Docker Networking | Docker Container Networking | Docker Tutorial

Docker Networking | Docker Container Networking | Docker Tutorial
Why Docker Networking
Containers need to talk to external world.
Reach Containers from external world to use the service that containers provides.
Allows Containers to talk to host machine.
Inter-container connectivity in same host and across hosts.
Discover services provided by containers automatically.
It standardizes the steps required to provide networking for containers using multiple network drivers. 
The CNM has interfaces for IPAM plugins and network plugins.
The IPAM plugin APIs are used to create/delete address pools and allocate/deallocate container IP addresses, whereas the network plugin APIs are used to create/delete networks and add/remove containers from networks.
A CNM has mainly built on 5 objects: Network Controller, Driver, Network, Endpoint, and Sandbox.

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