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Active Directory Interview Question and Answers

>What is Active Directory?
Active Directory is a Meta Data. Active Directory is a data base which stores a data base like your user information, computer information and also other network object info. It has capabilities to manage and administer the complete Network which connect with AD.

>What is domain?
Windows NT and Windows 2000, a domain is a set of network resources (applications, printers, and so forth) for a group of users. The user needs only to log in to the domain to gain access to the resources, which may be located on a number of different servers in the network. The ‘domain’ is simply your computer address not to confuse with an URL. A domain address might look something like 211.170.469.

>What is domain controller?
A Domain controller (DC) is a server that responds to security authentication requests (logging in, checking permissions, etc.) within the Windows Server domain. A domain is a concept introduced in Windows NT whereby a user may be granted access to a number of computer resources with the use of a single username and password combination.

>What is LDAP?
Lightweight Directory Access Protocol LDAP is the industry standard directory access protocol, making Active Directory widely accessible to management and query applications. Active Directory supports LDAPv3 and LDAPv2.

>What is KCC?
KCC (knowledge consistency checker) is used to generate replication topology for inter site replication and for intra-site replication. Within a site replication traffic is done via remote procedure calls over ip, while between sites it is done through either RPC or SMTP.

>Where is the AD database held? What other folders are related to AD?
The AD data base is store in c:\windows\ntds\NTDS.DIT.

>What is the SYSVOL folder?
The sysVOL folder stores the server’s copy of the domain’s public files. The contents such as group policy, users etc of the sysvol folder are replicated to all domain controllers in the domain.

>Where are the Windows NT Primary Domain Controller (PDC) and its Backup Domain Controller (BDC) in Server 2003? 
The Active Directory replaces them. Now all domain controllers share a multi master peer-to-peer read and write relationship that hosts copies of the Active Directory.

>Cannot create a new universal user group. Why?
Universal groups are allowed only in native-mode Windows Server 2003 environments. Native mode requires that all domain controllers be promoted to Windows Server 2003 Active Directory.

>What is LSDOU?
 Its group policy inheritance model, where the policies are applied to Local machines, Sites, Domains and Organizational Units.

>Why doesn’t LSDOU work under Windows NT? 
If the NTConfig.pol file exists, it has the highest priority among the numerous policies.

>How many number of permitted unsuccessful logons on Administrator account? Unlimited. Remember, though, that it’s the Administrator account, not any account that’s part of the Administrators group.

> What’s the difference between guest accounts in Server 2003 and other editions?
More restrictive in Windows Server 2003.

> How many passwords by default are remembered when you check “Enforce Password History Remembered”?
User’s last 6 passwords.

> Can GC Server and Infrastructure place in single server?
No, As Infrastructure master does the same job as the GC. It does not work together.

> Which is service in your windows is responsible for replication of Domain controller to another domain controller.
KCC generates the replication topology.
Use SMTP / RPC to replicate changes.

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