a

267 results

A DNS host address record.   Wikipedia  RFC 1035       

A5 Used to encrypt GSM cell phone communications.            

AAA IOS Configuration

  • Router(config)# username (name>) privilege 15 secret (password)
  • Router(config)# aaa new-model
  • Router(config)# aaa authentication login { default | (list-name) } local enable
  • Router(config)# aaa local authentication attempts max-fail (number-of-unsuccessful-attempts)
  • show aaa local user lockout
  • clear aaa local user lockout { username (username) | all }
  • show aaa user {all | unique id}
  • show aaa sessions
  • RADIUS
  • Router(config)# radius-server host (server IP)
  • Router(config)# radius-server key (key)
  • TACACS+
  • Router(config)# tacacs-server host (server IP) single-connection
  • Router(config)# tacacs-server key (key)
  • //example
  • Router(config)# username JR-ADMIN secret Str0ngPa55w0rd
  • Router(config)# username ADMIN secret Str0ng5rPa55w0rd
  • Router(config)# aaa new-model
  • Router(config)# aaa authentication login default local-case enable
  • Router(config)# aaa authentication login TELNET-LOGIN local-case
  • Router(config)# aaa local authentication attempts max-fail 3
  • Router(config)# line vty 0 4
  • Router(config-line)# login authentication TELNET-LOGIN
   Wikipedia  RFC 6377  Cisco  Netacad   

AAAA DNS IPv6 host address record.   Wikipedia  Wikipedia  RFC 3596     

Aaron Swartz Developer involved with several projects including RSS, Markdown, and Reddit.  November 8, 1986 - January 11, 2013.  Wikipedia         

absolute value |u| = c is equivalent to u = c or u = -c            

AC adapter Power adapter that plugs into a standard wall outlet and provides direct current.            

AC power plug Standard way of accessing electricity in various parts of a building.   Wikipedia         

accdb Microsoft Access file.    Wikipedia         

Accelerated Graphics Port (AGP) Legacy port for graphics cards used before PCI.   Wikipedia         

Accelerated Processing Unit (APU)    Wikipedia         

Acceptable Use Policy (AUP) Defines what users may or may not do with regard to the network, website or information system.   Wikipedia         

access attack An attack that allows unauthorized access to computer resources.   Wikipedia         

Access Control Entry (ACE) (aka: ACL statement) A single line in a ACL. Can have sequence numbers to identify each entry.   Wikipedia         

Access Control List (ACL) Set of rules to block or allow packets. ACLs can also be used for specifying internal hosts for NAT and identifying traffic for QoS. Can have one ACL per interface, per direction, per protocol. Two types, standard ACL and extended ACL. IPv4 ACLs can be named or numbered while IPv6 ACLs can only be named. IPv6 ACLs are equivalent to IPv4 extended ACLs.   Wikipedia         

access control system Verifies a person's identity and that they are an authorized user.   Wikipedia         

Access Layer Where users connect to or "access" the network.   Wikipedia  Netacad  Netacad  Cisco   

Access Point (AP) A connection, typically wireless, into a network.   Wikipedia         

Access Point Name (APN)    Wikipedia         

Access server Device used for remote entry into a network to configure devices.   Wikipedia  YouTube       

Accounting and auditing             

Acer  Founded September 1976.  Website  Wikipedia       

Acer Predator 21 X 21' laptop from Acer with two NVIDIA GTX 1080s and a $8,999 price tag. To be released Feburary 2017.  Website  The Verge       

acknowledgment number (ACK) 1-bit flag in a TCP header. Acknowledges a valid field.   Wikipedia  Wikipedia       

ACL Statement (aka: Access Control Entry) A single line in an ACL.            

Acronis True Image    Website         

Action Center (Formerly: Charms bar) Offers quick acces to settings and notifications. First introduced with Windows Phone 8.1.  Wikipedia         

action query Adds, deletes, or changes data in a table.            

