is best to leave the one from the main router in the socket as it is connected by patchcord to switches and extend the latter and earn RJ45 by connecting it to swicth. Personally, I would drill a small hole in the socket housing to lead the cable outside.
Another solution is to buy a double ethernet socket and connect everything with patchords to a switch. With a home network this will not be a big difficulty.

BRAXTONPL wrote:

Because I won't connect to each switch socket because I would have to connect 20 of them

From one switch socket one cable to one socket! From the second switch socket the second cable to the second socket and so on. If you have 20 sockets, there are twenty cables.

I will buy a switch and I work! Thanks !