Split DNS is used to maintain what for external and internal networks?

• A. It relies on DHCP instead of DNS
• B. It maintains separate DNS namespaces for external and internal networks.
• C. It blocks DNS queries at the firewall.
• D. It uses the same DNS data for both external and internal queries

Answer: (B)

Split DNS centers on having two separate DNS namespaces for external and internal networks. This means internal clients resolve internal hostnames using a private internal zone, while external queries are answered from a different zone that exposes only public-facing names and addresses. This separation keeps internal network details hidden from the outside and lets you present different, appropriate records to each side. It isn’t about DHCP, nor about blocking DNS at a firewall, nor about sharing the same DNS data for both sides—the whole point is to maintain distinct, appropriate namespaces for internal and external queries.