Specification: Weaker variant of https://tools.ietf.org/html/rfc8020. NXDOMAIN answer in unsigned zones does not allow other data at names which generated the NXDOMAIN answer.
Expected advantage: Better cache efficiency and resource consumptions for operators, better latency for end users.
Expected disadvantage: None
Expected implementation complexity for software developers: Small
Expected non-compliance: ? TBD. Some of known big offenders like Akamai already fixed their setups but more data is needed.
Specification: Weaker variant of https://tools.ietf.org/html/rfc8020. NXDOMAIN answer in unsigned zones does not allow other data at names which generated the NXDOMAIN answer.
Expected advantage: Better cache efficiency and resource consumptions for operators, better latency for end users.
Expected disadvantage: None
Expected implementation complexity for software developers: Small
Expected non-compliance: ? TBD. Some of known big offenders like Akamai already fixed their setups but more data is needed.
Research to confirm assumptions: TBD