Unverified50% confidenceFactExact time
DNS failover refers to configuring multiple records for a domain pointing to different IPs or hosts, together with health checks, so that when the primary node is unreachable it automatically switches to a backup node.
1
Sources
50%
Confidence
Long-term
Relevance
10/14/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedDNS poisoning is a censorship technique in which the local DNS resolver returns an incorrect IP address, redirecting requests to a null address or an interception page.75% similarUnverifiedA PTR record (Pointer Record) is the core resource record type for reverse DNS resolution, pointing an IP address to a domain name.73% similarUnverifiedDNS resolvers cache queried records in memory so that subsequent queries for the same domain name can return results directly without the need for recursive queries again.72% similarUnverifiedExisting domains under a de-accredited registrar are transferred to a vetted receiving registrar through ICANN's registrar transition process, with DNS resolution remaining normal during the transition period.70% similarUnverified任何一个已注册的域名，无论是否配置网站或邮件服务，都必然拥有DNS记录68% similar
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