Kendrick

DNS server might be unavailable when there is an issue with the DNS servers. This can be due to a problem with the servers or due to a problem with the network. When DNS is unavailable, users will not be able to access the websites that they are trying to access. There are several ways to check if DNS is unavailable. One way is to use the netstat command.

Another way is to use the dig command. If either of these commands returns an error, then DNS is likely unavailable. To test if a specific DNS server is unavailable, you can use the nslookup command. If nslookup is unable to resolve a hostname, then that DNS server is likely unavailable.