Which of the following commands will create a swarm service which only listens on port 53 using the UDP protocol?

docker service create --name dns-cache -p 53:53/udp dns-cache
docker service create --name dns-cache -p 53:53 --service udp dns-cache
docker service create--namedns-cache-p 53:53..constraint networking.protocol.udp=true dns-cache
docker service create --name dns-cache -p 53:53 --udp dns-cache

Answer(s): A

Which of the following is true about using the '-P' option when creating a new container?

Docker binds each exposed container port to a random port on all the host's interface
Docker gives extended privileges to the container.
Docker binds each exposed container port to a random port on a specified host interface
Docker binds each exposed container port with the same port on the host

Answer(s): A

What behavior is expected when a service is created with the following command: 'docker service create --publish 8000:80 nginx'

All nodes in the cluster will listen on port 8080 and forward to port 80 in the container.
Only a single node in the cluster will listen on port 8080 and forward to port 80 in the container.
All nodes in the cluster will listen on port 80 and forward to port 8080 in the container.
Only a single node in the cluster will listen on port 80 and forward to port 8080 in the container.

Answer(s): A

Which set of commands can identify the published port(s) for a container? (Choose 1.)

Answer(s): B

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