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Jumat, 08 Juni 2012

Apa ini..apa itu...istilah2 di IT!

3DES - Triple Data Encryption Standard: A method of encryption (168 bit). Authentication, Authorisation, and Accounting: Security system.
AAA - Authentication proves who you are, Authorisation says what you can do, and Accounting logs what you have done.
ACE - 1. Access Control entry: One element of an ACL
           2. RSA ACE Server is the old name for RSA Authentication Manager.
ACL - Access Control List:Rules applied on a network device that allow communication over numbered ports to and from certain IP addresses.
AD - Active Directory: Introduces with Windows Server 2000, this is Microsoft's domain directory services role.
ADAM - Active Directory Application Mode: This was replaced in Server 2008 with LDS  
ADMX - A file extension used for files that can be imported into Microsoft Group Policy Objects.
ADSL - Asymmetric Digital Subscriber Line: An internet connection ran over copper wire (usually a telephone line). It tends to have faster download than upload speed.
AES - Advanced Encryption Standard 128,192, or 256bit.
AH - Authentication Header: A member of the IPSec suite of protocols provides integrity and authentication of data packets.
AMD - Advanced Micro Devices: A company that makes microprocessors and CPU's. Main rival to Intel.
API - Application Programming Interface: Allows software to talk to other software.
ASA - Adaptive Security appliance: Range of Cisco firewalls. ASDM Adaptive Security Device Manager: Web management console for Cisco firewalls running OS 7 and above.
ATA - Advanced Technology Attachment: Used to connect drives to a computer.
AV - Anti Virus.
AVI - Audio Video Interleave: A File format used for video files.
BBWC - Battery Backed Write Cache: A small power source that lived on a hardware RAID controller, the battery supplies power to the cache so in the event of power loss, information that is about to written to disk is not lost.
BIOS - Basic Input Output system: This is bootable firmware that live on most modern PC's and Servers you access this before the OS loads usually by pressing F1, F2, F10, or Esc.
BITS - Background Intelligent Transfer Service: A system that uses idle bandwidth to download data (usually updates).
BSOD - Blue Screen Of Death: Seen on a Windows Machine after a crash, if it has not been set to reboot in the event of a crash, it takes it name from the blue background and white text. (Also see PSOD).
CA - Certification Authority: An entity that produces digital certificates.
CAL - Client Access Licence: A Licence used to access server services, used a lot on Microsoft Networks where licenses are "per seat", "per user", or "per device".
CAS - Client Access Server: A role used by Microsoft Exchange server. A CAS server typically runs OWA and ActiveSync
CCO - Cisco Connection Online: You can create a login free at Cisco to log into this service, once set up you can add valid support agreements to you account to enable you to get support and download updates. 

CCP - Cisco Configuration Professional: A Java based graphical management software tool for deploying and configuring Cisco Routers, and wireless access points etc.
CCR - Cluster Continuous Replication: Introduced in Exchange 2007, this provides a second copy of the exchange database that can be used in a disaster recovery situation.
CD - Compact Disk
CHAP - Challenge Handshake Authentication Protocol: Used to authenticate a remote user or hot.
CIFS - Common Internet File system: A Microsoft system for sharing files on a network that was developed from SMB.
CLI - Command Line Interface: The command interface for various network devices, usually accessed by a console cable SSH or Telnet.
CMOS - Complementary Metal Oxide Semiconductor: this is actually a technology used in integrated circuits, but some people still refer to a machines BIOS/RBSU as CMOS  
 CN - 1. Common Name: {digital certificates} When a digital certificate is signed by a CA, this proves the
               common name (the name presented on the certificate) is correct.
            2. Common Name: {Active Directory AD} The name of an object in active directory i.e. "CN=Fred
                Bloggs".
CODEC - COder-DECoder (or COmpressor-DECompressor). A small piece of software that lets a computer "Understand" a particular video/audio encoding.
CPU - Central Processing Unit: The "Brain" and main chip that provides a machines number crunching capability.
CRM - Customer Relationship Management: A system used primarily by sales marketing, and customer services. It's usually a database of customers and potential customers.
