An application of the Extensible Markup Language (XML) that enables different computer network directory formats to be expressed in a common format and shared by different directory systems.

A form of HTTP exploit in which a hacker uses the software on a Web server to access data in a directory other than the server's root directory. If the attempt is successful, the hacker can view restricted files or execute commands on the server. 

An industry-standard initiative and specification for how to construct and store information about a network's users, applications, and data in a central directory.

DirectX is a set of low-level Application Programming Interfaces (APIs) that provides Windows programs with high-performance hardware-accelerated multimedia support. It provides access to the capabilities of your display and audio cards, which enables programs to provide realistic three-dimensional (3-D) graphics and immersive music and audio effects. DirectX enables the program to easily determine the hardware capabilities of your computer, and then sets the program parameters to match.

A database record that contains errors. Dirty data can be caused by a number of factors including duplicate records, incomplete or outdated data, and the improper parsing of record fields from disparate systems.

A Novell's directory interchange software that uses XML to keep different directories synchronized. With DirXML, an IT manager can administer multiple user databases from a single interface, using NDS eDirectory to replicate the information. 

A message sent using a type of distribution management tool for e-mail. A user of the software can set various policies on messages that control a recipient's access to them after they are sent.

Disaster recovery (DR) the policies, process and procedures that are related to preparing for recovery or continuation of technology infrastructure which are vital to an organization after a natural or human-induced disaster.

The examination of each step in a disaster recovery program. DR testing helps in recovering data, restore business critical applications, and continue operations after an interruption of services. 

A method of momentarily powering-down, or muting, a mobile or portable wireless telephone set when there is no voice input to the set. This optimizes the overall efficiency of a wireless voice communications system.

A mechanism for improving the time it takes to read from or write to a hard disk. A disk cache can also be a specified portion of the RAM. It holds data that has recently been read,  and adjacent data areas that are likely to be accessed next. 

Disk Cleanup is a computer maintenance utility included in Microsoft Windows designed to free up disk space on a computer's hard drive. The utility first searches and analyzes the hard drive for files that are no longer of any use, and then removes the unnecessary files.

The act of copying the contents of a computer's hard drive. The contents are typically saved as a disk image file and transferred to a storage medium, which could be another computer's hard drive or removable media such as a DVD or a USB drive.

A variation of disk mirroring in which each of multiple storage disks has its own SCSI controller. It uses redundant controllers that enables continued data access as long as one of the controllers continues to function.

A copy of the entire contents of a storage device, such as a hard drive, DVD, or CD. The disk image represents the content exactly as it is on the original storage device, including both data and structure information. 

Disk Management is a system utility for managing hard disks and the volumes or partitions that they contain. With Disk Management, you can initialize disks, create volumes, and format volumes with the FAT, FAT32, or NTFS file systems. Disk Management enables you to perform most disk-related tasks without restarting the system or interrupting users. Most configuration changes take effect immediately.