Active Directory (AD) Service in Windows Server that allows for easy managment of user accounts and security information.   Wikipedia         

Active Directory Functional Levels Controls which advanced features are available in the domain or forest.   TechNet         

Active Directory Lightweight Directory Services (AD LDS) (Previously: Active Directory Application Mode (ADAM)) Light-weight implementation of AD DS.   Wikipedia         

active hub (deprecated) Type of hub that amplifies and cleans up the signal before broadcasting to all other ports. Deprecated by IEEE 802.3 as of 2011.  Wikipedia         

Active Server Pages (ASP) Server-side scripting language for dynamic webpages developed by Microsoft.   Wikipedia         

active state Where the router actively searches for a new path to the destination in an EIGRP route. An EIGRP route would go into the active state if the successor is down or if there was no feasible successor.   Wikipedia         

Active Threat Level Analysis System (ATLAS) Tool from Arbor Networks used to view network threats.   Website         

Active Virtual Forwarder (AVF) Each gateway with an assigned virtual MAC address. GLBP group can have up to 4 AVFs. Extra AVFs (more than 4) become SVF.    Wikipedia         

Active Virtual Gateway (AVG) The first router elected as a gateway in a GLBP group. Highest priority is elected. Assigns a virtual MAC address to each member of the GLBP group. Next highest priority of remaining gateways is elected the SVG.   Wikipedia         

Active-Matrix Organic Light-Emitting Diode (AMOLED) Type of display that only turns on the necessary pixels to save power and have more accurate color.   Wikipedia         

active-standby Mode of NIC redundancy that uses only one available NIC at a time.             

ActiveX Allows for interactive and multimedia elements to integrate into web pages. Developed by Microsoft. Initially released in 1996.  Wikipedia         

ad hoc Wireless LAN topology. When two or more devices are directly connected through a wireless network without extra infrastructure.   Wikipedia  Wikipedia       

Adam Osborne Founder of Osborne Computer Corporation (OCC). March 6, 1939 - March 18, 2003.  Wikipedia         

Adaptive design             

Adaptive Security Appliance (ASA)    Wikipedia         

Adaptive Voltage and Frequency Scaling (AVFS)             

Add-Computer PowerShell command to add a computer to a domain or workgroup.

PS C:\> Add-Computer -DomainName Domain01 -Restart
PS C:\> Add-Computer -WorkGroupName WORKGROUP-A
   TechNet         

add-in-board (AIB) Another term for a GPU on a dedicated card that can be added to a computer.   Wikipedia         

Address Family (AF)             

address resolution Used to find the MAC address associated with an IPv6 unicast address. Similar to ARP for IPv4.            

Address Resolution Protocol (ARP) Resolves IPv4 address to MAC address. Maintains a mapping table.   Wikipedia         

adduser Bash command to add a user account. sudo adduser username   Linuxers         

adjacency database One of the three OSPF databases. Contains the neighbor table.   Wikipedia         

Administrative Distance (AD) Determines the route to install into the IP routing table. The left side of the brackets represent the AD [1/0]. The trustworthiness of a route source in a routing table. 0 = Connected, 1 = Static, 5 = EIGRP summary, 20 = External BGP (eBGP), 90 = internal EIGRP, 100 = IGRP, 110=OSPF, 115=IS-IS, 120=RIP, 170=External EIGRP, 200=Internal BGP, 255=unknown   Wikipedia         

administrative shares (aka: hidden shares) Identified with a dollar sign ($) at the end of the share name.   Netacad         

Adobe Software company based in San Jose, California. Founded February 28, 1982.  Website  Wikipedia       

Advanced Audio Coding (AAC) Lossy audio compression format. Standardized in April 1997as the successor to MP3 files.  Wikipedia         

Advanced Data Communication Control Procedures (ADCCP) Layer 2 protocol.   Wikipedia         

Advanced Encryption Standard (AES) (aka: Rijndael) A type a data encryption. More efficient than DES. Three key lengths; 128, 192, and 256 bits. Can be used by IPsec to encrypt data. Symmetric cryptosystem. First published in 1998.  Wikipedia         

Advanced Encryption Standard - Cipher Block Chaining (AES-CBC) Used with IPsec Encapsulating Security Payload (ESP). Published September 2003.  RFC 3602         

