Hi. Just got set up with full fibre today. And using the ethernet cable with red ends.
Can I use any extension ethernet cable as long as its cat 5e or above. So I can get the router back into the living room. As I'm having connection problems in the far off rooms.
I've seen ones on amazon. But making sure it's okay first
the red cable is nothing special just help identify it so yes any ethernet cable 5E or better will do
If you are struggling to get good wifi signals in parts of the house you could consider using Ethernet Powerline Adapters.
https://www.techradar.com/news/the-best-powerline-adaptors
Basically these are units that plug into your mains plug sockets and they send the ethernet signal from your router/smart hub round your mains supply. This means you can plug units in any room using any plug socket and then connect your PC/laptop or other device (that has an ethernet socket). In other words your devices will use cable connection rather than wifi connection. Ethernet powerline adapters are really versatile things. For example I wanted to get a network cable up into my house loft space where I put a CCTV recording box but there was absolutely no way I could do that with the router downstairs in the living room. So I just used Ethernet Powerline Adapters and stuck one into the electric plug socket that I already had in the loft.