CSC - Content and Security Control: A Plug in module for ASA 5510 and above platforms that provides scanning and anti spam facilities from an embedded Trend Micro Server.
CSE - Client Side Extensions: A set of extra GPP settings built into Windows 7, (need to be manually installed on older versions of Windows)
CSV - Comma Separated Values: A common file format that can be opened by Microsoft Excel. Also used for importing and exporting bulk data.
CSVDE - Comma Separated Value Data Export: A method of bulk importing or exporting data from a CSV file to perform a task - commonly used for bulk import/export of users or computers with AD DC Domain Controller: The logon server that's present in Microsoft Server domains. DES Data Encryption Standard: A method of encryption (56 bit) is considered very weak for modern communication - in 1999 it was broken in 22 hours and 15 minutes by the EFF DH Diffie Hellman: A system used to swap keys securely over a public network. DHCP Dynamic Host Configuration Protocol: A method used to lease an IP address to a device so it can communicate on a network.
DMZ - De-Militarised Zone: A network segment attached usually to a less secure network, traditionally the home of web servers and edge servers.
DNS - Domain Name system: The system that translates network names into IP addresses. DS Directory Services: Using a central repository of network assets for management
DSL - Digital Subscriber Line: A network connection, usually to the internet, the speed of traffic "down" is usually fast, and the speed of traffic "up" is slow, this makes it ideal for home internet connections.
DSN - Data Source Name: Usually used with ODBC connections these refer to a data source (usually a database).
DVD - Digital Versatile Disk or Digital Video Disk EFF Electronic Frontier Foundation: Non profit US organisation.
EMC - Exchange Management Console: The Graphical user management console for Microsoft Exchange.
EPT - Extended Page Tables: A technology used by Intel VT-x for CPU virtualization.
ESMTP - Extended Simple Mail Transfer Protocol (SMTP) As users wanted to send extra data attached to their emails, this system was developed to let that happen. It lets a client and mail server negotiate what capabilities it can use.
ESP - Encapsulation Security Payload: A member of the IPsec suite of protocols provides authenticity integrity and confidentiality of data packets.
ESX - Originally Stood for Elastic Sky, ESX is Vmware's hypervisor virtualisation server platform developed from GSX the i in ESXi is is for "Integrated" and can be ran from a flash drive or chip on a PC/Server.
EULA - End User Licence Agreement: the legal contract between the user and the person/company who has produced some software. Typically the EULA is the section in an install where you tick "I Agree..".
FEP - Forefront Endpoint Protection: Microsoft's Client AV solution released 2010
FQDN - Fully Qualified Domain Name, usually a PC or servername followed by the domain DNS name i.e. server1.petenetlive.com FSMO Flexible Single Master Operation: pronounced "Fiz-mo" These are 5 roles held by Active Directory domain controllers.
FTP - File Transfer Protocol: As the name suggests, a protocol for transferring files over a network uses TCP Port 21.
GAL - Global Address List: Used on a Microsoft Exchange server a list of email addresses generated by the server that clients can search.
GB - Gig a Byte: Giga means 10 to the power 9, or 1,000,000,000 bytes, however in computing terms we work in binary so it worked out as 2 to the power 30, which equals 1,073,741,824 bytes. Gbps Giga bits per second 9 a bit is one binary digit (0 or 1) there are 8 bits in one Byte. GSX à From its development name GSX is Vmware's Ground Storm Virtualisation platform, was replaced by ESX GPO Group Policy Object: This is a template used to lock down or enforce a policy on a computer or a user.
GPP - Group Policy Preference: Brought in with Windows Server 2008 designed to compliment GPO network management.
GRE - Generic Routing Encapsulation: A Cisco protocol for encapsulating other protocols over a network.
GRT - Granular Recovery Technology: A term used by Symantec to describe their backup technology, that lets you restore a single item from a large backup job, e.g. one email from and Exchange backup, or one user from Active Directory.
GUI - Graphical User Interface. GUID Global Unique Identifier: Used to identify active directory objects, and also a hard coded serial number built into computers so they can be identified on a network when they pXe boot.
HA - High Availability: An attribute given to a VMware cluster so that if any ESX host fails, it's guest machines automatically get migrated to another host. Also the term used to describe multiple exchange databases deployed for failover.
