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Topic: Media Access Control

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	Medium Access Control (MAC)
		The Medium Access Control (MAC) protocol is used to provide the data link layer of the Ethernet LAN system.
		The MAC protocol encapsulates a SDU (payload data) by adding a 14 byte header (Protocol Control Information (PCI)) before the data and appending a 4-byte (32-bit) Cyclic Redundancy Check (CRC) after the data.
		The maximum size of data which may be carried in a MAC frame using Ethernet is 1500 bytes (this is known as the MTU in IP).
	www.erg.abdn.ac.uk /users/gorry/course/lan-pages/mac.html (1099 words)

	MAC (Media Access Control) (Linktionary term)
		The lower MAC layer provides the interface between the LLC and the particular network medium that is in use (Ethernet, token ring, and so on).
		The MAC layer frames data for transmission over the network, and then passes the frame to the physical layer interface where it is transmitted as a stream of bits.
		The primary access methods are carrier sensing (nodes listen for a carrier tone on the cable and may transmit when the line is free) and token passing (nodes must have possession of a token before they can transmit).
	www.linktionary.com /m/mac.html (439 words)

	How to Troubleshoot Duplicate Media Access Control Address Conflicts
		Media access control addresses are preassigned and permanently burned into the network interface card (NIC).
		Another source of duplicate media access control addresses can occur if you are assigning locally administered media access control addresses (LAA), in which case you are overriding the burned-in address in favor of the locally assigned media access control address.
		To troubleshoot this problem, you have to determine which other computer on the network is using the same media access control address.
	support.microsoft.com /default.aspx?scid=kb;en-us;164903 (603 words)

	RFC 3422 (rfc3422) - Forwarding Media Access Control (MAC) Frames over Mul
		Forwarding a MAC frame from H1 to H2 over the VPN The process of forwarding a MAC frame transparently from host H1 to host H2 is also shown in figure 2.
		When a MAC frame is received by the ethernet interface, the address table is searched using the destination MAC address as the key.
		Forwarding a MAC broadcast or multicast frame All MAC broadcast or multicast frames must be duplicated for transmission (via MAPOS unicast) to each of the peer network adapters in the same VLAN as the sending network adapter.
	www.faqs.org /rfcs/rfc3422.html (3082 words)

	Ethernet (Site not responding. Last check: 2007-11-07)
		It defines wiring and signaling for the physical layer, and packet formats and protocolss for the media access control (MAC)/data link layer of the OSI model.
		Originally developed in the 1960s for the ALOHAnet in Hawaii using radio, the scheme is relatively simple compared to token ring or master controlled networks.
		However, as it is easy to subvert switched Ethernet systems by means such as ARP Spoofing and MAC flooding, as well as for the network administrators to use monitoring functions to copy traffic from the network, switched Ethernet should still be regarded as an insecure network technology.
	www.sciencedaily.com /encyclopedia/ethernet (2575 words)

	Media Access Control address - a Whatis.com definition - see also: MAC address (Site not responding. Last check: 2007-11-07)
		In a local area network (LAN) or other network, the MAC (Media Access Control) address is your computer's unique hardware number.
		The MAC address is used by the Media Access Control sublayer of the Data-Link Layer (DLC) of telecommunication protocols.
		There is a different MAC sublayer for each physical device type.
	whatis.techtarget.com /definition/0,,sid9_gci212506,00.html (168 words)

	Media Access Control (Site not responding. Last check: 2007-11-07)
		Media access control (MAC) refers to the need to control when devices transmit.
		MAC becomes important when several computers share the same communications circuit to ensure no two devices attempt to transmit data at the same time.
		There are two main types of MAC, controlled and contention.
	www.nv.cc.va.us /home/bholt/chap05/tsld008.htm (47 words)

	Toggit Certification Home for MCSE CCNA A+ study guides and test prep (Site not responding. Last check: 2007-11-07)
		Macintosh client The original Mac was a portable, selfcontained unit with a small monochrome screen, 128KB of memory, two serial ports, extended sound capabilities, and a single 400KB, 3.5-inch floppy disk.
		MAC is used in CSMA/CD and token-ring LANs as well as in other types of networks.
		The Intel 82385 cache controller chip was used with fast static RAM on some systems to increase performance, but more up-todate processors include cache-management functions on the main processor.
	www.toggit.com /Library/pedia/techno.asp?Term=m&Techno=Letter (8632 words)

	What is MAC Layer? - A Word Definition From the Webopedia Computer Dictionary (Site not responding. Last check: 2007-11-07)
		The Media Access Control Layer is one of two sublayers that make up the Data Link Layer of the OSI model.
		The MAC layer is responsible for moving data packets to and from one Network Interface Card (NIC) to another across a shared channel.
		The MAC sublayer uses MAC protocols to ensure that signals sent from different stations across the same channel don't collide.
	www.webopedia.com /quick_ref/MAC_layer.html (269 words)