Advanced Host Controller Interface (AHCI)    Website  Wikipedia       

Advanced Inspection and Prevention (AIP) Adds IPS capabilities to a Cisco ASA.   Netacad         

Advanced Inspection and Prevention Security Services Card (AIP-SSC)    Netacad         

Advanced Inspection and Prevention Security Services Module (AIP-SSM)    Netacad         

Advanced Micro Devices (AMD) Processor manufacturer. Founded May 1, 1969.  Wikipedia         

Advanced Research Projects Agency Network (ARPANET) Funded by the U.S. Department of Defense. Helped create the first router. Originated in 1986.  Wikipedia         

Advanced Technology Attachment (ATA) The predecessor to SATA. Originally developed in 1986 by Wester Digital under the name Integrated Drive Electronics (IDE).  Wikipedia  TechTerms       

Advanced Technology eXtended (ATX) Motherboard standard developed by Intel. Released in 1995.  Wikipedia         

Advantech A Taiwanese company that manufactures industrial computers.    Wikipedia  Website       

AES-GCM (Galois/Counter Mode)             

African Network Information Centre (AfriNIC)      Website       

Ageia Originally developed what would become PhysX. Founded in 2002. Acquired by Nvidia in 2008.  Wikipedia         

aggregate functions (COUNT, MIN, MAX, and AVG) special functions that perform arithmetic computations over a set of rows. Usually used in conjunction with a GROUP BY clause to group the output of aggregate computations by one or more attribute rows that match a given condition.            

Agile software development Set of principles for software development under which requirements and solutions evolve through the collaborative effort of self-organizing cross-functional teams.   Wikipedia         

Agile Software Development (ASD)    Wikipedia         

AirPods Wireless headphones made by Apple. Released December 13, 2016.  Website  Wikipedia       

AirPrint Allows Apple devices running macOS or iOS to wirelessly print to a compatible printer or print server. First released November 22, 2010.  Wikipedia         

Akamai Technologies, Inc. Content Delivery Network (CDN) and cloud services provider headquartered in Cambridge, Massachusetts. Founded in 1998.  Website  Wikipedia       

Alan Cooper The father of Visual Basic. Born June 3, 1952.  Wikipedia         

Alan Turing  June 23, 1912 - June 7, 1954  Wikipedia         

Alexander Graham Bell Inventor of the first practical telephone. March 3, 1847 - August 2, 1922.  Wikipedia  The Guardian       

Algorithm Step-by-step procedure for calculations.   Wikipedia  Khan Academy       

alias (AS) Another name assigned to a column name in the output of query in a database.   Wikipedia         

Alienware Area 51 (2017) Computer from Dell. First OEM to use AMD Threadripper. Announced at E3 2017 June 12, 2017. Available for pre-order June 27, 2017.  Website  Wikipedia  PC World     

AllJoyn  First released December 21, 2013.  Wikipedia         

Allo Messaging app from Google powered by machine learning. Announced May 18, 2016.  CNET         

Alphabet Inc. Parent company of Google. Google was recatagorized under the new company on October 2, 2015  Website  Wikipedia       

Alps Type of keyboard switch.   Wikipedia         

alternate ports (backup) Configured in a blocking state to prevent loops. Neither end of the trunk is a root port.            

Alternating Current (AC) The flow of current will change direction. Can be transformed to step up or step down the voltage. Favored by Nikola Tesla.  Wikipedia         

Amazon Echo (2017) Smart speaker from Amazon Announced September 27, 2017. Released October 31, 2017.  Website  Wikipedia  The Verge     

Amazon Echo  Widely available June 23, 2015.  Website  Wikipedia       

Amazon Echo Plus Smart speaker from Amazon. Announced September 27, 2017. Released October 31, 2017.  Website  Wikipedia  The Verge     

Amazon Echo Spot Smart alarm clock from Amazon. Announced September 27, 2017. Released December 19, 2017.  Website  Wikipedia  The Verge     

AMD Athlon Family of x86 microprocessors from AMD. First released June 23, 1999.  Wikipedia         

