Docker daemon starts a docker0 bridge in network connection and disconnects the laptop from intranet and internet

I installed the docker on my laptop having Ubuntu 16.04. Immediately the Docker daemon started and I saw bridge0 in network connections. Suddently I saw that it disconnected the laptop from intranet and internet.
If I deleted the bridge0 connection, the intranet and internet connection again started.

Can the experts please help?