✅ AWS CLF-C02 Cheat Sheet – Certified Cloud Practitioner
☁️ 1. Cloud Concepts
- Cloud computing benefits: Agility, Elasticity, Cost savings, Global reach, Scalability.
- Cloud models:
- IaaS – EC2 (control over OS & network).
- PaaS – Elastic Beanstalk (focus on code).
- SaaS – Amazon WorkMail (fully managed).
- Deployment models:
- Public Cloud (AWS), Private Cloud (on-prem), Hybrid (combination).
- Global Infrastructure: Region → AZ → Edge Location.
🔒 2. Security & Compliance
- Shared Responsibility Model:
- AWS: “Security of the cloud” – hardware, regions, AZs, networking.
- Customer: “Security in the cloud” – data, IAM, encryption.
- IAM (Identity & Access Management):
- Users, groups, roles, policies (JSON).
- Use MFA, least privilege, roles for EC2.
- Encryption:
- At rest (S3, EBS) and in transit (TLS).
- AWS KMS for key management.
- Compliance tools:
- AWS Artifact (compliance reports)
- AWS Config (track resource config)
- Amazon Inspector (vulnerability scans)
- GuardDuty (threat detection)
⚙️ 3. AWS Core Services
- Compute:
- EC2 – virtual servers
- Lambda – serverless functions
- Elastic Beanstalk – deploy code fast
- Auto Scaling – adjust capacity dynamically
- Storage:
- S3 – object storage
- EBS – block storage (for EC2)
- EFS – shared file system
- Databases:
- RDS – relational (MySQL, Postgres)
- DynamoDB – NoSQL
- Redshift – data warehouse
- Networking:
- VPC – isolated virtual network
- Route 53 – DNS
- CloudFront – CDN
- NAT gateway / Internet gateway
💵 4. Billing & Pricing
- Pricing models:
- On-Demand – no commitment
- Reserved – 1/3 year discount
- Spot – cheapest, interruptible
- Savings Plans – commit to spend/hour
- AWS Free Tier:
- 12-months (e.g. EC2 750 hrs), always-free (e.g. Lambda 1M requests).
- Billing tools:
- Billing Dashboard – view charges
- AWS Budgets – alerts
- Cost Explorer – analyze trends
- Pricing Calculator – forecast costs
- Consolidated Billing:
- Multiple accounts, 1 invoice, volume discounts.
📊 5. Support & Architecting
- Support Plans:
- Basic – free, billing only
- Developer – email, during hours
- Business – 24/7, AWS Trusted Advisor
- Enterprise – TAM, Concierge
- Well-Architected Framework:
- 5 Pillars: Operational Excellence, Security, Reliability, Performance Efficiency, Cost Optimization
💡 Tips & Memory Triggers
- “S3 is for objects, EBS is for blocks, EFS is for sharing.”
- “KMS = keys, IAM = users, MFA = extra lock.”
- “Lambda = no servers, EC2 = your servers.”
- “Trusted Advisor = AWS best practice coach.”
- “CloudFront = cache + speed at edge locations.”
✅ Use this to rapidly revise before the test! Focus on how services are used, who is responsible for what, and pricing scenarios.