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(1) To transmit data to multiple recipients on the network at the same time using one transmission stream to the switches, at which point data are distributed out to the end users on separate lines.

Contrast with Unicast
A "unicast" is a separate transmission stream from source to destination for each recipient. When sending large volumes of data, multicast saves considerable bandwidth over unicast.

Contrast with Broadcast
A "broadcast" is a transmission to every node reachable on the network or subnet, rather than to a specific list of nodes as in a multicast. See IP multicast, IGMP and SRM.

(2) In digital television broadcasting, to send multiple standard TV (SDTV) programs in the allotted bandwidth, rather than one high-definition TV (HDTV) program.

References in periodicals archive ?
Multicast is designed to deliver data to multicast destination hosts and is widely used in I P T V, r e a l-time data transmission, multi-media conferences etc.
In multicast communication, if the defender changes multicast route in real time, the current route will be difficult to be found by the attacker.
In social networking, multicast is the delivery of a data or information to a group of recipients concurrently in a single transmission from the sender.
This paper is organized as follows: Section II discusses optimized task scheduler in multicast routing, Section III shows the study and analysis of the existing multicast routing techniques in social network, Section IV identifies the possible comparison between them and Section V concludes the paper, key areas of research is given to optimize the communication path over huge group of elements with multicast scalable secure routing.
LTE Multicast allows carriers to off-load a large percentage of their video and data traffic.
ZTE s IP RAN products backs many multicast technologies, e.
Depending on the underlying topology used for communication, the multicast protocols are mainly classified as: tree-based and mesh-based protocols.
With these challenges in mind, Cisco is expanding its widely deployed MPLS VPN solution to include the following four technologies in Cisco IOS Software: Multicast VPNs, NAT and ODAP for MPLS VPNs, and VPN Select.
IP Multicast offers a third possibility, one-to-many communication.
This book provides a concise guide to current IP Multicast technology and its applications, with a focus on IP-based Television (IPTV) and Digital Video Broadcast-Handheld (DVB-H) applications--areas of tremendous commercial interest.
Keywords: Overlay multicast, measure matrix, fluctuation factor, perturbation theory, update strategy

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