AMD Athlon 600 First of the CPUs in the family of Athlon microprocessors released from AMD. Released June 23, 1999.  Wikipedia         

AMD Athlon 650 Microprocessor from AMD. Released August 9, 1999.  Wikipedia         

AMD Athlon XP 2600+ Microprocessors from AMD. Released August 21, 2002.  Wikipedia         

AMD EPYC Family of server chips from AMD based on the Zen microarchitecture. Announced May 16, 2017. Released June 20, 2017.  Website  Wikipedia       

AMD FirePro W7170M  Released October 2, 2015.  Website  Wikipedia       

AMD FX-9590 (8-Core 4.7 GHz Socket AM3+ 220W) Released July 6, 2013.  Wikipedia         

AMD Radeon Pro Duo (2016) Professional GPU from AMD. Announced May 14, 2016. Released April 26, 2016.  Website  Wikipedia (Radeon Pro)  Wikipedia (RX 300 series)  Press Release   

AMD Radeon Pro Duo (2017) Professional GPU from AMD. Announced April 24, 2017.  Website  Wikipedia  Press Release     

AMD Radeon Pro WX 7100 Professional GPU from AMD. Released November 2016.  Wikipedia         

AMD Radeon RX 560 GPU from AMD. Released May 18, 2017.  Website  OC3D.net       

AMD Radeon RX 580 GPU from AMD. Released April 18, 2017  Website  Wikipedia       

AMD Radeon Vega Frontier Edition First graphics card in the Vega architecture family from AMD. Announced May 16, 2017. Available for pre-order June 27, 2017. Released July 1, 2017.  Website  Wikipedia  Tom's Hardware  Newegg   

AMD Ryzen 3 1200 Zen architecture CPU from AMD in the Ryzen family. Released July 27, 2017.  Website  Wikipedia  Press Release     

AMD Ryzen 3 1300X Zen architecture CPU from AMD in the Ryzen family. Released July 27, 2017.  Website  Wikipedia  Press Release     

AMD Ryzen 5 1600X (6 cores, 12 threads, 3.6 GHz, 4.0 GHz boost, 95w TDP, 16 MB L3 cache) CPU from AMD. Released April 11, 2017.  Website  Wikipedia       

AMD Ryzen 7 1700 CPU from AMD. Released March 2, 2017.  Website  Wikipedia       

AMD Ryzen 7 1700x CPU from AMD. Released March 2, 2017.  Website  Wikipedia       

AMD Ryzen 7 1800x CPU from AMD. Released March 2, 2017.  Website  Wikipedia       

AMD Ryzen Threadripper Line of microprocessors in the Ryzen family. To be released summer 2017.  Website  Wikipedia       

AMD Ryzen Threadripper 1900X Zen CPU from AMD. Released August 31, 2017.  Website  Wikipedia       

AMD Ryzen Threadripper 1920X Zen CPU from AMD. 12 core, 24 thread, 3.5GHz base clock, 4.0GHz boost clock, $799 MSRP. Released August 10, 2017.  Website  Wikipedia  Ars Technica     

AMD Ryzen Threadripper 1950X Zen CPU from AMD. 16 core, 32 thread, 3.4GHz base clock, 4.0GHz boost clock, $999 MSRP. Released August 10, 2017.  Website  Wikipedia  Ars Technica     

AMD64    Wikipedia         

American National Standards Institute (ANSI) Private non-profit organization that oversees the development of voluntary consensus standards for products, services, processes, systems, and personnel in the United States.   Wikipedia         

American Psychological Association (APA) paper style    Wikipedia  Microsoft       

American Registry for Internet Numbers (ARIN)  Founded April 18, 1997.  Wikipedia  Website       

American Standard Code for Information Interchange (ASCII) A fixed-length binary character-encoding scheme.   Wikipedia         

American Wire Gauge (AWG) Standard for wire sizes   Wikipedia         

ampere (amp) (A) 1 coulomb per second.            

ampersand &

Decimal Hexadecimal Binary
38 26 00100110
   Wikipedia         

Amplitude Modulation (AM)    Wikipedia         

An incorrect volume label was entered for this drive. Check the current drive letter assignment to the drives and then specify the correct volume label. You can get this information from Disk Administrator.    TechNet         

