Domain

In Active Directory, a collection of computers defined by the administrator. These computers share a common directory database, security policies, and security relationships with other domains. When multiple domains are connected by trust relationships and share a common schema, configuration, and global catalog, they constitute a domain tree. In DNS, any tree or subtree within the DNS namespace. Although the names for DNS domains often correspond to Active Directory domains, DNS domains should not be confused with Active Directory domains.

The Security and Replication Boundary, Domains act as discrete object containers within the forest, can be regrouped into trees. Domains contain objects such as users, computers, servers, domain controllers, printers, file shares, applications, etc... Domains contain rules that apply to these objects.

A sub-network of servers and computers within a LAN. Domain information is useful when restoring backup tapes, particularly of email.

A portion of a protein or DNA molecule that has a discrete function or conformation. At the protein level, can be as small as a few amino acid residues or as large as half of the entire protein.

A discrete portion of a protein with its own function. The combination of domains in a single protein determines its overall function.

In air pollution modeling, the geographical area over which a simulation is performed.

A domain is the name associated with the last half of an email address, it resides after the @ symbol. (e.g. in support@smartertools.com, smartertools.com is the domain.)

A Domino domain is a collection of Domino servers and users that share a common Domino Directory. The primary function is mail routing. Users' domains are determined by the location of their server-based mail files.

For a Domino server to communicate with a server in a different domain, you create a Domain document in the Domino Directory to define the name, location, and access to adjacent and non-adjacent Domino domains and non-Domino domains. Other domains are:

• Foreign domain: A Domino domain and an external mail system such as SMP or cc:Mail. It specifies which outbound addresses are Internet addresses and where the Notes Mail Route sends those messages.
• Global domain: A group of Domino domains, such as Sales1, Sales2, and Marketing, under a single Internet domain, such as acme.com. All outbound SMTP mail, whether it originates from the Sales1 or Marketing domains, has the return address acme.com.

A group of servers running Windows NT Server. A domain can also include other types of servers and clients. [Exchange 5.5]

In a database, the set of allowed values for a table column, for example all positive integers.

A sub-set of internet addresses. Domains are hierarchical, and lower-level domains often refer to particular web sites within a top-level domain. The most significant part of the address comes at the end - typical top-level domains are .com, .edu, .gov, .org (which sub-divide addresses into areas of use). There are also various geographic top-level domains (e.g. .ar, .ca, .fr, .ro etc.) referring to particular countries.

The relevance to search engine terminology is that web sites which have their own domain name (e.g. http://www.nativetongues.com) will often achieve better positioning than web sites which exist as a sub-directory of another organisation's domain (e.g. http://ourworld.compuserve.com/homepages/tijana/).

Scheme used for logical or location organization of the web. Many people also use the word domain to refer to a specific website.

A set of subjects, their information objects, and a common security policy.

1. The independent variable used to express a function. Note: Examples of domains are time, frequency, and space. 2. In distributed networks, all the hardware and software under the control of a specified set of one or more host processors. [From Weik '89] 3. [A] unique context ( e.g., access control parameters) in which a program is operating; in effect, the set of objects a subject has the privilege to access. [INFOSEC-99] 4 . The set of objects that a subject has the ability to access [TCSEC].

A domain is the execution context that contains a running virtual machine. The relationship between virtual machines and domains on Xen is similar to that between programs and processes in an operating system: a virtual machine is a persistent entity that resides on disk (somewhat like a program). When it is loaded for execution, it runs in a domain. Each domain has a domain ID.