multicast - definição. O que é multicast. Significado, conceito
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O que (quem) é multicast - definição

COMPUTER NETWORKING TECHNIQUE FOR FORWARDING TRANSMISSIONS FROM ONE SENDER TO MULTIPLE RECEIVERS
Multicasting; Multicast Group; Multicast group; Multicast Transmission; Multicast transmission; Multi cast; Interactive Multicast

multicast         
¦ verb (past and past participle multicast) send (data) across a computer network to several users at the same time.
¦ noun a set of multicast data.
IP multicast         
IP NETWORKING TECHNIQUE FOR FORWARDING TRANSMISSIONS FROM ONE SENDER TO MULTIPLE RECEIVERS
Ip multicasting; Multicast IP; Group Destination Address; CastGate; Castgate; Secure multicast; IPv6 multicast; IP Multicast; Internet Protocol multicast; IP multicasting
IP multicast is a method of sending Internet Protocol (IP) datagrams to a group of interested receivers in a single transmission. It is the IP-specific form of multicast and is used for streaming media and other network applications.
Multicast address         
LOGICAL IDENTIFIER TO ADDRESS A SPECIFIC GROUP OF DEVICES IN MULTICAST
Zone Multicast Address; IPv4 multicast address; Ethernet multicast address
A multicast address is a logical identifier for a group of hosts in a computer network that are available to process datagrams or frames intended to be multicast for a designated network service. Multicast addressing can be used in the link layer (layer 2 in the OSI model), such as Ethernet multicast, and at the internet layer (layer 3 for OSI) for Internet Protocol Version 4 (IPv4) or Version 6 (IPv6) multicast.

Wikipédia

Multicast

In computer networking, multicast is group communication where data transmission is addressed to a group of destination computers simultaneously. Multicast can be one-to-many or many-to-many distribution. Multicast should not be confused with physical layer point-to-multipoint communication.

Group communication may either be application layer multicast or network-assisted multicast, where the latter makes it possible for the source to efficiently send to the group in a single transmission. Copies are automatically created in other network elements, such as routers, switches and cellular network base stations, but only to network segments that currently contain members of the group. Network assisted multicast may be implemented at the data link layer using one-to-many addressing and switching such as Ethernet multicast addressing, Asynchronous Transfer Mode (ATM), point-to-multipoint virtual circuits (P2MP) or InfiniBand multicast. Network-assisted multicast may also be implemented at the Internet layer using IP multicast. In IP multicast the implementation of the multicast concept occurs at the IP routing level, where routers create optimal distribution paths for datagrams sent to a multicast destination address.

Multicast is often employed in Internet Protocol (IP) applications of streaming media, such as IPTV and multipoint videoconferencing.

Exemplos do corpo de texto para multicast
1. The FCC, under former Chairman Michael Powell, last year rejected must–carry for multicast channels.