media

<data>

1. Any kind of data including graphics, images, audio and video, though typically excluding raw text or executable code.

The term multimedia suggests a collection of different types of media or the ability to handle such collections.

<storage>

2. The physical object on which data is stored, as opposed to the device used to read and write it.

<networking>

3. The object at the physical layer that carries data, typically an electrical or optical cable, though, in a wireless network, the term refers to the space through which radio waves propagate. Most often used in the context of Media Access Control (MAC).

Last updated: 2010-01-07

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Media Access Control

<networking>

(MAC) The lower sublayer of the OSI data link layer. The interface between a node's Logical Link Control and the network's physical layer. The MAC differs for various physical media.

See also MAC Address, Ethernet, IEEE 802.3, token ring.

[What does it do? Examples?]

Last updated: 1996-01-29

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Media Access Unit

<networking>

(MAU or Multistation Access Unit, MSAU) In a Token Ring network, a device to attach multiple network stations in a star topology, internally wired to connect the stations into a logical ring. The MAU contains relays to short out nonoperating stations. Multiple MAUs can be connected into a larger ring through their Ring In/Ring Out connectors.

Last updated: 1997-05-27

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Media Converter

<networking>

A component used in Ethernet, although it is not part of the IEEE standard. The IEEE standard states that all segments must be linked with repeaters. Media converters were developed as a simpler, cheaper alternative to repeaters. However, in the 1990s the cost difference between the two is negligible.

Last updated: 1996-12-09

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Media Access UnitMedia ConverterMedia Gateway Control Protocol

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Media Gateway Control Protocol

<communications, protocol>

(MGCP) A protocol used within a Voice over IP system. MGCP is an IETF work in progress, it superseded SGCP.

MGCP is an internal protocol used within a distributed system that appears to the outside world as a single VoIP gateway.

This system is composed of a Call Agent, and a set of gateways, including at least one "media gateway" that performs the conversion of media signals between circuits and packets, and at least one "signalling gateway" when connected to an SS7 controlled network.

IETF MGCP draft.

Last updated: 1999-03-17

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Medium Access Control

Media Access Control

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