HDD - Hard Disk Drive.
HTML - Hyper Text Markup Language: Is a language used to create documents on the world wide web.
HTPC - Home Theatre Personal Computer.
HTTP - Hyper Text Transfer Protocol: Traditionally the protocol of web pages, runs over TCP port 80, however multiple vendors abuse this by trying to get their software to run on the same port as this port is usually open on corporate firewalls.
HTTPS - Hyper Text Transfer Protocol Secure: This is web traffic that is secured, using SSL IAS à Internet Authentication Server: Microsoft Implementation of RADIUS
ICMP - Internet Control Message Protocol: Part of the IP suite of protocols, ICMP is used to send errors and connection states.
IE - Internet Explorer: Microsoft's web browser.
IETF - Internet Engineering Task Force: Develops and promotes Internet Standards
IIS - Internet Information Server: The Microsoft web server platform, included with Windows server systems.
IKE - Internet Key Exchange: A protocol used to set up SA's in the IPsec protocol iLO Integrated Lights Out: Let you connect to the console of a HP Proliant Server, even if its powered off, the iLO is presented as a standard RJ45 network socket on the back of the server. IMAP à Instant Message Access Protocol: Method of retrieving messages from a mail server, runt over TCP port 143
IOS - Internetwork Operating System: OS used by Cisco devices and Apple Devices. 
IP - Internet Protocol A protocol for communicating across a switched network (like the Internet). IPSEC à Internet Protocol Security: A suite of protocols for securing IP communications.
IPv6 - IP Version 6: Replacing IPv4 (current version which can have  2 to the power 32 (4,294,967,296) possible addresses, IPv6 uses 128-bit addresses, for an address space of 2 to the power 128 (approximately 340 undecillion or 3.4×10 to the power 38).
ISA - Microsoft Internet Security and Acceleration Server: replaced MS Proxy 2.0, it provides web proxy services and Enterprise Firewall capabilities.
ISAKMP - Internet Security Association and Key Management Protocol: A system for establishing Security Association and secure keys, usually used for VPN communication.
iSCSI - Internet Small Computer System Interface: System used to carry SCSI commands over an IP network, used for small SAN infrastructures.
ISO - A type of file format that's used for storing CD/DVD Images, it takes its name from the International Organization for Standardization.
ISP - Internet Service Provider: The Person or company that provides a link to an external network (usually the Internet).
ISR - Integrated Services Router: A series of Cisco Routers.
JNLP - Java Network Launching Protocol: Used to deliver "Java Web Start" and run an application from a web server.
KB - Kilo means 10 to the power 3, or 1,000 bytes, however in computing terms we work in binary so it worked out as 2 to the power 10, which equals 1,024 bytes.
KMS - Key Management Server/Service: With the release of Windows Vista/2008 Microsoft changed their software licence method. Previous VLK keys were replaced by both MAK and KMS Keys. Software with a KMS key must get its activation from a KMS server (installed on its local network) every 180 days.
L2TP - Layer Two Tunnelling Protocol: Developed from PPTP used to authenticate remote VPN clients
LAN - Local Area Network: A computer network that connects multiple PC's to each other and local resources. Also the inside port on a router or firewall.
LDAP - Lightweight Directory Access Protocol: Designed for accessing and editing directories over an IP network, Microsoft LDAP commonly runs over TCP port 389 LDS Lightweight directory Services: A small subset of AD that's used for applications, (on versions of Windows before 2008 it was called ADAM) LTO Linear Tape Open: A standard of magnetic tape storage, developed by Quantum/Seagate. Commonly used by HP, IBM and Certance
LUN - Logical Unit Number: used in SAN storage, each piece of "storage" is represented by a LUN that's presented to other devices on the storage network/fabric.
MAC - Media Access Control: The "Burned in" hardware address used on all Ethernet network devices.
MAK - Multiple Activation Key: A Microsoft software unlock code, designed to be used multiple times. Took over from a VLK key, its either entered manually, from a script or unattended file, or using the VAMT tool.
MAPI - Messaging Application Programming Interface: A Set of standards and instructions that allow programs to talk to Microsoft Mail applications like Exchange Server.
