164 results

M.2    Wikipedia         

MAC address spoofing Technique for impersonating a different address then factory-assigned on a NIC. Since MAC addresses can be spoofed, examining MAC filtering logs may not provide any indication of an unauthorized host.   Wikipedia         

MAC Address Table Overflow             

MAC database instability When the same broadcast frames are received on a switch, an endless loop can occur. Ethernet frames do not have TTL so they are constantly forwarded, confusing the MAC address table.   Wikipedia         

Mac Mini Small form factor computer made by Apple. Released January 22, 2005.  Website  Wikipedia       

Mac Pro High-end workstation made by Apple. First released August 7, 2006.  Website  Wikipedia       

machine Tool powered by energy to perform a task.   Wikipedia         

machine code The lowest level programming    Wikipedia         

machine learning    Wikipedia         

MAchine-Readable Cataloging (MARC) Standard for items catalogued by libraries. Developed by Henriette Avram in the 1960s.  Wikipedia         

machine-readable data Data that can be understood by a computer.   Wikipedia         

Macintosh (Mac) Line of computers made by Apple. Commonly shortened to just Mac. First released January 24, 1984.  Website  Wikipedia       

Macintosh Portable  Released September 20, 1989.  Wikipedia         

macOS (formerly OS X, Mac OS) UNIX-based operating system from Apple for their Macintosh computers. 

Version Codename Release Date
Mac OS X 10.0 Cheetah 2001
Mac OS X 10.1 Puma 2001
Mac OS X 10.2 Jaguar 2002
Mac OS X 10.3 Panther 2003
Mac OS X 10.4 Tiger 2005
Mac OS X 10.5 Leopard 2007
Mac OS X 10.6 Snow Leopard 2009
Mac OS X 10.7 Lion 2011
OS X 10.8 Mountain Lion 2012
OS X 10.9 Mavericks 2013
OS X 10.10 Yosemite 2014
OS X 10.11 El Capitan 2015
macOS 10.12 Sierra 2016
  Wikipedia  Wikipedia (versions)       

macOS High Sierra (macOS 10.13) Released September 25, 2017.  Website  Wikipedia       

macroinstruction (macro) Combines a sequence of instructions into a single statement making them easily repeatable.   Wikipedia         

MafiaBoy Launched a series of DoS attacks.   Wikipedia         

Magnetic Ink Character Recognition (MICR) (check scanners)            

Mail Delivery Agent (MDA) Accepts mail form the MTA and preforms the actual delivery.   Wikipedia         

Mail Exchange (MX) DNS record.   Wikipedia         

Mail Transfer Agent (MTA) Used to forward email   Wikipedia         

Mail User Agent (MUA) An email client.   Wikipedia         

main memory Typically RAM in modern computers.   Wikipedia         

malicious software (malware) Unwanted code with malicious intent.   Wikipedia         

Malwarebytes Security software company based in San Jose, California. Founded in 2008.  Wikipedia  Website       

Man in the Middle (MITM)             

Management Information Base (MIB) SNMP component that defines the structure of SNMP management objects. The structure of these management objects is defined by a managed device's MIB. Interfaces and their details, such as errors, utilization, discards, packet drops, resets, speed and duplex, system memory, utilization of bandwidth, storage, CPU, and memory, are able to be monitored and reported via SNMP.   YouTube (SolarWinds)         

management ports Ports used for managing a network device.

AUX port
     PC Mag       

Manjaro Linux distribution based on Arch. First released July 10, 2011  Website  Wikipeida       

Mark Surman Executive director of the Mozilla Foundation.   Website  Wikipedia       

Markdown    Wikipedia         

Marking QoS mechanism that alters bits within a frame, cell, or packet to indicate how the network should treat that traffic.            

Markup    Wikipedia         

masking Replaces sensitive information with nonsensitive information. After replacement, the nonsensitive version looks and acts like the original.            

Master Boot Record (MBR) Type of boot sector found    Website  Wikipedia       

Master File Table (MFT) Part of NTFS. All metadata is stored in the MFT.   MSDN  Wikipedia       

Mathew Brady  Opened his own photogrophy studio in New York in 1844. May 18, 1822 - January 15, 1896  Wikipedia         

Matroska Multimedia Container Free, open source, and open standard   Wikipedia  Website       

Matroska Video Stream (MKV) Other file extensions: .mkv .mk3d .mka .mks   Wikipedia  Website  File.org     

Mavericks (OS X 10.9)   Wikipedia         

maximum password age Requires a user to change their password after a certain amount of time.            

