Vertical and horizontal scaling

EC2 instance types

Purchase options

Dedicated host vs Dedicated instance

Scheduled Reserved instances

Capacity reservations

Spot fleet

Saving plan

Instance Store

Placement groups

EC2 Hibernation root volume requires EBS

EBS volume type - SSD based

EBS volume type - HDD based

Instance Store vs EBS

Encryption

Networking + ENI

Licensing

Private, public, elastic IP

Termination protection

Metadata