MB - Megabyte: Mega means 10 to the power 6, or 1,000,000 bytes, however in computing terms we work in binary so it worked out as 2 to the power 20, which equals 1,048,576 bytes. MD5 à Message digest algorithm 5: Produces a fixed 128 bit hash commonly used to check integrity of files
MKV - Matroska Files: these are video files, similar to AVI files, but with extra features. MMC à Microsoft Management Console: A front end that accepts various "Snap ins" for managing items in a windows environment.
MPF - Modular Policy Framework: A system for applying policies on a Cisco Firewall they can be applied globally or per interface.
MSA - Modular Storage Array: A range of SAN devices by Hewlett Packard
MSCHAP - The Microsoft Implementation of CHAP
MSDN - Microsoft Developer Network (here). MSI Microsoft Installer File: A type of file extension that denotes a piece of setup software for an application, the advantage of .msi files is that they can be installed on clients via GPO NAS Network Attached Storage: Hard drive storage that's presented to a network with its own address.
NAT - Network Address Translation: Translating many IP addresses to few IP addresses.
NDR - Non Delivery Report: Produced by a mail server, and sent to the sender, when an email cannot be delivered.
NetBIOS - Network Basic Input/Output System: Is NOT a networking protocol its an API, can be likened to DNS insofar at it maps names to IP addresses.
NFS - Network File system: Developed by Sun Microsytems this is a protocol for allowing a client to access files on a shared datastore/system, currently at version 4 and is defined in RFC 3530.
NIC - Network Interface Card: The device that connects a PC/Server to a network this can be wired or wireless.
NNTP - Network News Transfer Protocol: An old protocol used for posting usenet articles runs on TCP port 119
NSEL - NetFlow Secure Event Logging
NTFS - New Technology File system: Introduced with Windows NT4, a method of securing files on storage media.
NT - New Technology: Released as Windows NT 3.1 (1993). The most well known is Windows NT4 (1996). Its still a system in use today (Windows 7 and Server 2008 R2 is denoted as NT 6.1). NTLM NT LAN Manager: A Microsoft suite of protocols that provide authentication, integrity and confidentiality.
NTP - Network Time Protocol: Used to synchronise system clocks on network devices. It runs over UDP port 123.
NVRAM - Non-Volatile RAM: A term usually used with routers to describe RAM that contains information that will not be lost when the device is powered off, these days we would call it flash memory. But you will still see this term used in router documentation.
OAB - Offline Address Book: Generated by Microsoft Exchange Server and downloaded to Microsoft Outlook clients for use in cached mode.
ODBC - Open Database Connectivity: A standard method of accessing a database. Usually configured on a client that has software that needs a database 'back-end' on another server or machine,
OEM - Original Equipment Manufacturer: Someone who produces computer equipment that comes pre-bundled with a Windows operating system. Note: A Windows OEM code will NOT work on Volume Licensed Software OS Operating System: The software between the hardware and you, on a PC it would be Windows or Linux, on a Hardware device it is probably vendor specific i.e. Cisco ASA OS 7.2(2)
OTP - One Time Password: Used in cryptography to obtain a certificate.
OU - Organisational Unit: This is a container used in Directories like Active Directory or Novell Directory Services, can be used to hold directory objects like users, servers or printers etc. They can also be used to apply GPO
OVF - Open Virtualization Format: A method of "Transporting" virtual machines, used so that they can be made "Portable".
OWA - Outlook Web Access: The web front end to Microsoft Exchange. After Exchange 2010 this is now called Outlook Web App.
P2V - Physical to Virtual: The act of converting a real machine top a virtual one.
PAK - Product Activation Key: a Licence key used by Cisco, to enable/add features to a Cisco device.
PAT - Port Address Translation: Translating many IP addresses to a single IP address (Used on Cisco firewalls for port forwarding).
PCoIP - Created by a firm called Tradici, it is a similar protocol to RDP, insofar as it lets you view the desktop of a remote machine and interact with it. It's the preferred protocol to use with VMware View (after version 4.6).