Maximum Transmission Unit (MTU) The maximum size of the PDU each medium can transport.            

maximum-paths Paths that should be maintained for load balancing.            

maxwell One magetic line of force.            

McAfee Security software company based in Santa Clara, California. Founded in 1987. Bought by Intel in 2010 for $7.68 billion.  Wikipedia         

McAfee Endpoint    Website         

McAfee ePolicy Orchestrator (McAfee ePO) Uninstall: %PROGRAMFILES(X86)%\McAfee\Common Framework\frminst /forceuninstall   Website  McAfee Community       

Mean Time Between Failures (MTBF)    Wikipedia         

Media Access Control (MAC) Sublayer of OSI Layer 2.   Wikipedia         

Media Access Control address (MAC address) (aka: burned-in address, Ethernet hardware address (EHA), hardware address or physical address (not to be confused with a memory physical address)) Unique identifier assigned to a network interface controller (NIC) for communications at the data link layer of a network segment.   Wikipedia         

Medianet Cisco borderless service. Helps deploy and manage media applications. Metadata   YouTube  Cisco       

medium Storage or transmission channels or tools used to store and deliver information or data.            


megabyte (MB) 1 million bytes.            

Melissa Mass-mailing macro virus. Not considered as a worm as it was not a standalone program. Released by David L. Smith sometime around March 26, 1999.  Wikipedia         

Meltdown Vulnerability in Intel and ARM processors. Reported January 3, 2018.  Website  Wikipedia  ZDNet  The Verge (Processor flaw exposes 20 years of devices to new attack)  The Verge (How to protect your PC against the major 'Meltdown' CPU security flaw) 

memory Stores data temporarily or long-term.   Wikipedia         

memory address Identifies locations in memory with a physical address. Used by a device such as a CPU.   Wikipedia         

memory module Physical form factor of a memory stick. Two common types are Dual In-line Memory Module (DIMM) and Small Outline Dual In-line Memory Module (SO-DIMM).            

Meraki  Founded in 2006. Acquired by Cisco December 2012.  Website  Wikipedia       

Message Authentication Code (MAC)    Wikipedia         

message digest (hashing algorithm)

MD4 Basis for MD5 and SHA-1.
MD5 Algorithm used by IPsec, EIGRP, RIPv2, EIGRP, OSPF, IS-IS, and BGP for authentication. Uses a 128-bit shared secret key.
 Developed by Ron Rivest.  Wikipedia - MD4  Wikipedia - MD5       

Message of the Day (MOTD) Banner displayed as part of the shell prompt when logging into a system. Stored in /etc/motd on Linux.            

Message-Digest Algorithm 4 (MD4) Cryptographic hash function. Developed by Ronald Rivest in 1990. First full collision attack against MD4 was published in 1995.  Wikipedia         

Message-Digest Algorithm 5 (MD5) Widely used hash function producing a 128-bit hash value. Used as a checksum to verify data integrity, but only against unintentional corruption. Initially designed as a cryptographic hash function but its security has been compromised due to extensive vulnerabilities. Designed by Ronald Rivest in 1991 to MD4. Published in RFC 1321 April 1992.  Wikipedia         

Metadata Data that describes other data.   Wikipedia         

Metadata Anonymisation Toolkit (MAT) Toolbox composed of a GUI application, a CLI application and a library, to anonymize/remove metadata.   Website  Wikipedia       

metal-oxide-semiconductor field-effect transistor (MOSFET) Type of transistor.   Wikipedia         

method Processes that can be used by an object.   Wikipedia         

metric Quantitative value used to measure the distance to a given network in a routing table. Lower values indicate preferred routes.   Wikipedia         

Metro Ethernet (aka: metropolitan-area Ethernet, Ethernet MAN) MAN based on Ethernet. Packet-switched WAN.   Wikipedia         

Michael Dell Founder and CEO of Dell. Born February 23, 1965.  Website  Wikipedia       

Michael Widenius Co-founder of MySQL   Wikipedia         

Micro Channel architecture (MCA)    Wikipedia         

Micro Dual In-line Memory Module (Micro-DIMM) (55mm x 30mm) DDR – 172 pins, DDR2 and DDR3 – 214 pins.   Wikipedia         

microcontroller A tiny computer.   Wikipedia         

microkernel    Wikipedia         

Microsoft Tech company based in Redmond Washington. Founded April 4, 1975.  Website  Wikipedia       

Microsoft Access Type of DBMS   Wikipedia  Website       

Microsoft Azure Cloud solution from Microsoft. Initially released February 1, 2010.  Website  Wikipedia       

