====== EC2 (Elastic Compute Cloud) ======

**What it is:** A virtual server (compute instance) you run in AWS.

**What it’s for:**
  * Run web apps, APIs, background jobs, custom software.
  * Full control over OS and runtime (like a VPS, but scalable).

**Key ideas:**
  * You choose:
    * [[aws:compute:ec2:instance-type|Instance Type]] (CPU/RAM/network)
    * [[aws:compute:ec2:ami|AMI]] (OS image)
    * Network placement (VPC/subnet, security groups)
    * Storage (EBS volumes)
  * Access is typically via SSH (Linux) or RDP (Windows).

**Exam cues:**
  * “need full OS control” → EC2.
  * “lift-and-shift a traditional server app” → EC2.

**Hard words (English + IPA + Vietnamese meaning):**
  * *elastic* /ɪˈlæstɪk/: co giãn
  * *compute* /kəmˈpjuːt/: tính toán
  * *instance* /ˈɪnstəns/: máy ảo (phiên bản chạy)
  * *runtime* /ˈrʌnˌtaɪm/: môi trường chạy