AWS Quick Reference — High-Yield Exam Facts

Must-know service summaries:

EC2 — virtual servers; IAM — access management; S3 — object storage; RDS — relational DB; DynamoDB — NoSQL DB; Lambda — serverless functions; CloudFront — CDN; Route 53 — DNS; VPC — virtual network; CloudTrail — API logging; CloudWatch — monitoring

Key exam facts:

Root account: enable MFA immediately, don't use daily

S3 durability: 11 9s (99.999999999%)

Shared responsibility: AWS = of the cloud; Customer = in the cloud

IAM is global; most services are regional

Availability Zone = one or more data centers

Edge location ≠ Availability Zone

CloudTrail = who did what; CloudWatch = metrics and logs

Security Group = stateful; NACL = stateless

Reserved Instance = 1 or 3 year commitment

Spot Instance = up to 90% off, can be interrupted

On-Demand = pay per second/hour, no commitment

S3 Glacier = archive; S3 Standard = frequent access

EBS = block storage for EC2; EFS = shared file storage

SNS = push to many; SQS = queue for one consumer

Reference:

Wikipedia: AWS

https://en.wikipedia.org/wiki/Amazon_Web_Services