Answer:
DNS failure
Explanation:
The most likely reason he received that message is that the Domain Name System (DNS) has failed.
Domain Name System or DNS interacts with the protocol "IP", this system translates IP address to a domain name like brainly . com.
We could resolve this issue if we change the browser or if we deactivate the firewall. Also, we can change the Domain Name, even we can use the free company's domain.