Route53

Route53

1. DNS

   • Domain to IP
   • Top Level - .com
     • Second - .co.uk
   • Domain Registrars
   • SOA Record
     • Admin of Zone & Server that supplied data
   • NS Records
     • TLD to direct to DNS Server
   • TTL
   • CName
     • Canonical Name. Domain to another
   • Exam tips
     • ELB no IPv4. Alias.
     • Charge for CName, not Alias. Choose Alias.
     • Alias acts as CName
   • Alias Record (AWS)
     • Like CName
       • A record to ELB
       • Not Zone Apex to CName
         • Only example.com, not www

2. Lab

   • General
     • Global service
     • Register domain
       • Need NS and SOA
     • Routing Policies
       • Simple
         • User -> R53 -> EC2
       • Weighted
         • User -> R53 -> Weight % to ELBs -> Server
       • Latency
         • User -> R53 -> Lowest latency route
       • Failover
         • Active/Passive Sites (HealthCheck)
       • Geolocation
         • Euro -> Route53 -> EC2 in Euro