Discuss LPI 701-100 Exam Topic 2 Question 20

The following command is issued on two docker nodes:

docker network create --driver bridge isolated_nw

Afterwards, one container is started at each node with the parameter --network=isolated_nw. It turns out that the containers can not interact with each other. What must be done in order to allow the containers to interact with each other? (Choose two correct answers.)

AUse a host network instead of a bridged network.

BAdd the option --inter-container to the docker network create command.

CStart the containers on the same node.

DChange the --network parameter of docker create to --network=isolated_nw,nofence.

EUse an overlay network instead of a bridged network.

Suggested Answer: C, D

Reference https://docs.docker.com/v17.09/engine/userguide/networking/#bridge-networks

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14 comments · newest first

Jacqueline 11 months ago

I thought bridged networks could work across nodes, guess I was wrong!

Wynell 12 months ago

Starting containers on the same node is a workaround, but not ideal.

Janey 12 months ago

Wait, can’t you just use a host network instead?

Launa 12 months ago

Totally agree, bridged networks are limited to a single host.

Ellen 1 year ago

You need an overlay network for cross-node communication.

Lashunda 1 year ago

I don't recall any option like --inter-container in the Docker documentation. That one seems off to me.

Nicolette 1 year ago

I practiced a similar question, and I feel like using a host network might work, but it seems risky for isolation.

Osvaldo 1 year ago

I'm not entirely sure, but I think starting the containers on the same node could allow them to interact. That seems like a simpler solution.

Jacquelyne 1 year ago

I remember something about bridge networks being limited to a single host, so I think we might need an overlay network for cross-node communication.

Casie 1 year ago

I'm a bit confused by the different output options. I'll need to run the code myself or carefully walk through it to figure out which one is correct.

Melina 1 year ago

Hmm, I'm a bit unsure about this one. There seem to be a few different options, and I want to make sure I choose the right approach to get all the users configured correctly.

Keneth 1 year ago

Hmm, this looks like a tricky one. I'll need to think carefully about the different types of files used for inter-process communication.

Mel 1 year ago

I remember something about the structure of the function, but I'm not certain how the message should be formatted before sending it.

Gracia 1 year ago

Focus on what doesn't align with professional standards. Diverse perspectives and cross-functional expertise are crucial in fraud assessment, so I'd rule out the statement about team size.

LPI 701-100 Exam - Topic 2 Question 20 Discussion