Technical Standards
RFCs, internationalized domain names (IDN), Punycode, RDAP, and related standards.
RDAP（注册数据访问协议）
Modern, structured replacement for WHOIS using JSON over HTTPS.
EPP（可扩展配置协议）
Protocol for registrar-registry communication to manage domains.
IDN（国际化域名）
Domain name containing non-ASCII characters from various writing systems.
Punycode
ASCII encoding for internationalized domain names (xn-- prefix).
TTL（生存时间）
DNS record value specifying cache duration in seconds.
Anycast DNS
Network method routing DNS queries to the nearest of multiple servers.
DNS-over-HTTPS (DoH)
Protocol encrypting DNS queries over HTTPS for privacy.
DNS-over-TLS (DoT)
Protocol encrypting DNS queries over TLS on port 853.
数据托管
ICANN-required backup of registration data with a trusted third party.
DNS 传播
Time for DNS changes to spread across all resolvers worldwide.
通配符 DNS 记录
DNS record using * to match all undefined subdomains.
粘合记录
A/AAAA record in parent zone preventing circular nameserver dependencies.
RFC（征求意见稿）
IETF formal document defining internet protocols and standards.
IDNA（应用程序中的国际化域名）
Technical framework governing how international characters are validated and encoded in domain names.
WHOIS协议
Plain-text domain lookup protocol on TCP port 43, being replaced by RDAP.
DNS-over-QUIC（DoQ）
DNS encryption over QUIC (UDP port 853), offering lower latency than DoH or DoT.
ECS（EDNS客户端子网）
DNS extension sharing partial client IP with authoritative servers for geolocation-based responses.
TSIG（事务签名）
Shared-secret HMAC mechanism authenticating DNS messages between servers.
AXFR / IXFR（区域传输）
Protocol for replicating DNS zone data from primary to secondary nameservers.
NSEC / NSEC3（DNSSEC 存在否定）
DNSSEC record types cryptographically proving a domain name does not exist.
DNSKEY 记录
DNS record holding the public key used to verify DNSSEC signatures in a zone.
RRSIG 记录
Cryptographic signature record attached to DNS record sets for DNSSEC validation.