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The Greening of IT
298 How Companies Can Make a Difference for the Environment

SAN (Storage Area Network)
A high-speed subnetwork of shared storage devices.
server
A computer system that has been designated for running a specific
server application or applications.
SNMP (Simple Network Management Protocol)
An Internet standard network monitoring protocol used in network
management systems to monitor network-attached devices.
SPEC (Standard Performance Evaluation Corporation)
A nonprofit corporation formed to establish, maintain, and endorse a
standardized set of benchmarks that can be applied to the newest gener-
ation of high-performance computers.
server cluster
A group of linked servers, working together closely so that in many
respects, it forms a single server (computer). Clusters are usually
deployed to improve performance and availability over that provided by
a single server, while typically being much more cost-effective than sin- ptg
gle servers of comparable speed or availability.

sustainability
The U.S. EPA defines sustainability as “meeting the needs of the present
without compromising the ability of future generations to meet their
own needs.”
TCP/IP (Transmission Control Protocol/Internet Protocol)
The set of applications and transport protocols that uses IP (Internet
Protocol) to transmit data over a network. TCP/IP was developed by the
Department of Defense to provide telecommunications for internetworking.
ton (air conditioning)
One ton of air conditioning capacity equals 12,000 BTUs per hour.
UAT (User Acceptance Test)
An IT test environment that is usually designed to be identical or as
close as possible to the user’s production environment. This test environ-
ment is used for final verification before a system goes to production
mode.