Multicasting can be done on a hub but a hub does not need it always. Configuring a router or switch to use multicasting requires that the router or switch be IGMP capable.
IGMP
The terms Unicasting and Multicasting are used in computer networks. By Unicasting we mean that the communication is a One-to-One communication,ie. one computer interacts with just one other computer. by multicasting we mean that it is a One-to-Many communication.ie the computer interacts with more than one computer on the network.
Logging on to a host over the Internet
Kevin Savetz has written: 'MBONE, multicasting tomorrow's Internet' -- subject- s -: Interactive multimedia, Multicasting - Computer networks -, Internet 'Internet Top Ten Lists'
Multicast is a computer networking process. In multicasting, a message is sent to several machines at the same time through a single transmission from the source. It is mostly used in IP multicasting.
Participating in a company-wide videoconferencing via the Internet
Multicasting
Use multicasting
Making the move to digital TV can give viewers access to additional local TV channels. Multicasting is the technology that allows a single station to provide as many as six separate programming streams simultaneously, free and over the air.
David G. Petitt has written: 'Solutions for reliable multicasting'
There are three possible ways of data communication among computers: 1) broadcasting - ONE computer to ALL computers 2) unicasting - ONE computer to ONE computer 3) multicasting - ONE computer to A GROUP of computeres as we discuss above that multicast means their is a group in a company and we have to send a mail to a particular group then we use a multicast network ... and another example of multicast is ,In digital television broadcasting, to send multiple standard TV (SDTV) programs in the allotted bandwidth, rather than one high-definition TV (HDTV) program.