DCA DCA Docker Networking

Question 1

What is the default network driver used when you create a container without specifying a network?

Accepted Answer

bridge

Answer

host

Answer

overlay

Answer

none

Question 2

Which Docker network driver allows containers on different Docker hosts to communicate?

Accepted Answer

overlay

Answer

bridge

Answer

host

Answer

macvlan

Question 3

What command creates a user-defined bridge network named 'my-network'?

Accepted Answer

docker network create --driver bridge my-network

Answer

docker network add my-network

Answer

docker create network my-network

Answer

docker network init my-network

Question 4

Which port publishing flag maps host port 8080 to container port 80?

Accepted Answer

-p 8080:80

Answer

-p 80:8080

Answer

-P 8080:80

Answer

--port 8080-80

Question 5

What does the `--network host` flag do when running a container?

Accepted Answer

Shares the host's network namespace with the container

Answer

Creates a new isolated network

Answer

Disables all networking

Answer

Connects the container to a bridge network

Question 6

Which command displays all Docker networks on a host?

Accepted Answer

docker network ls

Answer

docker network show

Answer

docker network list --all

Answer

docker networks