DNS have an answer that isn't supposed to exist

1. What happens when a DNS server doesn't have the answer?
2. What do DNS answers contain?
3. Why is DNS such a problem?

What happens when a DNS server doesn't have the answer?

If the DNS server doesn't have the IP address, it will return the authoritative name server or TLD name server. The requester will continue this iterative process until it finds an answer or times out.

What do DNS answers contain?

ANSWER: The response DNS message contains one answer containing the name of the host, the type of address, the class, and the IP address.

Why is DNS such a problem?

Typically, DNS errors are caused by problems on the user end, whether that's with a network or internet connection, misconfigured DNS settings, or an outdated browser. They can also be attributed to a temporary server outage that renders the DNS unavailable.