Learning Objectives • Understand Docker client-server architecture • Differentiate between Docker CLI, Daemon, and REST API • Explore Docker Engine configuration • Run first container and understand isolation

Learning Objectives • Master container states (created, running, exited, removed) • Differentiate between docker run, start, stop, rm • Understand graceful shutdown (SIGTERM vs SIGKILL) • Use docker exec for debugging running containers

Learning Objectives • Understand CNF (Cloud-Native Network Function) concept • Run containers in detached mode as background services • Map host ports to container ports • View and troubleshoot container logs • Simulate telecom CNF behavior with NGINX

Learning Objectives • Understand Docker's default networks (bridge, host, none) • Inspect container IP addresses • Test container-to-container communication by IP • Understand limitations of default bridge (no DNS)

Learning Objectives • Create custom user-defined networks • Understand automatic DNS resolution • Enable container-to-container communication by name • Inspect network subnets and gateway

Learning Objectives • Understand image vs. container distinction • Run one-time task containers • View and analyze CNF logs • Re-run existing containers without rebuilding

Learning Objectives • Write Dockerfiles from scratch • Understand FROM, RUN, COPY, CMD, ENTRYPOINT • Differentiate between CMD and ENTRYPOINT • Optimize image size using layer caching • Use .dockerignore for security

Learning Objectives • Understand ephemeral container filesystem limitation • Create and use named volumes • Use bind mounts for host-container sharing • Mount volumes as read-only for security • Backup and restore volume data

Learning Objectives • Write docker-compose.yml files • Define multi-container applications • Understand service discovery (DNS by service name) • Use environment variables and .env files • Scale services and manage dependencies