Also see unicast , multicast , and anycast . The term is sometimes used in e-mail or other message distribution for a message sent to all members, rather than specific members, of a group such as a department or enterprise. Like publicly available radio and television broadcasts, Web broadcasts are available to anyone. The Web now offers live as well as prepackaged broadcasts and also plays back audio and video tapes.
Some programming is scheduled and other prepackaged programs can be delivered on demand.
Many Web users listen to music from a particular broacasting site as they surf other sites on the Web.