What is the difference between bridge network and overlay network

Question

Hi Guys,

I have configured the docker swarm in the Linux system. I have found the overlay driver in the network section. Can anyone tell me the difference between a bridge network and an overlay network?

Answer 1

Hi@akhtar,

The Bridge is the default network driver. If you don’t specify a driver, this is the type of network you are creating. Bridge networks are usually used when your applications run in standalone containers that need to communicate.

Overlay networks connect multiple Docker daemons together and enable swarm services to communicate with each other. You can also use overlay networks to facilitate communication between a swarm service and a standalone container, or between two standalone containers on different Docker daemons. This strategy removes the need to do OS-level routing between these containers.