The correct answer is Internet Relay Chat (IRC).Internet Relay Chat (IRC) allows each participant's contribution displayed on the screens to all outer taking part in the conversation.Internet Relay Chat (IRC) is a text-based chat system.It enables discussions among any number of participants in so-called conversation channels, as well as discussions between only two partners.For example, in question-and-answer dialogues.Any participant may open a new conversation channel, and a single computer user can also take part in several such simultaneous channels.Additional InformationRouterA router receives and sends data on computer networks.Routers are sometimes confused with network hubs, modems, or network switches.However, routers can combine the functions of these components, and connect with these devices, to improve Internet access or help create business networks. Multicast backbone (MBONE)The Multicast backbone (MBone) is used to multicast network traffic over an IP network.MBone is primarily designed to multicast audio and video signals over the Internet.It required special hardware and software.In 1990, MBone was used as an experiment for network multicasting traffic. Its primary uses include audio and video streaming for TV channels and video conferencing.In 1994, MBone was first used as a multicast backbone for the transmission of a musical concert.In 1995, Russia used an MBone multicast link in a sound research laboratory.