INTRODUCTION
This section covers basic installation of Windows NT Server, outlining some of the important aspects that must be considered. This is followed by a LAB exercise which installs a domain consisting of two Windows NT Server computers.

SYSTEM REQUIREMENTS
[For Intel based computers]

• Intel 386DX or higher
• 90MB Free Disk Space
• 16MB RAM Minimum

The Role That The Computer Will Perform
When you install a Windows NT Server, you have one of THREE choices to make in deciding what role the Server will perform in the network.

• Primary Domain Controller
  This server is responsible for the accounts on the domain. It must be the first computer installed. All changes to the accounts database are performed on the PDC, and if the PDC goes off-line, no changes can be made.
• Backup Domain Controller
  This server holds a copy of the domain accounts database, which is copied from the PDC. This means that to install a BDC, a domain with a PDC must already be running.
• NT Server
  This server provides resources such as files and printers for users on the domain. They do not hold a copy of the domain accounts database. They cannot be made domain controllers without reinstalling Windows NT Server.

A Domain Controller, once installed, cannot be moved to another domain without first being re-installed. This is because Domain Controllers do not have a local accounts database, but use that of the domain. A Server can be moved to another domain without re-installing, because it has its own local accounts database. You can change the name of the Domain at any time. This is done at the PDC first, then at all the servers and workstations in the domain. You cannot move domain controllers to another domain without first re-installing Windows NT Server.