Transcription of DNS の仕組みの基本を理解しよう
1 DNS 1 DNS DNS DNS DNS DNS IP IP DNS IP hosts Linux /etc/hosts Windows 2000 Windows \system32\drivers\etc localhost host1 gw www 1 hosts hosts ARPANET hosts ARPANET DNS 1984 hosts DNS DNS hosts 1 1 DNS
2 DNS DNS . 1 2 Name Space DNS IP DNS DNS DNS DNS
3 DNS DNS jp DNS jp DNS co DNS co DNS DNS IP DNS DNS host1 1 DNS 1 FQDN Fully Qualified Domain Name FQDN www FQDN.
4 Web FQDN FQDN DNS 3 DNS 1 DNS DNS delegation DNS DNS 2 4 DNS 2 DNS DNS DNS DNS
5 DNS 1 DNS 1 DNS 1 DNS 1 1 1 DNS 1 1 IP 1 SOA Start Of a zone Of Authority DNS DNS 3 NS DNS DNS A IP Web URL IP DNS A A IP DNS IP PTR DNS 5 SOA DNS
6 3 refresh retry expire TTL NS DNS A IP PTR IP CNAME MX HINFO OS WKS Well Known Services TXT 1 DNS 6 Web IP PTR MX sendmail MTA DNS MX 3 MX MX DNS DNS DNS DNS 7 IP jp DNS DNS
7 Jp DNS IP jp DNS 1 TLD Top Level Domain DNS DNS DNS .com .net .jp DNS DNS DNS 4 DNS DNS 4 DNS 8 4 DNS DNS DNS DNS DNS DNS
8 DNS DNS Recursive DNS DNS Iterative DNS DNS Full-Service Resolver DNS PC Stub Resolver DNS Slave Server DNS DNS DNS PC DNS DNS DNS
9 9 SOA A MX PTR PTR IP 5 DNS . DNS