PDC - Primary Domain Controller: Used in Windows NT4 environments, though now in new Active Directory you will still have a domain controller that holds the PDC Emulator FSMO role. PDF Portable Document Format: Usually opened with Adobe Acrobat (Though other pdf readers exist).
PDM - PIX Device Manager: Web management console for Cisco firewalls running OS 6 and below.
PID - Process Identifier: The number allocated to processes on a computer running an OS like windows or UNIX.
PING - Ping is a command utility that uses the "echo request" part of the ICMP suite of communications protocols, it is used to test network connectivity and the "round trip" time packets take over a network.
PIX - Packet Internet eXchange: Cisco's firewall platform before the ASA was released.
PFS - Perfect Forward Secrecy is a method by which new keys are generated, each new key is mathematically linked to the key that came before it, the prior key being a "Grandfather" key. With PFS enabled this link is broken so a key can not be forward/reverse engineered to guess a previous/new key value). Every new negotiation produces a new fresh key.
POP - Post Office Protocol: Method for retrieving mail from a public mail server runs over TCP port 110 POTS Plain Old Telephone System.
PPP - Point to Point Protocol: This is a communication protocol that is designed to establish a link between two places, it provides authentication, encryption and compression.
PPPoE - Point to Point Protocol over Ethernet: This is a communication protocol that uses PPP and places that information into normal ether net frames, its commonly used with DSL connections.
PPTP - Point to Point Tunnelling Protocol: Used to establish a VPN tunnel it runs in IP protocol 47 and TCP port 1723.
PSOD - Pink Screen Of Death: Seen on VMware servers after a crash (like a Windows BSOD only the screen background is pink).
PSTN - Public Switched Telephone Network: Old fashioned phone system sometimes referred to as POTS
PXE - Pre eXecute Environment: A system in modern PC's that enable them to be booted from their NIC.
R2 - Release 2 (or Second Release), used by Microsoft for major OS releases e.g. Windows Server 2003 R2 and Windows Server 2008 R2
RAID - Redundant Array of Independent Disks (or Inexpensive Disks depending on who you are talking to). This is a blanket term, for any method of presenting multiple physical disks, and making them appear as a single piece of storage.
RADIUS - Remote access Dial In User System: A method of authenticating access to a network.
RAM - Random Access Memory: Or volatile memory, provides a PC/server with short term high speed memory.
RBAC - Role Based Access Control: Used with Exchange 2010, makes delegating Exchange tasks easier.
RBSU - ROM Based Setup Utility: Typically found on HP Servers the RBSU is a small BIOS chip for holding the system settings.
RDP - Remote Desktop Protocol: A Microsoft protocol that allows the desktop of one machine, to be shown on another machine over a network, can be used for remote assistance, remote administration, or Terminal Services. Runs over TCP port 3389 RDS Remote Desktop Services the new name in Windows 2008 for Terminal Services (TS).
RDX - Removable Disk Storage/Backup System (No I don't know why it has an X!) a Hard Drive based backup solution that behaves like a tape drive.
RFC - Request For Comments: These are a collection of memorandums published by the IETF as a method of trying to standardise communication standards and protocols.
RIS - Remote Installation Services: Introduced in Windows 2000, system for deploying (imaging) PC's and Servers from a central Windows Server (Replaced by WDS).
RODC - Read Only Domain Controller (Server 2008 only). A domain controller with a "Read Only" database it caches credentials rather than storing then in case it is stolen.
ROM - Read Only Memory: Memory that can not (normally) be written to i.e. CD ROM. ROMMON à ROM Monitor, is a low level bootstrap program used on Cisco devices to check and initialise the hardware then load the operating system.
RPC - Remote Procedure Call: A system used on random communication ports to let systems talk to each other.
RSA - Rivest, Shamir and Adleman: An algorithm for public key cryptography.
RSAT - Remote Server Administration Tools: Suite of Microsoft MMC consoles for managing servers and domains.
RTFM - Read the F***ing Manual!
RTFQ - Read the F***ing Question!
RTM - Released To Manufacturing
SA - Security Association: a secured peer in a site to site VPN
SAN - Storage area Network: A Network of storage/disks that is presented as central storage to many devices.
