ROUTE 53

DNS works on 53 port

dns record type

ns - name server a - address cname - canonical name -- ???

alias record - ??? SOA records - ?

routing policies

Simple routing policy One recoded with multiple IP. Return all values in random order
Weighted routing policy – Use to route traffic to multiple resources in proportions that you specify. We can use health check for records You can set up SNS notification when health check is fails

Failover routing policy Use when you want to configure active-passive failover.

Geolocation routing policy Use when you want to route traffic based on the location of your users. Geoproximity routing policy
Use when you want to route traffic based on the location of your resources and, optionally, shift traffic from resources in one location to resources in another location. traffic flow ??? bias ???

Latency routing policy Use when you have resources in multiple AWS Regions and you want to route traffic to the Region that provides the best latency.

Multivalue answer routing policy Use when you want Route 53 to respond to DNS queries with up to eight healthy records selected at random. Check health and return only if it passed

IP-based routing policy Use when you want to route traffic based on the location of your users, and have the IP addresses that the traffic originates from.