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.
Multicast is a real pain. The more I learn it the more I hate it... I'm sure that it hates me too. Anyway, I'm studying anycast RP and MSDP. I have a few GNS3 labs created and I can use the same IP as the RP address on two RPs and use MSDP to bridge the shared trees of each RP.