Quiz

• Application load balancer which operates at OSI Layer 7 (HTTP/WebSockets)
• Network load balancer which operates at OSI Layer 4 (TCP/UDP)
• Gateway load balancer which operates at OSI Layer 3 (Network)
• AWS region = AWS data center; contains several AZs
• AZ = availability zone
• S3 = simple storage service
  • Stores and serves an infinite amount of objects (docs, img, videos..)
  • Docs are stored in S3 in a bucket
  • Works through HTTP
  • Using Origin Access Identity, content can be restricted s.t. it’s only accessible through CloudFront
• RDS - managed relational database service
• EC2 instances can be configured based on: an instance type that offers certain resources (vCPU, RAM, networking..)
  • Deployed in a specific AZ
• Docker = container engine
• Connection timeout when accessing EC2 via SSH <= security group doesn’t allow traffic on port 22
• Change the instance type in Auto Scaling Group => launch template / configuration
• VPC = virtual private cloud
  • Isolated network slice where we can deploy resources; uses private IPs
• SAAS = software as a service
• PAAS = platform as a service
• IAAS = infrastructure as a service
• FAS = function as a service
• IaC = infrastructure as code

1. What is the purpose of the Dockerfile for Docker?
   1. It contains the input data for a program that runs within a container
   2. It contains all the commands and steps for assembling a Docker image
   3. It contains the output after running a container
   4. Docker doesn't use the Dockerfile