Anaconda GUI installer for several Operating Systems including RHEL and Fedora.   Wikipedia         

analog    Wikipedia         

analog-to-digital converter (ADC)    Wikipedia         

André-Marie Ampère The SI unit of current, the ampere, is named after him.   Wikipedia         

Andrew Grove (Andy Grove) Former CEO of Intel. September 2, 1936 - March 21, 2016  Wikipedia         

Android Linux-based operating system designed primarily for touchscreen mobile devices. First released September 23, 2008.  Website  Wikipedia       

Android Nougat (aka: Android N, Android 7.0) Seventh major version of the Android. Released August 22, 2016.  Website  Wikipedia       

Android Oreo (Android O)  First preview available March 23, 2017. Officially available in beta May 17, 2017. Name unveiled August 21, 2017. Released August 21, 2017.  Website  Wikipedia  Ars Technica     

Android Wear Variation of android for wearable devices. First released March 18, 2014.  Wikipedia  Website       

Android, Inc. Original developer of the Android operating system. Founded in Palo Alto, California October 2003 by Andy Rubin, Rich Miner, Nick Sears, and Chris White. Bought by Google August 17, 2005.  Wikipedia  Engadget       

AngularJS (aka: Angular) Web framework based on JavaScript and maintained by Google. First released October 20, 2010.  Wikipedia  W3Schools       

Anniversary Update (aka: Redstone) Update for Windows 10. Released August 2, 2016.  Wikipedia  Windows Blogs       

Anomaly-based intrusion detection Detects unusual network traffic patterns based upon a baseline of normal network traffic.   Wikipedia         

ANSI SQL data types Basic types include; NUMBER, NUMERIC, INTEGER, CHAR, VARCHAR, and DATE. Support is different in each RDBMS.   Microsoft Access Equivalent ANSI SQL Data Types         

answer file Used to automate the installation process. Typically used for operating systems.            

Antec Computer case and accessory maker. Founded 1986. Located in Fremont California.  Wikipedia         

antistatic wrist strap Equalize the electrical charge between a person and the equipment.   Wikipedia  Netacad       

antivirus software (aka: anti-virus software or AV software) Typically host-based. Used to detect and remove viruses from computers. Does not prevent viruses from entering a system or system.   Wikipedia  Netacad       

Antonio Meucci Inventor of the telephone. April 13 1808 - October 18 1889  Wikipedia         

anycast (one to-nearest)   Wikipedia         

AOL Instant Messenger (AIM)  Released May 1997.  Wikipedia         

Apache HTTP server.

ServerRoot:
/usr/local/apache2
/etc/apache2 Debian
/etc/httpd
"C:/Program Files/Apache Software Foundation/Apache2.2" Windows
 Released as Apache 1.0 December 1, 1995.  Website  Wikipedia  Apache HTTP Server Wiki     

Apache Lucene Free and open-source information retrieval software library. Written by Doug Cutting in 1999.  Website  Wikipedia       

Apache Subversion (SVN) Software versioning and revision control system distributed as open source under the Apache License. First released October 20, 2000.  Website  Wikipedia       

Apollo 11  Landed on the moon July 20, 1969.  Wikipedia         

Apollo 8 First manned spacecraft to leave Earth's orbit. Launched December 21, 1968.  Wikipedia         

Apollo 8 television broadcast Crew of Apollo 8 read the first 10 verses of the Book of Genesis as they orbited the moon on Christmas Eve. Most watched television program of its time. Aired December 24, 1968.  Wikipedia  PBS       

App Velocity Cisco borderless service. Optimizes the user experience of applications.     Cisco  Cisco     

append Adds to the end of a file. Use >> instead of >.   Wikipedia         

Apple Tech company. Founded by Steve Jobs and Steve Wozniak on April 1, 1976.  Wikipedia         

Apple DOS OS used on the Apple II. Released in 1978.  Wikipedia         

Apple Fifth Avenue Apple Store located at 767 Fifth Avenue New York, NY 10153. Opened May 19, 2006.  Website  Wikipedia  Press Release  This Day in Tech History   

