Docker host's IP address by default is 192.168.99.100 - Docker Quiz

Docker - Quiz(MCQ)

Docker host's IP address by default is 192.168.99.100

A)

True

B)

False

C)

Can not say

D)

--

Correct Answer : True

Explanation :

You don’t, they’re different. (“localhost” always resolves to 127.0.0.1 and it’s a very magical IP address.)

If you’re seeing an IP address of 192.168.99.100 you’re probably using Docker Toolbox or Docker Machine, which is running Docker on a Linux VM, and that’s the default IP address of that VM. If you’re using one of these options to run Docker then you have to use the $(docker-machine ip) address, usually 192.168.99.100. If you really want it to be “localhost” then you need to switch to the desktop-based Docker for Mac, or Docker for Windows, or just running Docker directly on your Linux host, as appropriate.

Source : Docker

Recently Updated in Docker Questions

A Docker container is often described as an improvement over what other technology?

A)

DevOps

B)

microservices

C)

cloud computing

D)

virtual machines

Correct Answer : virtual machines

Explanation :

Docker containers are often compared to VMs, as both provide the ability to deploy and run multiple, independent applications on the same physical machine.

Docker containers are less resource intensive, as they provide process-level virtualization as opposed to full OS virtualization provided by a VM, which is one of the reasons the industry has shifted toward containers.

The history of application containerization is intimately tied to which OS?

A)

MacOS

B)

Linux

C)

Windows

D)

Android

Correct Answer : Linux

Explanation : Linux added two features to its kernel, namely control groups and namespaces, that made it possible to run software in isolated containers. These two changes made the container revolution possible.

At the OS level, the goal of independent application execution and failure isolation is achieved through the use of:

A)

namespaces

B)

Kubernetes

C)

control groups

D)

security groups

Correct Answer : namespaces

Explanation :

Namespaces make the isolation of the process that runs a Docker container possible.

Control groups are what make it possible to limit the amount of CPU time and memory allocated to a given container.

Security groups are typically associated with AWS configurations, and Kubernetes is a container orchestration tool.

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