Internet keeps dropping

Hi,

For the past couple of years my iMac's internet has been dropping intermittently - usually when I try to stream something that's of a higher quality.

It's happened on various routers over time, I've never got round to trying to sort it out as the problem becomes bearable for a few weeks at a time then gets worse again - at the moment it's really bad - almost cutting out every few minutes.

To get the internet to work again I have to turn my Wi-Fi off and on again.

When the internet drops out, I'm still connected to the router with full signal but on my Chrome browser it says 'Resolving host'.

I've tried so many things on different websites/forums but no fix seems to work...

Can someone help me finally sort this issue?

If it helps, I've got a Diagnostics report file that picked up the internet dropping.

Many thanks,

Adam