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--- docker:networking:default_docker_networks [2025/07/25 19:20] – created peter
+++ docker:networking:default_docker_networks [2025/07/25 19:23] (current) – peter
@@ Line 1: / Line 1: @@
 ====== Docker - Networking - Default Docker Networks ======
+When Docker is installed, it automatically creates a few default networks:
+  * **Bridge**: The default network for containers.
+    * If no network is specified when creating a container, Docker places it in the bridge network.
+    * The default network type for containers on standalone hosts.
+    * Containers on the same bridge network can communicate with each other via IP addresses, and you can also map container ports to the host system.
+  * **Host**: Bypasses Docker’s virtualized network stack and allows the container to use the host’s network directly.
+    * This network mode allows a container to share the host system’s network stack.
+    * No isolation between the container and the host network.
+  * **None**: Containers are isolated with no network interface, perfect for processes that do not need network connectivity.
+----
+====== Docker - Networking - The default network ======
+Every clean installation of Docker comes with a pre-built network called **bridge**.
+<code bash>
+docker network ls
+</code>
+returns:
+<code>
+NETWORK ID     NAME      DRIVER    SCOPE
+df8a26c099   bridge    bridge    local
+d0975ea463   host      host      local
+ffd8ff93   none      null      local
+</code>
+<WRAP info>
+**NOTE:**  The **bridge** network is associated with the bridge driver.
+  * It is important to note that the network and the driver are connected, but they are not the same.
+    * In this example the network and the driver have the same name - but they are not the same thing!
+  * The output above also shows that the bridge network is scoped locally.
+    * This means that the network only exists on this Docker host.
+    * This is true of all networks using the bridge driver - the bridge driver provides single-host networking.
+  * All networks created with the bridge driver are based on a Linux bridge (a.k.a. a virtual switch).
+</WRAP>
+----