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====== Regional vs Global Services ======

**What it is:** A way to classify AWS services by scope:
  * **Regional services**: exist inside a specific Region.
  * **Global services**: not tied to one Region (work globally).

**What it’s for:**
  * Understand where your resources “live”.
  * Design multi-region architectures correctly.
  * Avoid mistakes like “why can’t I see my resource in another Region?”

**Regional services (typical examples):**
  * [[aws:network:vpc|VPC]] (Region-scoped)
  * [[aws:compute:ec2|EC2]]
  * [[aws:storage:s3|S3]] (buckets are in a Region, even though the name is global-unique)
  * [[aws:database:rds|RDS]]
  * [[aws:containers:eks|EKS]]

**Global services (typical examples):**
  * [[aws:security:iam|IAM]] (accounts/users/roles are global in the account)
  * [[aws:network:route53|Route 53]] (global DNS)
  * [[aws:global:cloudfront|CloudFront]] (global CDN)

**Exam cues:**
  * “I created it in us-east-1 but can’t find it in ap-southeast-1” → it’s regional.
  * “DNS records used worldwide” → global.

**Hard words:**
  * *scope* /skoʊp/: phạm vi
  * *tied to* /taɪd tuː/: gắn với
  * *unique* /juːˈniːk/: duy nhất