What key points (ipv4) need to be pinged to monitor internet connectivity?

Question

Computer networks

From Moscow. Yes, and in general from the Russian Federation.
For example, today something Google periodically goes offline. At the same time as me, another person from another city (in the Russian Federation) has the same picture.
Blocking is definitely not to blame, tk. ping is bypassed.

Answer 1

DNS сервера провайдеров. Но пинг не гарантирует подмены.

Answer 2

In general, there are no beacons on the Internet, the answer from which would guarantee that "Everything is calm in Baghdad."
You can choose the DNS server of major market players such as Google. But the indicators in case of problems will be average for the hospital (it’s not clear if Google is dead, if your provider’s admin got drunk). You can pervert by building ascending chains.

Answer 3

Root DNS as an option.