Mike wishes to secure his internal DNS from being queried by external users. What DNS design technique employs distinct DNS servers for internal and external use, providing potentially different DNS responses to users of those respective networks?

A split-horizon DNS setup involves setting up separate DNS servers for two or more environments, ensuring that each environment receives DNS information relevant to the DNS view their clients should receive. Domain Name System Security Extensions (DNSSEC) is a set of DNS security standards designed to safeguard DNS data. "DMZ", "DNS" and "DNS proxying" are not established design patterns or widely used terms in either the security or networking fields.