Acronyms

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A

  • AD - Active Directory
  • ALUA - Asymmetric Logical Unit Access, SAN feature whereby connected hosts can determine the states of target ports and prioritise paths to use to access LUN's
  • AP - Asia Pacific
  • API - Application Programming Interface, used to allow a 3rd party access to an application via software/script
  • ASCII - American Standard Code for Information Interchange, character encoding system
  • ASLR - Address Space Layout Randomisation, security feature that randomises data layout in memory
  • ASR - Automated System Recovery, HP feature to reboot hardware in the case of the OS failing
  • ATA - AT Attachment (disks), also known IDE or EIDE

B

  • BCS - British Computer Society
  • BGP - Border Gateway Protocol, a routing protocol
  • BSOD - Blue Screen of Death, as seen on Windows servers

C

  • CIFS - Common Internet File System
  • CMDB - Configuration Management Database
  • CRAC - Computer Room Air-Conditioning

D

E

  • EIDE - Enhanced IDE (drive), approximately equivalent of ATA-2
  • EMEA - Europe, Middle-East, Asia

F

  • FATA - Fibre-Channel ATA disks, slower disks with FC interface
  • FQDN - Fully Qualified Domain Name, eg vwiki.sandfordit.com as opposed to vwiki
  • FTP - File Transfer Protocol, uses TCP 20 and 21
  • FTPS - Secure version of FTP, FTP over SSL/TLS

G

H

  • HBA - Host Bus Adapter, server interface used to connect to SAN based storage
  • HTTP - HyperText Transport Protocol, the bread and butter of the internet
  • HTTPS - Secure HTTP, HTTP over SSL or TLS. Used for secure websites, and for delivering API and SOAP services

I

  • IDE - Integrated Drive Electronics, aka ATA version 1
  • IMAP - Internet Message Access Protocol, mailbox access protocol
  • IP - Internet Protocol
  • IPMI - Intelligent Platform Management Interface, open standard for managing hardware platforms
  • iSCSI - IP Small Computer Serial Interface, SCSI over IP
  • ISEB - Information Systems Examinations Board
  • ITIL - IT Infrastructure Library

J

  • JBOD - Just a Bunch of Disks

K

L

  • LAN - Local Area Network
  • LDAP - Lightweight Directory Access Protocol
  • LDS - Lightweight Directory Services

M

  • MAN - Metropolitan Area Network, somewhere between a LAN and a WAN, for example connecting buildings within a localised area
  • MPLS - Multi Protocol Label Switch(ing)
  • MSCS - Microsoft Clustering Services

N

  • NAS - Network Attached Storage, storage that's available via a network
  • NTP - Network Time Protocol, reliable time sync protocol, uses UDP 123

O

  • OSPF - Open Shortest Path First, dynamic routing protocol
  • OVA - Open Virtualisation Appliance, single file TAR of an OVF
  • OVF - Open Virtualisation Format, industry standard virtual appliance definition, made up of various files within a folder

P

  • PATA - Parallel ATA (disks, newer name for ATA disks)
  • PID - Process ID, number assigned by the OS to a running process
  • POSIX - Portable Operating System Interface, cross OS standards for API's, etc
  • PSOD - Purple Screen of Death, as seen on ESX servers
  • PVLAN - Private VLAN, VLANs over VLANs

Q

R

  • RDP - Remote Desktop Protocol
  • RIP - Route Information Protocol, old school routing protocol
  • RSS - Really Simple Syndication, news feed protocol

S

  • SAN - Storage Area Network, architecture for connecting systems to centralised storage
  • SAS - Serial Attached SCSI (disk)
  • SATA - Serial Advanced Technology Attachment (disk)
  • SCOM - System Centre Operations Manager, Microsoft monitoring and operations product
  • SCP - SSH Copy, provided by SSH v1 (has weaknesses and is outdated, SFTP provided by SSH v2 is current))
  • SCSI - Small Computer Serial Interface
  • SFTP - SSH File Transfer Protocol, secure copy provided by SSH v2 (not to be confused with FTPS
  • SMB - Server Message Block (aka CIFS), typically used to access shared file-systems and printers
  • SMTP - Simple Mail Transfer Protocol, email message delivery protocol, uses TCP 25
  • SNMP - Simple Network Management Protocol, used to monitor and manage network based devices by either polling of the device, or by the device generating traps (alerts)
  • SNTP - Simple Network Time Protocol, lightweight version of NTP that doesn't include error checking etc
  • SOAP - Simple Object Access Protocol, used to deliver remote services, usually over HTTP or HTTPS
  • SPD - Serial Presence Detect, counter of errors experienced by a RAM memory stick, recorded on the stick
  • SQL - Structure Query Language
  • SSH - Secure Shell, used to access network devices securely over TCP 22

T

  • TAR - Tape Archive, a collection of files bundled together into a container file (historically used for backups)
  • TCP - Transmission Control Protocol, networking transport of the internet
  • TFTP - Trivial FTP, lightweight FTP using UDP 69
  • TLS - Transport Layer Security, successor to SSL

U

  • UPS - Uninterruptable Power Supply
  • UUID - Universally Unique ID

V

  • VCP - VMware Certified Professional, title for certification on VMware Virtual Infrastructure / vSphere
  • VI3 - VMware Infrastructure 3, the name given to an infrastructure running ESX3(i) host servers managed by Virtual Centre v2
  • VI4 - VMware Infrastructure 4, officially called vSphere, the name sometimes given to an infrastructure running ESX4(i) host servers managed by vCentre v4
  • VIC - (VMware) Virtual Infrastructure Client
  • VIM - Virtual Infrastructure Manager, old name for VMware vCentre
  • VLAN - Virtual LAN, allows different networks to be carried across the same Ethernet, differentiated by 802.1Q tags
  • VMDK - Virtual Machine Disk file, a VMware virtual machine's virtual hard drive file
  • VMFS - Virtual Machine File System, VMware's storage format for virtual machines to run on
  • VNC - Virtual Network Computer, superior remote desktop application
  • VPN - Virtual Private Network
  • VRF - Virtual Routing and Forwarding, used to provide selective/conditional routing
  • VSS - Volume Shadow Service, Microsoft OS service that creates quiesced disks (aka snapshots)

W

  • WAN - Wide Area Network

X

Y

Z

  • ZCA - Appliance version of a ZCS
  • ZCS - Zimbra Collaboration Suite
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