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Wireless Networking Glossary
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| MAC address | Media Access Control address. Computer's unique, 48-bit hardware number. (On Ethernet LAN, same as Ethernet addresses.) Method of forwarding traffic. |
| MAC Encapsulated Routing | Transfer of data packets encapsulated within frames. |
| MAN | Metropolitan Area Network. Interconnects users with computer resources in a geographic area larger than that covered by a large LAN but smaller than area covered by WAN. See 802.16. |
| Mbps | Megabits Per Second. Measure of bandwidth capacity or transmission speed; stands for one million bits per second. |
| MBS | Maximum Burst Size. ATM parameter describing maximum number of cells that may be sent at the line rate. Used by following classes of service: rt-VBR (real time Variable Bit Rate), nrt-VBR (non-real time Variable Bit Rate), and GFR (Guaranteed Frame Rate). |
| MDS | Multi-Point Distribution System. |
| Mega | Prefix to indicate one million (e.g. Mega-bit). Abbreviated M |
| MHU | Multiple Hospitality Unit. Hotels, motels, resorts. See MTU. |
| MHz | Million Hz. A measure of radio frequency |
| MIB | Management Information Base. Database of objects that can be monitored by NMS. Both SNMP and RMON use standardized MIB formats. |
| MIDI | Musical Instrument Digital Interface, or MIDI, is a system designed to transmit information between electronic musical instruments. The MIDI standard was published in August 1983 |
| MIME | Multipurpose Internet Mail Extensions |
| MIPS | Million Instructions per Second. Measurement of processor speed |
| MLPP | Multi-Level Precedence and Pre-emption |
| MLPPP | Multi-Link Point-to-Point Protocol. Groups multiple physical PPP links into single logical pipe. |
| MMDS | Multi-channel Multi-Point Distribution Service. Uses the 2.1-2.7 GHz frequency band. The success of this technology has been about as poor as its cousin, LMDS. |
| MN | Mobile Node. An internet term for a mobile device capable of IP communications. See Mobile IP |
| Mobile Node | An IP network node that has both a static address and a 'care-of' address associated with it. IP packets can be routed to it via a Home Agent (at its static address) and a Foreign Agent (at it's care-of address) |
| Mobile Wireless | Use of wireless devices or systems aboard motorized, moving vehicles; examples include the automotive cell phone and PCS (personal communications services) Three digital wireless telephone technologies are TDMA, GSM and CDMA. See Fixed Wireless, IR Wireless, Portable Wireless, and Wireless. |
| MODBUS | SCADA Protocol |
| MP3 | MPEG-1 Audio Layer-3. Standard technology and format for compression of a sound sequence into very small file (about one-twelfth the size of original file) while preserving original level of sound quality when played. |
| MPEG | The Moving Picture Experts Group (MPEG) is a small group charged with the development of video and audio encoding standards. |
| MSB | Most Significant Bit or Byte. Compare with LSB |
| MSO | Multisystem Operator. Cable company. |
| MTTR | Mean Time To Repair. Average time required to perform corrective maintenance in event of system failure. Measures time between service interruption and service restoration. Includes problem diagnosis and problem repair. |
| MTU | Message Transfer Unit. Multiple Tenant Unit. Building or group of building that can accommodate more than one tenant. 3 segments are MCU, MDU, MHU. |
| Multipath | A radio link between the transmitter and receiver comprised of multiple paths which include intermediate reflections from various surfaces, usually due to non-line of sight communication paths |
| Multiplexing | Sending multiple signals or streams of information on a carrier at the same time in the form of a single, complex signal and then recovering the separate signals at the receiving end. In analog transmission, signals are commonly multiplexed using FDM, in which carrier bandwidth is divided into subchannels of different frequency widths, each carrying a signal at the same time in parallel. In digital transmission, signals are commonly multiplexed using TDM, in which the multiple signals are carried over the same channel in alternating time slots. In some optical fiber networks, multiple signals are carried together as separate wavelengths of light in a multiplexed signal using DWDM. |
| Mux | Transmission device, see Multiplexing. Combines several signals for transmission over a single medium. A demultiplexer (Demux) completes the process by separating multiplexed signals from a transmission line. |
| mW | milli-Watt |
| MX | Mail Exchange (internet mail server) |