Definition
DNS Security covers methods and mechanisms that protect the integrity, availability and trustworthiness of domain name resolution.
Human Explanation
It helps prevent users from being directed to fraudulent websites and limits manipulation of DNS responses.
Why it Matters
Most Internet services depend on DNS, so its compromise may redirect users to harmful resources or disrupt services.
Conceptual Boundary
DNS Security is not one protocol or technical product. It includes several mechanisms that protect the complete name-resolution process.
Practical Perspective
Even a well-protected application may be bypassed if a user is directed to a fraudulent server.