Apple File System (APFS) File system from Apple to replace HFS and HFS+. Quietly announced at WWDC June 13, 2016. Introduced to iOS devices in iOS 10.3 March 27, 2017.  Wikipedia         

Apple Filing Protocol (AFP) (formerly: AppleTalk Filing Protocol) Proprietary network protocol and part of the Apple File Service (AFS) that offers file services for macOS and the classic Mac OS. One of several file sharing services including SMB, NFS, FTP, and WebDAV.   Wikipedia         

Apple IBM Motorola (AIM) Alliance between Apple, IBM, and Motorola to create PowerPC. Formed October 2, 1991.  Wikipedia         

Apple II  Released June 10, 1977.  Wikipedia         

Apple LaserWriter Laser printer with built-in PostScript interpreter from Apple Computer, Inc. One of the first laser printers available to the mass market. Released March 1, 1985. Discontinued February 1, 1988.  Wikipedia         

Apple Lisa  Released January 19, 1983.  Wikipedia         

Apple Lossless Audio Codec (ALAC) (aka: Apple Lossless) Lossless audio format developed by Apple. First released April 28, 2004.  Wikipedia         

Apple Mail    Wikipedia         

Apple Park (aka: Apple Campus 2, Apple Spaceship Campus) Opening to employees in April 2017.  Wikipedia  Apple Press Release       

Apple Services System Status    Website         

Apple Special Event "Let's meet at our place." First event to be held at the Steve Jobs Theater in the Apple Park Campus. September 12, 2017.  Wikipedia         

Apple Special Event "Gather round" September 12, 2018.  Wikipedia         

Apple Special Event "It's show time." Held at the Steve Jobs Theater in the Apple Park campus March 25, 2019.  Wikipedia         

Apple Watch (aka: Apple Watch Series 0) Smartwatch made by Apple.   Website  Wikipedia       

Apple Watch Nike + Model of the Series 2 Apple Watch. Released October 28, 2016.  Website  Wikipedia       

Apple Watch Series 1 Smartwatch made by Apple.   Website  Wikipedia       

Apple Watch Series 2 Smartwatch from Apple.  Announced September 7, 2016. Released September 16, 2016.  Website  Wikipedia  Press Release     

Apple/UNIX (A/UX)    Wikipedia         

AppleTalk Proprietary suite of networking protocols developed by Apple for their Macintosh computers.   Wikipedia         

Application Software designed to help the user perform specific tasks.   Wikipedia         

Application Centric Infrastructure (ACI)             

application firewall Filters Layers 3,4,5, and 7. Mostly done with software.            

Application Layer (OSI Layer 7) Abstraction layer in the internet protocol suite (TCP/IP) and the OSI model. Allows access to network services such as file transfer, electronic mail, and database access.   Wikipedia         

Application Layer Services Programs that interface with the network and prepare the data for transfer.    Wikipedia         

Application Log Event log in Windows that contains information about the software running on the system. Three levels of security are: Information, Warning, and Error.            

Application Programming Interface (API) Lets programs talk to eachother.    Wikipedia  PC Mag       

Application System/400 (AS/400)  Introduced June 21, 1988.  Wikipedia         

Application-Specific Integrated Circuits (ASIC) Often used in multilayer switches. With the right software, can forward packets without the CPU.   Wikipedia         

apropos Linux utility used to search for other utilities.            

Arch Linux A Linux distribution. First released March 11, 2002.  Wikipedia         

Area The area of a plane figure is the amount of surface inside the figure.

A = l × w
   Wikipedia  Khan Academy       

AREA Named section of permanent storage space that is reserved to store the database. Used in DB2.            

Area 0 Main area for an OSPF network Also called the backbone. All areas must be connected to area 0.            

Area Border Router (ABR) Has interfaces attached to multiple OSPF areas. Advertises networks learned from the type 1 LSAs to other areas as type 3 LSAs.   Wikipedia         

argument Type of token that a command that a command acts on.            

