What is Active Directory?
Active directory is a domain controller which is use to authenticate and administrate the group of computer, user, server etc. remotely. All the policies and security will be applicable on the client machine which one is join the domain. And all this policies and security is defined in active directory.

What is DNS?
Domain Name Service/Domain Name System. Provides resolution of name to IP addressing and resolution of IP addresses to names.

What is DHCP?
It gives Addresses automatically to the client who is requesting for an IP address
Centralized IP Address management
DHCP prevent IP address conflict and help conserve the use of client IP Address on the on the network
DHCP reduces the complexity and amount of administrator work by assigning TCP/IP configuration automatically to the clients
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 group policy in active directory? What are Group Policy objects (GPOs)?
Group Policy objects, other than the local Group Policy object, are virtual objects. The policy setting information of a GPO is actually stored in two locations: the Group Policy container and the Group Policy template.
The Group Policy container is an Active Directory container that stores GPO properties, including information on version, GPO status, and a list of components that have settings in the GPO.
The Group Policy template is a folder structure within the file system that stores Administrative Template-based policies, security settings, script files, and information regarding applications that are available for Group Policy Software Installation.
The Group Policy template is located in the system volume folder (Sysvol) in the Policies subfolder for its domain.

What is DHCP scope?
DHCP scopes are used to define ranges of addresses from which a DHCP server can assign IP addresses to clients.
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