What is VPC? http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_Introduction.html
What is Auto-Scaling? http://docs.aws.amazon.com/autoscaling/latest/userguide/WhatIsAutoScaling.html
What is ELB? http://docs.aws.amazon.com/elasticloadbalancing/latest/userguide/what-is-load-balancing.html