Every 20-30 minutes, my internet seems to be unresponsive for about 10 seconds. I can easily see this if I'm running the ping command while it happens:

Now, I have two routers on my network, both broadcasting the same network (with a different SSID).

I have this problem since a few months.

My /etc/hosts file only contains a few 127.0.0.1 mywebsite.dev entries.

So, is this an issue that must be resolved on my Macbook Air 2014 or on the router?