Introduction to Dockers

Question 1

What are the server administration models?

Answer 1

Without virtualization, with virtualization and with containers.

Question 2

What is without virtualization?

Answer 2

Applications run directly on a server’s OS, leading to compatibility issues and difficulty in moving applications to other servers.

Question 3

What is with virtualization?

Answer 3

Uses a hypervisor to create virtual machines (VMs) with their own OS. VMs can be packaged and moved, but they are heavyweight and have longer lifecycles.

Question 4

What is with containers?

Answer 4

Containers package applications with their dependencies, allowing them to run consistently across environments. Containers share the host OS kernel, making them more lightweight and portable than VMs.

Question 5

What is a container?

Answer 5

A container packages software code and dependencies so it can run quickly and reliably from one computing environment to another.

Question 6

What’s the difference between Containers and VM’s?

Answer 6

Unlike VMs, containers do not include a full OS. Instead, they share the host OS kernel, making them faster, more lightweight, and more portable.