DCA Docker Networking Flashcards
6 cards from real DCA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 DCA Docker Networking flashcards as text
What is the purpose of DNS resolution in user-defined Docker networks?
Answer: To allow containers to communicate using container names as hostnames
User-defined networks include an embedded DNS server that allows containers to resolve each other by container name.
Which network driver assigns a MAC address and connects containers directly to the physical network?
Answer: macvlan
The macvlan network driver assigns a unique MAC address to each container, making it appear as a physical device on the network.
What happens to containers connected to the 'none' network driver?
Answer: They have no network access
The none network driver completely disables all networking for the container.
Which command connects a running container to an additional network?
Answer: docker network connect my-network my-container
The `docker network connect` command attaches a running container to an existing network.
What is the default subnet used by Docker's default bridge network (docker0)?
Answer: 172.17.0.0/16
Docker's default bridge network uses the 172.17.0.0/16 subnet by default.
In Docker Swarm, which network is automatically created to handle load balancing for published service ports?
Answer: An ingress overlay network
Docker Swarm automatically creates an ingress overlay network to implement the routing mesh for published ports.
How this page was made: written with AI tools and published by Nathan Beja, founder of Practice Test Geeks, who is responsible for its content. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy
Sources & references
Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy
- training.mirantis.com — Test delivery, eligibility, fees, passing score, renewal, retake policy, score release, time limit, score validity · verified Oct 2026