Discuss Docker DCA Exam Topic 3 Question 103

Is this a type of Linux kernel namespace that provides container isolation?

Solution. Host

AYes

BNo

Suggested Answer: B

= Host is not a type of Linux kernel namespace that provides container isolation.Linux namespaces are a feature of the Linux kernel that partitions kernel resources such that one set of processes sees one set of resources while another set of processes sees a different set of resources1.There are eight kinds of namespaces available: Mount, Process, User, Network, UTS, IPC, Cgroup, and Time1.Host is a parameter that can be used to run a container in the host's network namespace, which means the container shares the same network interfaces and configuration as the host2.Reference:

Linux namespaces - Wikipedia

Network settings | Docker Documentation

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31 comments · newest first

Catrice 10 months ago

No, it’s not the host namespace.

Herminia 11 months ago

Wait, are we sure about that? Seems off to me.

Carolynn 11 months ago

Totally agree, it’s all about isolation!

Veda 11 months ago

I thought it was just for process isolation, not containers.

Jovita 11 months ago

Yes, that's definitely a type of namespace!

Margart 12 months ago

I practiced a similar question, and I think "No" makes sense since "Host" usually refers to the physical machine, not a namespace.

Crissy 12 months ago

This feels familiar, but I can't recall if "Host" is a specific type of namespace. Could it be a trick question?

Armanda 12 months ago

I remember studying namespaces, and I thought they were all about isolation. Maybe "Yes" is correct?

Avery 1 year ago

I think the answer might be "No," but I'm not entirely sure if "Host" refers to a namespace.

Julio 1 year ago

Hmm, I'm not totally confident on this. I'll make an educated guess and go with A, but I'll double-check my understanding later.

Jaclyn 1 year ago

I'm a bit unsure about this one. I'll need to review my notes on Linux kernel namespaces to make sure I understand how they work with containers.

Bette 1 year ago

I've got this! The Host namespace is used for container isolation, so the answer is A.

Sherell 1 year ago

Okay, let's see. I know containers use namespaces for isolation, so I'll need to recall which specific namespace is responsible for that.

Jaclyn 1 year ago

Hmm, this seems like a tricky one. I'll need to think through the Linux kernel namespaces and how they relate to container isolation.

Miss 2 years ago

Ah, the age-old debate: 'Host' or 'No'. I'll just consult my Magic 8-Ball on this one.

Tanesha 2 years ago

↳ replying to Miss

Yes

Jolene 2 years ago

↳ replying to Miss

Sage 2 years ago

↳ replying to Miss

Yes

Eveline 2 years ago

Containers? Namespaces? What is this, a tech support hotline? I'm just going to pick 'B' and move on.

Lashon 2 years ago

This is a trick question, isn't it? 'Host' can't be the answer, that's way too obvious.

Idella 2 years ago

↳ replying to Lashon

B) No

Viki 2 years ago

↳ replying to Lashon

A) Yes

Ma 2 years ago

I agree with Elke, the solution Host is indeed a type of Linux kernel namespace for container isolation.

Lemuel 2 years ago

Hmm, I'm not sure. Containers are tricky, but I think the 'Host' answer might be right.

Paris 2 years ago

I think it's No, because the solution provided is Host, not a type of Linux kernel namespace.

Susana 2 years ago

Of course this is a type of Linux kernel namespace, that's the whole point of containers!

Tish 2 years ago

↳ replying to Susana

No problem, happy to help!

Jeanice 2 years ago

↳ replying to Susana

I knew it! Thanks for confirming.

Antione 2 years ago

↳ replying to Susana

Exactly, the host namespace provides container isolation.

Nieves 2 years ago

↳ replying to Susana

Yes

Elke 2 years ago

Yes, it is a type of Linux kernel namespace that provides container isolation.

Docker DCA Exam - Topic 3 Question 103 Discussion