SAS - Serial attached SCSI used for connecting computer peripherals, currently runs at about 3 Gbps but can run up to 10 Gbps.
SATA - Serial ATA: A Standard for connection drives, (Hard Drives and optical drives) its a seven pin socket that connects them to the computers motherboard.
SBS - Small Business Server: A Microsoft Server platform that includes Exchange (and with some flavours ISA and SQL Server) as the name suggests, for small corporate deployments with less than 75 users/devices
SCCM - System Center Configuration Manager: Formally (SMS) Systems Management Server this is a tool for managing large numbers of Windows Machines.
SCSI - Small Computer System Interface: A set of commands for transferring data between hardware devices, traditionally 8 or 16 devices can be attached to a SCSI bus.
SD - Secure Digital: A memory card format developed by Panasonic .Basically a small flash memory card also comes as miniSD and microSD. In addition you can also get SDHC and SDXC.
SDHC - SD High Capacity - up to 32 GB capacity.
SDM - Security Device Manager: A web based management tool for Cisco Routers.
SDXC - SD Extended Capacity - up to 2 TB capacity.
SHA - Secure Hashing algorithm: Produces a fixed 160 bit hash commonly used to check integrity of files
SID - Security Identifier: A string of letters and numbers assigned to a windows client as it joins a domain. with older machines there was much panic about needing to strip the SID for cloned or imaged machines. These days its less of a problem (click here.)
SIM - System Image Manager: Is part of the WAIK and used to produce unattended XML answer files for Windows deployment
SIP - Session Initiation Protocol: Used for video, voice, and chat networking.
SMB -   1. Small to Medium sized Business: Also a Cisco Partner Level.
              2. Server Message Block: An old Microsoft file sharing protocol, now renamed CIFS
                  SMS Systems Management Server: this is a tool for managing large numbers of             
                  Windows Machines, it's now been replaced with SCCM.
SMTP - Simple Mail Transfer Protocol: Common protocol used for email runs on TCP port 25 SNMP à Simple Network Management Protocol A widely used network monitoring and control protocol. Uses UDP ports 162 and 161.
SOHO - Small Office / Home Office SPx Service Pack x: Usually written as SP1 for Service Pack 1, SP2 for Service Pack 2 etc.
SPI - Security Parameter Index: Label used by IPsec for the end of a VPN tunnel in phase 2 of IKE 2 unidirectional tunnels are created each will have its own SPI number.
SQL - Structured Query Language: Typically a Database system/server, most well known is Microsoft SQL server, or the free MySQL alternative.
SRV - Service Locator: A type of DNS record that lets clients on a network, know where services are, and how to access them.
SSH - Secure Sockets Handshake: A secure method of console access, think of it as secure telnet.
SSL - Secure Socket Layer: A cryptographic system that used public and private keys to transmit data over a network securely.
SLA - Service Level Agreement: An agreement between an IT support organisation and a user of its/their services.
OR - a command used in Cisco IOS to set up a monitor.
TAC - Technical Assistance Center: Cisco's third line support, be sure to have a valid support agreement before you ring.
TAR - Tape ARchive: A file extension for compressed files common formats are .tgz .gzip, or .bzip2 TB Terabyte: Tera means 10 to the power 12, or 1,000,000,000,000 bytes, however in computing terms we work in binary so it worked out as 2 to the power 40, which equals 1,099,511,627,776 bytes.
TCP - Transmission Control Protocol: Connection oriented protocol for data transfer, uses a "3 way handshake" to make sure the traffic gets where its supposed to go.
TELNET  - Terminal NETwork: A TCP protocol that allows remote users to enter commands on a device runs over TCP port 23 TFTP Trivial File Transfer Protocol: A Little like FTP, but uses UDP Port 69, commonly used for updating firmware on network devices.
TLS - Transport Layer Security:Similar to SSL provides encrypted data transfer TS Terminal Services: Microsoft's "Thin Client" solution for sharing applications. Now called Remote Desktop Services on Server 2008.
UAC - User Account Control: Introduced with Windows Vista, a system designed to stop you running normally with an administrative account
UDP - User Datagram Protocol: This is a a transport protocol which operates at the same layer as TCP but unlike TCP it is not connection based, it's a "Fire and forget" protocol if it does not get to the other end its not important.
