Docker Container Networking Quiz

1. Which of the following is true about container DNS in Docker?

Containers always use the host's DNS servers

Docker provides built-in DNS resolution for container names

DNS resolution only works on overlay networks

Container DNS requires external configuration

2. What is the primary security benefit of using overlay networks in Docker Swarm?

Faster packet transmission

Encryption of traffic between nodes

Reduced memory usage

Better DNS resolution

3. In Docker Swarm, which network type is automatically created for service discovery?

Bridge

Ingress

Host

Macvlan

4. What happens when you connect a running container to a new network?

The container restarts

The container gains a new network interface without restarting

The container loses its original network

The operation is not permitted

5. Which command removes a Docker network from the system?

Docker network delete mynet

Docker network remove mynet

Docker remove network mynet

Docker network disconnect mynet

6. In Docker, what is a virtual IP (VIP) in the context of services?

The host machine's IP address

A stable IP assigned to a service for load balancing

The container's internal IP

A public IP for external access

7. What does port 2375 typically represent in Docker networking?

Secure Docker API port

Unencrypted Docker API port

Container communication port

Swarm manager port

8. Which flag allows you to specify a custom IP address for a container when running it?

--ip-address

--network-ip

--ip

--static-ip

9. What is the macvlan network driver primarily used for?

Multi-host communication

Assigning MAC addresses to containers

Legacy application compatibility with physical networks

Securing inter-container traffic

10. In Docker Swarm, what does the embedded DNS server do?

Routes traffic between services

Resolves service names to virtual IPs

Manages SSL certificates

Monitors container health

11. Which network driver allows containers to communicate with the host and external networks directly?

Bridge

Host

Overlay

Macvlan

12. What is the purpose of the 'docker network inspect' command?

To list all available networks

To view detailed information about a specific network

To create a new network

To delete a network

13. In Docker, which port mapping syntax exposes port 8080 inside a container to port 80 on the host?

-p 8080:80

-p 80:8080

-p 80/tcp:8080

-p host:8080:80

14. What does the 'none' network driver in Docker do?

Connects to the host network

Provides no network access to the container

Creates an overlay network

Connects to a bridge network automatically

15. Which Docker networking mode would you use to expose a container directly to the host's network interface?

Bridge

Overlay

Host

Macvlan

16. How do containers on the same custom bridge network communicate with each other by default?

Using IP addresses only

Using container names for DNS resolution

Using MAC addresses

They cannot communicate directly

17. What is the primary advantage of using an overlay network in Docker Swarm?

Improved host performance

Secure multi-host container communication

Direct access to host network interface

Lower CPU overhead

18. Which network driver is used for communication across multiple Docker hosts in Swarm mode?

Bridge

Host

Overlay

Macvlan

19. What command creates a custom bridge network in Docker?

Docker network create --driver bridge mynet

Docker bridge create mynet

Docker net new mynet

Docker create network bridge mynet

20. In Docker, what is the default network driver for containers on a single host?

Overlay

Bridge

Host

None

Docker Associate Container Networking Quiz

1. Which of the following is true about container DNS in Docker?

2.

What first name or nickname would you like us to use?

2. What is the primary security benefit of using overlay networks in Docker Swarm?

3. In Docker Swarm, which network type is automatically created for service discovery?

4. What happens when you connect a running container to a new network?

5. Which command removes a Docker network from the system?

6. In Docker, what is a virtual IP (VIP) in the context of services?

7. What does port 2375 typically represent in Docker networking?

8. Which flag allows you to specify a custom IP address for a container when running it?

9. What is the macvlan network driver primarily used for?

10. In Docker Swarm, what does the embedded DNS server do?

11. Which network driver allows containers to communicate with the host and external networks directly?

12. What is the purpose of the 'docker network inspect' command?

13. In Docker, which port mapping syntax exposes port 8080 inside a container to port 80 on the host?

14. What does the 'none' network driver in Docker do?

15. Which Docker networking mode would you use to expose a container directly to the host's network interface?

16. How do containers on the same custom bridge network communicate with each other by default?

17. What is the primary advantage of using an overlay network in Docker Swarm?

18. Which network driver is used for communication across multiple Docker hosts in Swarm mode?

19. What command creates a custom bridge network in Docker?

20. In Docker, what is the default network driver for containers on a single host?