Acronyms

A

• AD - Active Directory
• AP - Asia Pacific

B

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

C

• CMDB - Configuration Management Database
• CRAC - Computer Room Air-Conditioning

D

• DCE - Data Communications Equipment, eg modem
• DTE - Data Termination Equipment, eg router

E

• EMEA - Europe, Middle-East, Asia

F

• FQDN - Fully Qualified Domain Name, eg vwiki.sandfordit.com as opposed to vwiki
• FTP - File Transfer Protocol, uses TCP 20 and 21

G

• GPO - Group Policy Object

H

• HBA - Host Bus Adapter

I

• IMAP - Internet Message Access Protocol, mailbox access protocol
• IP - Internet Protocol
• 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

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

P

• PSOD - Purple Screen of Death, as seen on ESX servers
• PVLAN - Private VLAN, VLANs over VLANs

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
• SCOM - System Centre Operations Manager, Microsoft monitoring and operations product
• SCSI - Small Computer Serial Interface
• SMTP - Simple Mail Transfer Protocol, email message delivery protocol, uses TCP 25
• SNMP - Simple Network Management Protocol, polls use UDP 161, traps use UDP/TCP 162
• SQL - Structure Query Language
• SSH - Secure Shell, used to access network devices securely over TCP 22

T

• TCP - Transmission Control Protocol
• TFTP - Trivial FTP, lightweight FTP using UDP 69

U

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

V

• 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