Commercial speech, however, is less protected by the First Amendment than political speech, and is therefore subject to greater regulation. The Free Press Clause protects publication of information and opinions, and applies to a wide variety of media.
In computer networking, multicast (one-to-many or many-to-many distribution) is group communication where information is addressed to a group of destination computers simultaneously.
There are two different models for IP multicast: 1  Any Source Multicast (ASM), in which a receiver joins a multicast group, and receives traffic from any senders that send to that group. 2  Source-Specific Multicast (SSM), in which a receiver explicitly joins to a (source, group) pairing.