====== Bucket ======

**What it is:** A top-level container in S3 where you store objects.

**What it’s for:**
  * Organize data by purpose (e.g., logs bucket, uploads bucket).
  * Apply policies, encryption, and lifecycle settings at bucket scope.

**Key ideas:**
  * Bucket name is **globally unique** (across all AWS accounts).
  * A bucket exists in a specific Region.
  * You can enable versioning and default encryption at bucket level.

**Exam cues:**
  * “bucket name already taken” → global uniqueness.
  * “control access to an entire bucket” → bucket policy.

**Hard words:**
  * *globally unique* /ˈɡloʊbəli juːˈniːk/: duy nhất toàn cầu
  * *scope* /skoʊp/: phạm vi