How to extend network to outbuilding

[Toweliechaos]

So I've just discovered that I have a working network socket (hiding in the back of a cupboard) in my summer house. I currently have a TP-Link wi-fi extender in the summer house that provides fairly limited wifi speed (e.g. at best 12mb when the house gets 50mb)

I'm on vodafone pro and already have 3 extenders in the house to provide full coverage. What can I do to make use of that network socket in the summer house to provide more than one socket (i.e. switch) and also supply the wifi signal from the main router so I get full speeds? I have a spare modem and router or two that I could repurpose. 

All help much appreciated.

I used to know all this stuff, but I've not worked in IT for years now so I'm well out of the loop.

[Toweliechaos]

Did you not read the OP? I am using a TP-Link powerline wifi repeater.

[Cynric]

@Toweliechaos  If this "Did you not read the OP? I am using a TP-Link powerline wifi repeater." was in reply to my comment, then just go back to the first post where no mention of powerline was made.

I'm quite happy to help someone, but being snapped at doesn't help.

[Toweliechaos]

I will have a look at my old routers. I have a feeling they will be locked down though and not have those sort of options. Failing that, I can always source a cheap router.

[CrimsonLiar]

Please you don't need to school me on this.  Your original post just stated a WiFi extender, not the powerline version.  I'm well versed in using TP-Link powerline WiFi extenders, I've used one myself, it worked superbly, and I've recommended to some people on here that they try them.

From experience if you take the Powerline WiFi transmitter and connect that to the working ethernet port (you don't need/want the other powerline device connected to the router), it will quite happily work as a wired Access Point - a very handy tool if you are setting up networks from a laptop and you are too lazy (like me) to switch to the SSID of the network you are trying to set up!