DNS records

DNS: distributed db storing resource records (RR)

• Type=NS

  • name is domain (e.g. foo.com)
  • value is IP address of authoritative name server for this domain

• Type=A
  • name is hostname
  • value is IP address

• Type=CNAME
  • name is an alias name for some “cannonical” (the real) name
  • value is cannonical name

• Type=MX
  • value is hostname of mailserver associated with name

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