Why should you care? Well, understanding how IP addresses work is vital if you ever want to troubleshoot why your network isn’t working right, or why a particular device isn’t connecting the way you’d expect it to. RELATED: 8 Common Network Utilities Explained But, if you’ve ever wanted to dive a little deeper into what those numbers mean, this article is for you. When we do have to deal with them, we often just follow instructions about what numbers to put where. Most of the time, we don’t have to deal with them directly, since our devices and networks take care of that stuff behind the scenes. If you’ve worked with computers for any amount of time, you’ve likely been exposed to IP addresses-those numerical sequences that look something like 192.168.0.15.
In the world of TCP/IP networking, that identifier is the Internet Protocol (IP) address.
We’ll get into more details about this when we’ll learn How to Build Docker Images by using Dockerfile in the next article.Every device connected to a network-computer, tablet, camera, whatever-needs a unique identifier so that other devices know how to reach it. Thank you for reading this article, I hope you will understand the Docker Networking. Comparing with the none network.Ĥ] The Bridge network reduces the level of network isolation in favor of better outside connectivity.ĥ] A bridge network is most suitable where you want to set up a relatively small network on a single host. But we can manually connect a container to another bridge network.ģ] Bridge network is the most common network-model in Docker. So, the Containers from different bridge networks can’t connect with each other by default.
This is the one used to connect to the outside network.Ģ] All containers in the same bridge network can communicate with each other. Benefits of the bridge network modelġ] In a bridge network model, containers have access to two network interfaces: the loopback interface, which does not have network access to the outside, and a private interface that is connected to the bridge network of the host. Once connected, the container can communicate with other containers in the same network. This is the default type of network in Docker containers.Īs you see, we can’t reach container 1 from container 3, because they are within different bridge networks, and each bridge network is isolated from each other.īut, Docker has a feature that allows us to connect a container to another network. Here, we are going to understand about another network model, the bridge network model.
We will deep dive into each of those four different Docker networks in the following examples So, that you can make a decision to choose which Docker network model to use when creating Docker containers. 2] Bridge network 3] Host network 4] Overlay network. There are actually four different types of Docker networks: 1] Closed network which is also called none network. This is how the default Docker network model called bridge network looks like. Containers can connect to each other and connect to the outside world through this bridge network interface. Once the Docker daemon is installed on the host machine, A bridge network interface “Docker 0” is provisioned on the host which will be used to bridge the traffic from the outside network to the internal containers hosted on the host machine.Įach container connects to the bridge network through its container network interface. Docker uses the networking capabilities of the host machine operating system to provide networking support for the containers running on the host machine.