DNS Database


  • the database records used in the zone file are called standard resource records or just RRS 
  • format:

        [name] [ttl] IN type data 


Note


[name] 

   can be individual host or an entire domain

[ttl] 

   time-to-list, duration of connection

IN 

   either HS, CH, IN (internet server)

Type 

   type of resource record

  • A - address, maps a hostname to an address
  • NS - identifies a domain's name server
  • CName - cononical name, alias for a hostname
  • MX - defines a mail server