quartz/content/notes/dns.md

title	aliases	tags
dns		cosc203

record has four fields

• name
• value
• type
• ttl

meaning of name an value are dependent on type

Types

• A
  • name - hostname
  • value - ipv4 address for the hostname
  • hostname to ipv4 mapping
• AAAA
  • same as A but ipv6
• NS
  • name - domain (e.g., otago.ac.nz)
  • value - hostname of authoritave DNS server that knows how to get the IP address for hosts in the domain
  • used to route DNS queries further along th