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- DOCUMENT:Q101957 27-JUL-1993 [W_NTAS]
- TITLE :Domains, Domain Controllers, and Workstations
- PRODUCT :Microsoft Windows NT Advanced Server
- PROD/VER:3.10
- OPER/SYS:WINDOWS
- KEYWORDS:
-
- -----------------------------------------------------------------------
- The information in this article applies to:
-
- - Microsoft Windows NT operating system, version 3.1
- - Microsoft Windows NT Advanced Server, version 3.1
- ------------------------------------------------------------------------
-
- This article discusses domains, domain controllers, and workstations
- in a Windows NT network.
-
- Domain
- ------
-
- A domain is a grouping of computers and users that eases
- administration of the computers and user accounts. Windows NT Advanced
- Server is required to create a domain. The Windows NT Advanced Servers
- (referred to as "servers") all share a common user account and
- security database, thus enabling each user to have a single account
- which is recognized on all servers in the domain. Security policies
- such as how long passwords remain valid are also held in common by all
- servers in a domain. Windows NT workstations can also be members of a
- domain; the benefit they derive is the ability to recognize user
- accounts that are created on the servers in the domain. Security
- policies on a workstation are always independent of the domain
- security policies, however.
-
- Domain Controller
- -----------------
-
- There is no single database that is shared by all servers in the
- domain; there is a single computer called the domain controller which
- "owns" the master copy of the user account and security database. This
- master copy is then replicated (copied) to all other servers in the
- domain. When the domain controller is unavailable, no changes can be
- made to the domain's user account security database. If necessary, any
- server may be promoted to be the domain controller at any time. This
- should not be done casually because the server may not have the most
- recent changes that have been made on the former domain controller. If
- the domain controller is active when you promote another server to be
- domain controller, there is less risk of losing changes because the
- promoted server is first brought up-to-date with the current domain
- controller before taking over its role. Use Server Manager to choose
- the domain controller.
-
- LAN Manager has "backup domain controllers." These computers are
- particularly suited to being promoted to domain controllers because
- they store the domain database. Whereas LAN Manager also has a "member
- server" classification which does not have the domain database stored
- locally, Windows NT Advanced Servers all have local copies of the
- domain database. Therefore, all Windows NT Advanced Servers are
- equally well suited to being promoted to domain controllers, so they
- are simply referred to as "servers." The domain controller of a
- Windows NT domain must be a Windows NT Advanced Server. Other servers
- in the domain may be LAN Manager servers.
-
- Workstations in Domains
- -----------------------
-
- Windows NT workstations can also be members of a domain. They always
- retain their own local user account and security database. However,
- they gain the ability to recognize the domain accounts. That is, users
- can log on to domain accounts at the workstation, they can remotely
- access the workstation using a domain account, and domain accounts can
- be listed as being granted permissions on files, directories, and so
- on.
-
- Domains vs. Workgroups
- ----------------------
-
- A domain also functions as a workgroup. A workgroup enables easier
- browsing for network resources by visually grouping computers under a
- workgroup name. A domain not only delivers the security benefits
- listed above, but also has the network browsing benefit of workgroups,
- and from that standpoint is indistinguishable from workgroups in the
- network browsing user interface.
-
- Adding Computers to Domains
- ---------------------------
-
- Only Windows NT workstations, Windows NT Advanced Servers, and OS/2
- LAN Manager servers can be added to a Windows NT domain. A domain is
- created by running Setup of a Windows NT Advanced Server and
- indicating the role to be domain controller along with a unique domain
- name.
-
- To Add a Windows NT Advanced Server to a Windows NT Domain
- ----------------------------------------------------------
-
- Run the Setup program for the Windows NT Advanced Server computer and
- choose the server role, entering the domain name and domain
- administrator user name and password when prompted.
-
- Note: You can add the server to the domain in Server Manager first to
- avoid having to enter a domain administrator user name and password.
-
- To Add a Windows NT Workstation to a Windows NT Domain
- ------------------------------------------------------
-
- During setup of the Window NT workstation, choose to add the computer
- to the domain, supplying the domain administrator user name and
- password.
-
- -or-
-
- Choose the Add To Domain option in Server Manager and add the
- workstation. Then set up the workstation and enter the domain name
- when prompted. (If it is already set up, you can join the domain in
- the Network section of Control Panel).
-
- To Add an OS/2 LAN Manager Server to a Windows NT Domain
- --------------------------------------------------------
-
- Follow the methods specified for adding servers to domains in the LAN
- Manager documentation. (This involves creating a user account for the
- server and adding it to the Server group, and so on. User Manager may
- be used for this purpose.)
-
- Additional reference words: 3.10
- KBCategory:
- KBSubCategory: NETSRV NTADSRV
-
- =============================================================================
-
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-
- Copyright Microsoft Corporation 1993.