Which of the following is true about all$-$to$-$all broadcast and reduction?

One method of performing an all$-$to$-$all broadcast is to perform a number of one$-$to$-$one broadcasts with one broadcast initiating from every node.

Different processes may also broadcast same messages.

This is a generalization of an all$-$in$-$one broadcast wherein all nodes sequentially initiate a broadcast and a process sends the same message to all of the other processes.

In it$,$ it is possible to use communication links in the communication network more effectively.