	MAC :: Media Access Control
		MAC / Media Access Control address is the unique identifier assigned to every piece of hardware or node on a network.
		In IEEE 802 networks, the Data Link Control (DLC) layer of the OSI Reference Model is divided into two sublayers: the Logical Link Control (LLC) layer and the MAC / Media Access Control address layer.
		The MAC / Media Access Control address consists of hexadecimal code stored on a ROM chip in the computer's network interface care (NIC).
	www.inforingpress.com /computer-careers/mac.htm (446 words)

	802.11 MAC layer
		The following section describes the common Media Access Control layer used by the 802.11 family of standards.
		Each node in a 802.11 network is identified by its MAC address (exactly the same as Ethernet a 6 byte - 48 bit value).
		For Control Frames the associated identity of the transmitting station.
	www.zytrax.com /tech/wireless/802_mac.htm (765 words)

	Media Access Control layer - a Whatis.com definition (Site not responding. Last check: 2007-11-07)
		In the Open Systems Interconnection (OSI) model of communication, the Media Access Control layer is one of two sublayers of the
		Ethernet is an example of a protocol that works at the Media Access Control layer level.
		The other Data Link Control sublayer is the Logical Link Control layer.
	whatis.techtarget.com /gDefinition/0,294236,sid7_gci755784,00.html (128 words)

	Improving Performance of Adaptive Media Access Control Protocols for High-Density Wireless Networks (Site not responding. Last check: 2007-11-07)
		The problems of intermittent disconnection, high error rate and collision in high-density wireless networks cause degradation in the performance of wireless media access control protocols, such as slotted ALOHA Time Division Multiple Access (slotted ALOHA/TDMA) and Direct Sequence Code Division Multiple Access (DS/CDMA).
		We propose adaptive techniques for improving performance of media access protocols through awareness of the mobile communication environment.
		Upon detection and notification of these conditions by snooping devices, the media access control layer adapts its operation and synchronization accordingly to reduce delay and loss of bandwidth.
	csdl2.computer.org /persagen/DLAbsToc.jsp?resourcePath=/dl/proceedings/&toc=comp/proceedings/ispan/1999/0231/00/0231toc.xml&DOI=10.1109/ISPAN.1999.778958 (277 words)

	Wireless Media Access Control (ResearchIndex) (Site not responding. Last check: 2007-11-07)
		Since the wireless medium is inherently a shared resource, controlling channel access becomes a central theme that determines the fundamental capacity of the wireless network and has a dramatic impact on system complexity and cost.
		Therefore, our primary focus will be the design and implementation of Media Access Control (MAC) protocols for mobile wireless networks.
		4 An Adaptive Medium Access Control (MAC) Protocol for Reliabl..
	citeseer.ist.psu.edu /486480.html (546 words)

	A New Media Access Control Protocol for Single Hop WDM Networks (Site not responding. Last check: 2007-11-07)
		In conventional protocols, when the control packets collided with other ones or the packets didn’t get a data channel from the channel reservation mechanism, these packets should be retransmitted.
		But, when transmission distance becomes long, it takes a long time to transmit the control packets and the propogation dalay time will be long.
		In this paper, we propose a new media access protocol for single hop Wavelength Division Multiplexing (WDM) networks with a passive star topology.
	csdl2.computer.org /persagen/DLAbsToc.jsp?resourcePath=/dl/proceedings/&toc=comp/proceedings/icdcsw/2004/2087/01/2087toc.xml&DOI=10.1109/ICDCSW.2004.1284004 (254 words)

	MAC - MACro, Mandatory Access Control, Media Access Control, Message Authentication Code, Move, Add, Change, Multiple ...
		MAC - MACro, Mandatory Access Control, Media Access Control, Message Authentication Code, Move, Add, Change, Multiple Access Computers, Multiplexed Analog Component, Multiply ACcumulate
		Every attempt has been made to provide you with the correct acronym for MAC.
		Network Security - Access Code For Thursday, October 20, 2005 is EApJAqEPxx.
	www.auditmypc.com /acronym/MAC.asp (214 words)

	The Need for Media Access Control (ResearchIndex) (Site not responding. Last check: 2007-11-07)
		This paper demonstrates that the use of optical CDMA does not preclude the need for a media access control (MAC) layer protocol to resolve contention for the shared media.
		32 Performance analysis of carrier sense multiple access with c..
		16 Performance analysis of random access packetswitched code di..
	citeseer.ist.psu.edu /702825.html (510 words)

