@ChrisW67 Thank you for the reply but...
There is my interfaces states before AND after running the "example program" that actually works.
[image: 94e65e68-5cd0-40b6-9072-d7bdb447fa6c.png]
Where, in its code, the "example uses any interface including...".
Because I ran the "example" by disabling the "setSocketOption" line and replaced in the ipv4 socket bind "::AnyIPv4" with "::LocalHost" and it did not prevent the app from sending datagrams to the concerned broadcast address.