DNS & Infrastructure
DNS resolution, record types, nameservers, and the protocols that power domain name lookups.
DNS (도메인 이름 시스템)
Hierarchical naming system that translates domain names into IP addresses.
네임서버
Server that stores DNS records and responds to DNS queries for a domain zone.
A 레코드
DNS record mapping a domain name to an IPv4 address.
AAAA 레코드
DNS record mapping a domain name to an IPv6 address.
CNAME 레코드
DNS record that creates an alias from one domain name to another canonical name.
MX 레코드
DNS record specifying the mail server responsible for receiving email for a domain.
TXT 레코드
DNS record holding arbitrary text data, commonly used for email authentication and domain verification.
NS 레코드
DNS record that delegates a DNS zone to an authoritative nameserver.
DNS 리졸버
Software or service that performs recursive DNS lookups on behalf of clients.
DNS 캐시 (TTL)
Temporary storage of DNS query results with a Time-To-Live expiration.
권한 있는 DNS 서버
Server that holds the original DNS records for a zone and provides definitive answers.
DNS 존 파일
Text file describing a DNS zone with records for all domains in that zone.
SOA 레코드
Start of Authority record containing administrative information about a DNS zone.
서브도메인
Domain that is part of a larger domain, created by prepending a label (e.g., blog.example.com).
IP 주소
Numerical label (IPv4 or IPv6) assigned to each device connected to a computer network.
재귀 DNS 리졸버
Server that performs the full DNS resolution chain on behalf of clients and caches results.
DNS 루트 서버
Top-level nameservers that direct resolvers to the correct TLD nameservers.
DNS 존
Administrative partition of the DNS namespace managed by a single authoritative authority.
PTR 레코드 (역방향 DNS)
DNS record that maps an IP address back to a hostname for reverse DNS lookups.
DNS 위임
Transfer of DNS authority for a child zone to designated nameservers via NS records.
DNS 라운드 로빈
Load-balancing technique using multiple IP addresses on a single hostname to distribute traffic.
DNS 싱크홀
DNS configuration that redirects malicious domains to a controlled IP to block or analyze threats.
EDNS (DNS 확장 메커니즘)
RFC 6891 extension to the DNS protocol enabling larger messages, DNSSEC, and new option codes.
DNS 증폭 공격
DDoS technique exploiting open DNS resolvers to flood a victim with amplified response traffic.
네거티브 캐싱 (NXDOMAIN)
Caching of NXDOMAIN and NODATA DNS responses to prevent repeated queries for non-existent names.