10-Route 53

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  1. DNS: domain name system
    1. dns operates on 53
    2. named after route 66
  1. IPv4 32 bit field - 4 billion different addresses
  1. IPv6 128 bits
  1. top level domain
    1. google.com / .com
    2. be controlled by the internet assigned numbers authority - IANA
  1. domain registrars
  1. Record type
    1. SOA
    2. NS
      1. target to name server
    3. A
      1. address
      2. translate to ip address
    4. CNAME
      1. canonical name
      2. to domain
    5. alias records
      1. within aws service
  1. TTL: time to live
  1. policy
    1. weighted routing policy
      1. control in percent
    2. fallover routing policy
    3. geolocation routing policy
    4. geoproximity routing policy
      1. traffic flow only
    5. latency routing policy
    6. multivalue answer routing
  1. choose alias record over cname 👀
 
11-ELB09-VPC