Why custom networks matter in Docker - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the command to create a custom Docker network named 'mynetwork'.

Docker

docker network [1] mynetwork

Drag options to blanks, or click blank then click option'

Acreate

Bstart

Crun

Dbuild

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'run' instead of 'create' will try to start a container, not create a network.

The docker network create command is used to create a new custom network in Docker.

2fill in blank

medium

Complete the command to run a container named 'webapp' attached to the custom network 'mynetwork'.

Docker

docker run --name webapp --network [1] nginx

Drag options to blanks, or click blank then click option'

Anone

Bbridge

Chost

Dmynetwork

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'bridge' connects to the default network, not the custom one.

To connect a container to a custom network, use the network's name with the --network option.

3fill in blank

hard

Fix the error in the command to inspect the custom network 'mynetwork'.

Docker

docker network [1] mynetwork

Drag options to blanks, or click blank then click option'

Aremove

Binspect

Clist

Dconnect

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'list' shows all networks, not details of one.

The docker network inspect command shows details about a specific network.

4fill in blank

hard

Fill both blanks to create a custom bridge network with a specific subnet.

Docker

docker network create --driver [1] --subnet [2]/24 customnet

Drag options to blanks, or click blank then click option'

Abridge

Bhost

C192.168.100.0

D10.0.0.0

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'host' driver does not support subnet configuration.

Custom bridge networks use the 'bridge' driver and you specify the subnet with the IP range.

5fill in blank

hard

Fill both blanks to connect a running container 'db' to the custom network 'customnet' with alias 'database'.

Docker

docker network [1] --alias [2] customnet db

Drag options to blanks, or click blank then click option'

Aconnect

Bcontainer

Cdatabase

Drun

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'run' tries to start a new container instead of connecting an existing one.

Use docker network connect to add a container to a network. Specify the container name and alias.