Introduction to Client and server ports.

1. Run Mongod : Server local port will always be 27017.
2. Run Mongo : Client local port  will always be 127.0.0.1:5108
                                  5108 may change.

once mongo connects to mongod, there will be a log displayed.

1. Clients port with time stamp.
2. Application name.
3. Driver name.
4. Version.
5. OS type, OS name, architecture, Version.

On Client Side :

if access control is not enabled then an error log is displayed as :

"Access control is not enabled for the database"
Also:
"Read, Write, Permission is logged: Read and Write access to data and configuration is unrestricted"