Broadcasting (computing)

Broadcasting (computing)
Broadcast.svg

In telecommunication and information theory, broadcasting refers to a method of transferring a message to all recipients simultaneously. Broadcasting can be performed as a high level operation in a program, for example broadcasting Message Passing Interface, or it may be a low level networking operation, for example broadcasting on Ethernet.

Contents

Overview

Routing schemes

Cast.svg

anycast

Anycast.svg

broadcast

Broadcast.svg

multicast

Multicast.svg

unicast

Unicast.svg

geocast

Geocast.svg

v · d · e

In computer networking, broadcasting refers to transmitting a packet that will be received by every device on the network[1]. In practice, the scope of the broadcast is limited to a broadcast domain. Broadcast a message is in contrast to unicast addressing in which a host sends datagrams to another single host identified by a unique IP address.

Not all network technologies support broadcast addressing; for example, neither X.25 nor frame relay have broadcast capability, nor is there any form of Internet-wide broadcast. Broadcasting is largely confined to local area network (LAN) technologies, most notably Ethernet and token ring, where the performance impact of broadcasting is not as large as it would be in a wide area network.

The successor to Internet Protocol Version 4 (IPv4), IPv6 also does not implement the broadcast method to prevent disturbing all nodes in a network when only a few may be interested in a particular service. Instead it relies on multicast addressing a conceptually similar one-to-many routing methodology. However, multicasting limits the pool of receivers to those that join a specific multicast receiver group.

Both Ethernet and IPv4 use an all-ones broadcast address to indicate a broadcast packet. Token Ring uses a special value in the IEEE 802.2 control field.

Broadcasting may be abused to perform a DoS-attack. The attacker sends fake ping request with the source IP-address of the victim computer. The victim computer is flooded by the replies from all computers in the domain.

See also

References

  1. ^ Andrew Tanenbaum (2003). Computer Networks. p. 368. ISBN 0130661023. 

External links


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • Georgia Institute of Technology College of Computing — Infobox University name = College of Computing established = 1964/1988cite web|url=http://www.cc.gatech.edu/inside/history|title=History|publisher=Georgia Tech College of Computing|accessdate=2007 08 15] type = Public city = Atlanta state =… …   Wikipedia

  • Women in computing — Global concerns about current and future roles of women in computing occupations gained more importance with the emerging information age. These concerns motivated public policy debates addressing gender equality as computer applications exerted… …   Wikipedia

  • NEXUS International Broadcasting Association — (NEXUS IBA) was officially founded in 1988 in Milan, Italy, as a non profit association of broadcasters and program producers. As the Latin word nexus, NEXUS IBA is a link (or point of connection) between content producers and the association s… …   Wikipedia

  • Server (computing) — For other uses, see Server (disambiguation). Servers in a data center. Several servers are mounted on a rack and connected to a display …   Wikipedia

  • Radio Computing Services — Infobox Company type = company name = Radio Computing Services foundation = 1979 location city = White Plains, New York location country = United States of America industry = Broadcast automation products = Selector, GSelector, Linker, Master… …   Wikipedia

  • Router (computing) — A Cisco ASM/2 32EM router deployed at CERN in 1987 …   Wikipedia

  • Traffic (broadcasting) — In broadcasting, traffic is the scheduling of program material, and in particular the advertisements, for the broadcast day. In a commercial radio station there is a vital link between sales (of advertisement or commercial space) and the traffic… …   Wikipedia

  • DVB — Digital Video Broadcasting (Community » Media) Digital Video Broadcasting (Computing » General) Digital Video Broadcasting (Computing » Drivers) **** Digital Video Broadcast (Community » Media) …   Abbreviations dictionary

  • Portal:Technology — Wikipedia portals: Culture Geography Health History Mathematics Natural sciences People Philosophy Religion Society Technology …   Wikipedia

  • DMB — Dave Matthews Band (Community » Media) * Digital Multimedia Broadcasting (Computing » Telecom) * Dodo s Message Board (Internet » Chat) * Diamond Mind Baseball (Business » Firms) * Department of Management and Budget (Governmental » State &… …   Abbreviations dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”