UNC - Universal Naming Convention: Used to map network drives and resources e.g. \\server_name\share_name\file_name UPS Uninterruptible Power Supply: A device that provides battery backup power when the electrical power fails or drops to an unacceptable level.
URL - Uniform Resource Locator: a Web address like www.petenetlive.com
USB - Universal Serial Bus: A Method of connecting computer peripherals (up to a maximum of 127 devices). USB 1.0 is 1.5Mbps, USB 1.1 is 12Mbps, USB 2 is 480 Mbps and USB 3.0 is 4800 Mbps.
UTC - Universal Time Coordinated (Commonly Coordinated Universal Time) is the time taken from Greenwich this can also be called "Zulu Time".
VAMT - Volume Activation Management Tool: A Microsoft tool for managing MAK software licence keys. This can also change KMS keys to MAK keys.
VB - Visual Basic: A Microsoft programming language. Also used with VBScripting, which uses files with a .vbs extension to run scripts
VC - Virtual Center: A Server that manages your VMware ESX hosts VI3 Vmware virtual infrastructure version 3 VI Virtual Infrastructure.
VIB - VMware installation bundle: software and driver packages needed for installing ESX5 VIM à Virtual Infrastructure Manager: or VMware vCenter
VLAN - Virtual LAN: A group of network devices that appear to be on a separate network segment, also called a broadcast domain.
VLK - Volume Licence Key: Windows XP/Windows Server 2003 (And earlier) used these keys for multiple activations, they have been replaced with MAK and KMS Keys
VLSC - The Microsoft Volume Licence Service Center, formally called eOpen (here)
VM - Virtual Machine: A group of files that when read by some software like VMware, VirtualPC, Hyper-V, or XenServer looks and behaves like a real physical machine.
VMDK - Virtual Machine Disk: VMware format for storing hard drives for virtual machines. VMFS à Vmware file system: Used so that multiple hosts can access the same storage at the same time, it uses a system of "Locks" on each file so only one host access the data at any one time. Vmotion A Vmware system for moving a running virtual machine from one ESX host to another ESX host. You can also use "Storage Vmotion" to move a running virtual machine's files and hard disks to another piece of storage.
VPN - Virtual Private Network: A secure link that carries sensitive data over a public network, the data is protected by encryption.
vSphere - VMware's cloud operating system formally called VI3
VSS - Windows Volume Shadow Services: System used by Microsoft for backing up data.
VT-x Intels processor à Visualization technology, Originally code named "Vanderpool" it needs to be enabled on some machines in their BIOS/RBSU/CMOS
WAIK - Windows Automated Installation Kit: A suite of tools from Microsoft for imaging and deploying Windows systems.
WAN - Wide Area Network: A network that connects geographically distributed LANs. Also the external port on a router or firewall.
WCF - Windows Communication Framework: This is a Windows Server 2008 feature that runs under .net
WDS - Windows Deployment Services: A system for deploying (imaging) PC's and Servers from a central Windows Server (Replacement for RIS).
Wi-Fi - Wireless Fidelity: A term used to describe various net worked devices on a WLAN connected wirelessly.
WindowsPE - Windows Pre-Execution Environment: A cut down version of Windows that can be run from USB drive, CD, or deployed from WDS.
WINS - Windows Internet Naming Service: A legacy Microsoft method of resolving computer NETBIOS names on a network.
WLAN - Wireless Local Area Network (See LAN)
WSUS - Windows Server Update Services: Free update and patch management system for Windows servers and applications.
WWW - World Wide Web: A collection of text and graphics displayed in a web browser, what most people would call the internet. www is also the Cisco reference to TCP Port 80 (http)
XML - eXtensible Markup Language:A structured way of presenting information, that uses tags much like HTML
ZAK - Zero Administration Kit: Introduced with Windows NT4 (sill available here).
ZIP A - term used to describe the process of compressing many files/folders and putting then in a compressed "Archive" folder. ".zip" is a file extension for an archive though there are more archive types, e.g. .RAR, .CAB, and .TAR are common examples.

Salam....
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