Does an ELB have an IP address?
No, it has a DNS name
Alias Record vs CNAME
Alias Record like a CNAME, but it resolves to individual AWS resources and accepts naked domain names
Routing Policies
Simple, Weighted, Latency, Failover, Geolocation
Simple use case
single webserver
Weighted use case
A/B testing
Latency use case
quickest performance
Failover use case
Prod and a DR site
Geolocation use case
European customers use Euros, US customers use US dollars