Useful terminologies used in AWS Route 53
Types of DNS Record
A: Domain/Hostname to IPv4
AAAA: Domain/Hostname to IPv6
CNAME: Domain/Hostname to hostname
Alias: Domain/Hostname to AWS Resource
CNAME: Only for non root domain (something.mydomain.com)
Alias: Works for Root and Non Root Domain (mydomain.com). It is free.
DNS TTL
TTL stands for “Time to Live” and it refers to how long your DNS settings are supposed to be cached before they are automatically refreshed. Record will cached on your system for specific amount of time.
High TTL(e.g. 24 hr)
Less traffic on DNS
Possibly outdated records
Low TTL(e.g 60 s)
More traffic on DNS
Records are outdated for less time
Routing Policy:
We can manage the traffic by applying the policies in Route 53.
Simple
Weighted
Latency
Health Checks
Failover
Geolocation
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