Q. Collective Communications - Broadcast?

Broadcast: Broadcasting can be done in two ways one of them is one to all and another one is all to all. In the matter of one to all broadcasting one processor sends the same message to several destinations with a single operation whereas in communication, all-to-all broadcasting occurs in many-to-many fashion. The messages can be either personalised or non-personalized. In the case of personalized broadcasting unique messages are being sent to each destination processor.