Arithmetic Logic Unit (ALU) Part of a CPU that performs logic and arithmetic.   Wikipedia         

ARM Type of preprocessor that is commonly used in mobile devices.   Wikipedia         

arp -a DOS command used to list current ARP cache.            

arp -d DOS command used to refresh the ARP cache.            

ARP cache Collection of ARP entries, which map IP addresses to MAC addresses. Created when a hostname is resolved to an IP address and then an IP address is resolved to a MAC address. Either static or dynamic, but mostly dynamic.   Wikipedia  Petri       

ARP poisoning Introducing false entries into a host’s APR cache. Allows an attacker to hide behind a fake IP address.    Wikipedia         

arpa Top level domain             

array (data structure) A list. Collection a values and variables   Wikipedia  TechNet (PowerShell - Accessing Values in an Array)       

array_rand PHP function that randomly picks from an array.   PHP Manual  W3Schools       

Arthur Scherbius Inventor of the Enigma machine. October 30, 1878 - May 13, 1929.  Wikipedia         

Artificial intelligence (AI) Machines that operate with human-like intelligence.   Wikipedia         

Ashes of the Singularity Real-time strategy game. Released March 31, 2016.  Website  Wikipedia  Steam     

Ashes of the Singularity: Escalation Expansion to the original game; Ashes of the Singularity. Released November 10, 2016. Merged into the base game February 16, 2017.  Website  Wikipedia  Steam     

Asia Pacific Network Information Centre (APNIC)    Wikipedia  Website       

ASLEAP Exploit to Lightweight Extensible Authentication Protocol (LEAP). Released by Joshua Wright in early 2004.  Wikipedia         

ASP.NET    Website  Wikipedia       

aspect ratio    Wikipedia  Wikipedia       

Aspect-Oriented Programming (AOP)    Wikipedia         

ASRock    Wikipedia  Website       

Assembly A low-level programming language.   Wikipedia         

assoc Command that displays or modifies file extension associations.   Wikipedia  Microsoft Support       

associative array (assoc) Data type.   Wikipedia         

assumption Cell reference in an Excel formula.            

asterisk * A route in a routing table that is a candidate for a default route.    Wikipedia         

asterisk * Regular expression used to match zero or more characters.   Wikipedia         

ASUS Computer hardware manufacturer.   Website  Wikipedia       

ASUS PRIME B350-PLUS (AM4 AMD B350 SATA 6Gb/s USB 3.1 USB 3.0 HDMI ATX) Motherboard form ASUS. Released March 7, 2017.  Newegg         

ASUS Prime X370-Pro (AM4 AMD X370 SATA 6Gb/s USB 3.1 USB 3.0 HDMI ATX) Motherboard from ASUS.  Released March 7, 2017.  Newegg         

ASUS ROG Crosshair VI Hero (AM4 AMD X370 SATA 6Gb/s USB 3.1 USB 3.0 ATX) Motherboard from ASUS. Released March 9, 2017.  Newegg         

ASUS XG-U2008 Unmanaged network switch from ASUS. Features two 10GBASE-T ports and eight 100/1000 Mbps Ethernet ports.   Website         

ASUS Zenbook UX21E Twelve-inch ultrabook from ASUS. First released October 12, 2011.  Website  Wikipedia       

ASUS ZenBook UX303UB Laptop from ASUS.   Website  Support  Wikipedia     

ASUS Zenbook UX31E Thirteen-inch ultrabook from ASUS. First released October 12, 2011.  Website  Wikipedia       

asymmetric cryptography (aka: public-key cryptography) Cryptographic system uses two separate keys; public and private. Public keys only encrypt and private keys only decrypt. Handles authentication and encryption. Mostly used for transmitting session keys. Typically slower than symmetric algorithms. 512-4096 bits. (RSA, ElGamal, elliptic curves, and DH)   Wikipedia         

Asymmetric Digital Subscriber Line (ADSL) Faster download speed than upload speed.   Wikipedia         

Asynchronous Not requiring a clock rate.   Wikipedia         

Asynchronous Balanced Mode (ABM)    Wikipedia         

Asynchronous DRAM (ADRAM) (legacy) First type of DRAM in use. Originated in the 1960s and in commonly in use until about 1997. Replaced by SDRAM.  Wikipedia         

