The traffic of a typical web application directly linked to the amount of concurrent users that use the system. The variations in daily traffic volumes generated by a typical web application match our daily life schedule. Data Traffic transfer, running the application on Amazon cloud, can mean substantial costs. These cloud costs can even amount to more than half the overall charges for all instances utilized for the same amount of time.
The cost of traffic on Amazon AWS stems from two main factors:
1 - Outbound data transfer, between regions as well as out of the Amazon cloud.
2 - ELB data transfer fees across availability zones (AZ).