ethernet problems

I have contracted a plan of 50 megabytes and it was always wonderful until a few days that out of nowhere I started receiving only 6 megabytes, by cable. With the other devices over WIFI I am doing excellent and I enjoy the adequate speed. I clarify that I did not touch any configuration and the...

Hello, since I built my pc (5 days ago) my ethernet keeps randomly disconnecting for a few seconds. I've tried switching ports on my router but it didn't work. When it disconnects (btw i use ethernet) it lasts for like 3-5 seconds. For some reason, it happens more frequently when I am in a call...