Cloud fundamentals cheat sheet
Vendor-neutral concepts that support foundational AWS and Azure preparation.
IaaS
Provider supplies infrastructure; customer manages more of the OS, applications and data stack.
PaaS
Provider manages more of the platform so teams can focus on applications and data.
SaaS
Provider operates the application stack; customers primarily configure and use the service.
Shared responsibility
Security duties are divided between cloud provider and customer, and the boundary changes by service model.
Elasticity vs scalability
Scalability handles growth; elasticity dynamically adjusts resources with demand.
High availability
Design to reduce single points of failure using redundancy and fault-domain separation.
Identity & access
Use least privilege, strong authentication, role-based access and controlled privileged identities.
Cost awareness
Right-size resources, remove waste, monitor usage and understand pricing dimensions before optimizing.