Asynchronous JavaScript and XML (AJAX)    Wikipedia  W3Schools       

Asynchronous Transfer Mode (ATM) A packet-switched WAN. Works on public and private networks. Small cells of fixed length are good for voice and video traffic because it maintains good signal.   Wikipedia         

at Command that schedules other commands and programs to run on a computer.   Wikipedia  Wikipedia       

AT system connector Original power connector for early AT PC motherboards.   Wikipedia         

AT&T Telecommunications company.   Wikipedia         

AT&T Outage Information    Website         

Atanasoff-Berry computer (ABC) First automatic electronic digital computer. Designed 1937 to solve systems of linear equations.  Wikipedia         

Atari  Founded by Nolan Bushnell and Ted Dabney June 27, 1972.  Wikipedia         

ATI Radeon HD 3870  Released November 9, 2007.  Wikipedia         

ATM cells Always have a fixed length of 53 bytes. (5 byte header, 48 byte payload.)    Wikipedia         

Atom Text editor for OS X, Linux and Windows developed by GitHub.   Wikipedia  Website       

attachment File sent in an email. Gmail allows attachments up to 25MB in size.   Gmail Support         

Attachment Unit Interface (AUI) Physical and logical interface defined in the original IEEE 802.3 standard for 10BASE5 Ethernet. Phased out in the early 1990s in favor of 10BASE-T.  Wikipedia         

ATTRIB DOS command that displays or changes file attributes.   Wikipedia         

attributes Data that describes an object.   Wikipedia         

au (.au) Top level domain for Australia.            

AuditPol.exe    Website  Wikipedia       

authentication Confirms the truth of an identification through credential validation. Passwords and PINs are simple forms of authentication. Ensures message is form who it claims to be from and that it was not forged.   Wikipedia         

Authentication Header (AH) (IP protocol 51) Member of the IPsec protocol suite. Provides connectionless data integrity, data authentication, and anti-Replay detection, but not data encryption. Supports HMAC-MD5 and HMAC-SHA-1. Can have problems with NAT.   Wikipedia         

Authentication Mechanism Assurance (AMA) Controls access to network resources based on the type of certificate used during logon. Introduced in Windows Server 2008 R2.  TechNet         

Authentication Server (AS) (TACACS+ or RADIUS)   Wikipedia         

Authentication Service (AS) Part of Kerberos that provides the Ticket Granting Ticket (TGT).            

Authentication, Authorization and Accounting (AAA) Family of protocols which mediate network access. Two AAA protocols include RADIUS and TACACS+. Both RADIUS and TACACS+ provide auditing of log files.   Wikipedia         

Authentication, Authorization, and Accounting with Secure Transport (AAAA)    Wikipedia         

authoritative name server Name server that gives answers in response to questions asked about names in a zone.   Wikipedia         

Authorization Specifies access rights. Elements include separation of duties, rights, permissions and privileges, and the principle of least privilege.   Wikipedia         

AutoIncrement             

Automatic Certificate Management Environment (ACME) Protocol for automating interactions between certificate authorities and their users' web servers, allowing the automated deployment of public key infrastructure at very low cost.   Wikipedia         

Automatic Data Processing (ADP)    Website         

Automatic Private IP Addressing (APIPA) (aka: auto-IP) Microsoft's name for an IPv4 link-local address. Addresses are assigned in the class B 169.254.0.0 to 169.254.255.255 range. Typically the result of a DHCP error.   TechNet  Wikipedia       

automatic summarization Converts addresses into classful.   Wikipedia         

Autonomous System (AS) Collection of routers under a common administration such as a company or organization.   Wikipedia         

Autonomous System Boundary Router (ASBR) A router located between an OSPF routing domain and a non-OSPF network.   Wikipedia         

AutoNumber    Wikipedia         

Autotransformer Have only one winding used as both the primary and secondary. At a disadvantage by not having line isolation between the windings.            

AUX port Similar to a console port but configuration occurs through a dial-up connection.   Wikipedia