EC2 Tips/Guides/misc...etc instances.vantage.sh AMI https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ComponentsAMIs.html docs.aws.amazon.com/marketplace/latest/userguide/pricing-ami-products.html#pricing-models-for-ami-products VPC subnet SG(Security Group) How combined with WAF? DDOS? DDoS protection