Microsoft Build 2018  May 7-9.  Website         

Microsoft Build 2019  May 6-8 in Seattle, WA at the Washington State Convention Center.  Website         

Microsoft Build 2020 First all-digital conference from Microsoft. May 19–21, 2020.  Website         

Microsoft Certified Solutions Expert (MCSE)    Website         

Microsoft Design Language (MDL)             

Microsoft Developer Network (MSDN)             

Microsoft Disk Operating System (MS-DOS)  Released in August 1981.  Wikipedia         

Microsoft Enterprise Mobility Suite (EMS)             

Microsoft Forefront Unified Access Gateway (UAG) Provides secure remote access to corporate networks for remote employees and business partners.   Wikipedia  Microsoft TechNet       

Microsoft Foundations Class Library (MFC)    Wikipedia         

Microsoft Lumia 640  Released March 2, 2015.           

Microsoft Lumia 950 Smartphone made by Microsoft. Released November 20, 2015.  Wikipedia         

Microsoft Office  First announced August 1, 1988. Released August 1, 1989 for Mac OS and November 19, 1990 for Windows.  Wikipedia         

Microsoft Office Specialist (MOS)    Website         

Move-VMStorage PowerShell cmdlet used to move a virtual machine   TechNet         

MSI X370 GAMING PRO CARBON (AM4 AMD X370 SATA 6Gb/s HDMI ATX) Motherboard from MSI. Released March 8, 2017.  Website  Newegg       

Multi-Function Device (MFD) (aka: All-In-One (AIO), multi-function product/printer/peripheral (MFP)) Incorporates several machines, or parts of a machine, into one. Typically used to refer to printer-like devices (scanners, copiers…). Can be used to refer to an all-in-one computer such as the iMac.   Wikipedia         

Microsoft Deployment Toolkit (MDT) The Microsoft Deployment Toolkit (MDT) provides a unified collection of tools, processes, and guidance for automating desktop and server deployments. In addition to reducing deployment time and standardizing desktop and server images, MDT offers improved security and ongoing configuration management.   TechNet         

Microsoft Fluent Design System (aka: Neon) New interface for Windows 10. Announced May 11, 2017  Website         

Microsoft Ignite 2017 Orlando, FL. September 25, 2017 September 29, 2017.  Website         

Microsoft Ignite 2018  September 24, 2018 - September 28, 2018.  Website         

Microsoft Inspire  July 15, 2018 - July 19, 2018.  Website         

Microsoft Official Academic Course (MOAC)    Website  Wiley       

Microsoft SQL Server A RDBMS from Microsoft   Wikipedia  Website       

Microsoft Surface The tablet that can replace your laptop. 

Surface October 26, 2012
Surface Pro February 9, 2013
Surface 2 October 22, 2013
Surface Pro 2
Surface Pro 3 June 20, 2014
Surface 3 May 5, 2015
Surface Pro 4 October 26, 2015
Surface Book

Microsoft Virtual Academy (MVA) Free Microsoft Training Delivered by Experts.   Website  Twitter  Facebook     

Microsoft Windows OS developed by Microsoft. 

OS Version Release Date
MS-DOS 1981
Windows 1.01 1985
Windows 2.0 1987
Windows 2.10
Windows 2.11
Windows 3.0
Windows 3.1
Windows NT 3.1
Windows 3.2
Windows NT 3.5 1994
Windows NT 3.51 1995
Windows 95 1995
Windows NT 4.0 1996
Windows CE
Windows 98
Windows 2000 2000
Windows Pocket PC
Windows ME
Windows XP 2001
Windows Server 2003
Windows Mobile
Windows Vista 2006
Windows Home Server
Windows Server 2008
Windows 7 2009
Windows Phone 7
Windows 2012
Windows 8 2012
Windows RT
Windows Phone 8
Windows 8.1 2013
Windows Phone 8.1
Windows 10 Technical Preview 2014
Windows 10 2015
  Website  Wikipedia       

Minecraft  Released November 18, 2011.  Wikipeddia         

Mini-DIN connector    Wikipedia         

Minicom Terminal emulator for Unix-like operating systems.   Wikipedia         

Minicomputer  Small computer developed in the mid-1960s.  Wikipedia         

Minimal Server Interface    TechNet blog         

minimum password age User must wait a certain amount of time before they are allowed to change passwords.            

minimum trust Access should not be granted unnecessarily or unconditionally.   Netacad         

Mint A Linux distribution.   Wikipedia         

MINUS Relational set operator. SQL command that combines rows from two queries and returns only the rows that appear in the first set but not in the second.            

mirroring Multiple drives have the same information across them for redundancy.   Wikipedia         

mkdir Command that creates a directory.   Wikipedia         

MKS system of units    Wikipedia         

Mobile World Congress (MWC)    Website         

Mobile World Congress 2018 (MWC 2018)  February 26, 2018 - March 1, 2018.  Website         

MODE Configures a system device.            

