What response should be expected from a server after it receives a DNS query?

When a server receives a DNS query, it is expected to provide the requested IP address associated with the domain name in the query. This is the primary function of the Domain Name System (DNS), which translates human-readable domain names (like www.example.com) into machine-readable IP addresses (like 192.168.1.1). This process is crucial for enabling users to access websites and other resources on the Internet using familiar names rather than needing to remember numerical addresses.

When the DNS server successfully resolves the requested domain name, it sends back a DNS response containing the corresponding IP address. If the server does not have the information readily available, it might forward the query to other DNS servers, but its primary role remains to provide the requested IP if it has the data.

Other options do not align with the expected behavior of a DNS server in response to a query. Ignoring the query, sending an ARP request, or redirecting to another server are not standard responses for DNS queries in this context. Instead, the fundamental response is to supply the requested information, which is the IP address.