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DNS 記錄參考
Interactive" data-tooltip="Click any record type to see detailed information and examples." cursor-help> InteractiveDNS 記錄類型的互動式參考工具。
- Command Builder
Description
Syntax Format
Example
Use Cases
TTL Recommendation
Security Notes
Command Builder
DKIM/SPF/DMARC use TXT records at specific subdomains.
dig example.com Anslookup -type=A example.comRoot Zone
The DNS hierarchy starts at the root (.) — 13 logical root name servers (a.root-servers.net through m.root-servers.net) handle queries for top-level domains.
Top-Level Domains (TLDs)
Managed by registries. Examples: .com, .org, .net (generic), .uk, .de (country-code), .app, .dev (new gTLDs). TLD servers delegate to authoritative name servers for each domain.
Authoritative Name Servers
These servers hold the actual DNS records for a domain. NS records point to them. They're the final authority for queries about that domain's records.
DNS Resolution Flow
- Stub resolver checks local cache
- Query recursive resolver (ISP or public DNS like 8.8.8.8)
- Recursive resolver queries root servers
- Root refers to TLD servers
- TLD refers to authoritative name servers
- Authoritative server returns the record
- Result is cached at each level