	Bone MAC media-access control magneto-optical drives mailing
		A 32-bit proprietary expansion bus first introduced by IBM in 1987 for the IBM PS/2 range of computers and also used in the RS/6000 series.
		A network in which all nodes share the cable using a media-access control (MAC) scheme.
		A transceiver that attaches to the AUI port on an Ethernet adapter and provides electrical and mechanical attachments to fiber-optic, twisted-pair, or other mdia.
	www.ssiltd.co.uk /glossary?let=m (651 words)

	Control address access media (Site not responding. Last check: 2007-11-07)
		...Module: core When returning a document to the client the server looks for the first existing access control file from this list of names in every directory of the...
		...Apache HTTP Server Version 2.0 Apache Core Features These configuration parameters control the core Apache features, and are always available.
		...the news on the arguments that interest to you, you can from whichever part of the world control your e-mail or consult the forecasts of the time.Gloo is a dolphin and...
	www.remote-video-surveillance.org /control_address_access_media.php (322 words)

	Media Gateway Control Protocol from FOLDOC
		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.
		Previous: meatspace, meatware, Media Access Control, Media Access Unit, Media Converter
		Next: Medium Access Control, meeces, Meet, meg, mega-, megabits per second
	www.instantweb.com /d/dictionary/foldoc.cgi?MGCP (116 words)

	Publications (Site not responding. Last check: 2007-11-07)
		F., L. Fratta, J. Bannister, and M. GerlaRouting and Admission Control in the Multihop Wavelength-Division Optical Network, Computer Networks and ISDN System, Special Issue on Media Access Techniques for High-Speed LANs and MANs, vol.
		Kamath, J. Touch, and J. Bannister, The Need for Media Access Control in Optical CDMA Networks, IEEE Infocom 2004, March 2004.
		Gerla, M., M. Kovacevic, and J. Bannister, Optical Tree Topologies: Access Control and Wavelength Assignment," Computer Netowrks and ISDN Systems, Special Issue on Media Access Techniques for High-Speed LANs and MANs, vol.
	www.isi.edu /~joseph/paper.htm (672 words)

	Token Ring Network IEEE Standards Media Access Control (Site not responding. Last check: 2007-11-07)
		The MAC layer varies for different network types and is defined by standards IEEE 802.3 through IEEE 802.5.
		P802.3ae/D4.0 Draft IEEE supplement to ISO/IEC 8802-3 (IEEE 802.3)-- Media Access Control (MAC) Parameters, Physical Layer, and Management Parameters for 10Gb/s Operation
		IEEE 802.11a-1999 (ISO/IEC 8802-11:1999/Amd 1:2000(E)), Information technology—Telecommunications and information exchange between systems—Local and metropolitan area networks—Specific requirements—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) specifications—Amendment 1: High-speed Physical Layer in the 5 GHz band (An errata is available)
	www.fattyboombatty.com /inquester32863.htm (1520 words)

	What is MAC? - A Word Definition From the Webopedia Computer Dictionary (Site not responding. Last check: 2007-11-07)
		(2) When spelled Mac, short for Macintosh computer.
		OnDeckTech: Illinois Mac Server Consultants - Apple-Certified, 100% guaranteed support and consulting for your Apple/Mac computers, servers, network/internet.
		Citrix Systems: Citrix Systems Inc - Provides access infrastructure for the on-demand enterprise, including SSL accelerators, VPN security, remote access, and authentication solutions.
	www.webopedia.com /TERM/M/MAC.html (192 words)

	Tektronix: Network Management & Diagnostics > Management > Media Access Control (MAC)
		Tektronix: Network Management & Diagnostics > Management > Media Access Control (MAC)
		Selection of appropriate Transport Format for each Transport Channel depending on instantaneous source rate
		Multiplexing/demultiplexing of higher layer PDUs into/from transport blocks delivered to/from the physical layer on common transport channels
	www.tek.com /Measurement/network/management/mac_utran.html?wt=1024&link=/Measurement/network/management/mac_utran.html (82 words)

	MAC (Media Access Control) (Linktionary Related Entries and Web Links)
		MAC (Media Access Control) (Linktionary Related Entries and Web Links)
		Get info about the Encyclopedia of Networking and Telecommunicatons, 3rd edition (2001)
		All rights reserved under Pan American and International copyright conventions.
	www.linktionary.com /re/mac.html (95 words)

	DHCP (Dynamic Host Control Protocol)
		In operation, a BOOTP server listens for broadcasts from devices requesting configuration data and, using the device's media access control (MAC) address, looks in a table and replies with the various parameters - IP address, default router and so on.
		For example, if you assigned Bill's machine address X and it died and was replaced, you had to manually change the BOOTP table to the new MAC address.
		This is one of the gotchas with DHCP (every serious protocol has gotchas): If the DHCP server goes down or becomes unavailable for any reason (and if you try to run DHCP in a WAN environment, the risks are obviously greater), then the lease can't be renewed.
	www.networkworld.com /details/488.html (1219 words)

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