Model-View-ViewModel (MVVM)  Announced in 2005  Wikipedia         

modem Translates digital signals to analog.   Wikipedia         

Modern Language Association (MLA) paper style   Wikipedia         

modulo Returns the remainder.   Wikipedia         

modulus % (aka: absolute value) Returns the remainder in most programming languages.   Wikipedia (Modulo operation)  Wikipedia (Absolute value)       

Mono "A software platform designed to allow developers to easily create cross platform applications."   Website  Wikipedia       

monoalphabetic substitution cipher (Caesar cipher)   Wikipedia         

monolithic kernel Type of kernel used by Linux.   Wikipedia         

Moore's law The observation that the number of transistors in a dense integrated circuit doubles approximately every two years. Named after Gordon Moore. Published on April 19, 1965 stating a one year rate of change. Revised the rate in 1975 to approximately every two years.  Wikipedia         

MORE Displays output one screen at a time. Can be used to open files in the command line.   Wikipedia         

Morto Worm allowing unauthorized access. First detected on August 27, 2011   Microsoft         

motherboard (aka: logic board,   Wikipedia         

Motion Cisco borderless service. Unifies the network. Secures mobile devices. Works across any kind of network.   YouTube  Cisco       

Moto 360 Smartwatch made by Motorola that runs Android Wear. First generation released September 5, 2014.  Website  Wikipedia       

Motorola    Wikipedia         

Mountain Lion (OS X 10.8)   Wikipedia         

mountvol Creates, deletes, or lists a volume mount point. Mountvol is a way to link volumes without requiring a drive letter.   TechNet         

MOVE Moves one or more files from one directory to another directory in DOS. Use mv in UNIX-based operating systems.

syntax: move [file name to move] [destination]


Move-VM PowerShell cmdlet used to move a virtual machine to a new Hyper-V host.   TechNet         

Moving Picture Experts Group (MPEG)    Wikipedia         

Mozilla Festival (MozFest) The world's leading festival for the open internet movement.   Website         

MPEG 4 Audio (M4A) MP4 for audio only. Generally used with AAC and Apple Lossless formats.   Wikipedia         

MPEG-4 Part 14 (MP4) File format used for audio and video.   Wikipedia         

Multi-Mode Fiber (MMF) (aka: multimode fiber) Most often used in horizontal cabling. Can transmit up to 10Gbps for up to 550 meters (1,804 feet) or just over one-third of a mile.   Wikipedia         

multiaccess network             

Multiaccess OSPF             

Multiarea OSPF             

multicast (one to many) Sending a packet from one host to a selected group of hosts, possibly in different networks. Saves bandwidth by only sending one copy of the traffic. IPv4 addresses are used for multicast addresses. reserved for link-local reserved for globally scoped addresses

multicast Domain Name System (mDNS) resolves hostnames in networks without a local name server.   Wikipedia         

multiple frame transmission Multiple copies of unicast frames are sent to the destination.            

Multiple Input, Multiple Output (MIMO) Achieves higher throughput by using multiple antennas to transmit and receive. Found in IEEE 802.11n and above.    Wikipedia         

Multiple Spanning Tree Protocol (MSTP)             

Multiplexer (MUX)             

multiplexing Process where hosts can support multiple simultaneous sessions over a single link.   Wikipedia         

Multiprotocol Label Switching (MPLS) A packet-switched WAN. Can be used to deliver any type of packet over a WAN. Elements include; Customer Premises Equipment (CPE), Customer Edge (CE), Edge Label Switch Router (ELSR), Provider Edge (PE), Label, Switch Router (LSR), and Provider (P) routers. Header is 32 bit long, which contains the label.    Wikipedia  YouTube       

Musical Instrument Digital Interface (MIDI)    Wikipedia         

mutual induction When a coil induces voltage into another coil.            

mv UNIX command that moves files. Use move on Windows-based systems.

syntax: mv (file name to move) (destination)

MySQL A popular RDBMS.  First released May 23, 1995.  Website  Wikipedia  YouTube (Derek Banas)     

MySQL Improved (MySQLi) Connects to a MySQL database using PHP.   Wikipedia         

MySQL server A database server.   Wikipedia         

mysqli_fetch_array Function that fetches an array. Syntax: mysqli_fetch_array(result,resulttype);   PHP Manual  W3Schools