Active Directory Terms -(Various Objects and their Functions)

Active Directory Terms -(Various Objects and their Functions )
What is an OU in AD ?
What is user accounts in AD ?
What is Group Accounts In AD ?
What is Computer Account in AD ?

What is  an OU in AD?
Answer:

•  An Organizational Unit is a container (read: folder) that holds AD Objects like User Accounts, Computer Accounts, and Groups.
•  OU’s help to keep your Objects organized, but also are used to control what Users can and can’t do.
• You can also pass the buck by delegating control over OU’s.

What is User Account ?
Answer:
    User Account : User Account is  an Active Directory Object that allows users to access the resources.

What is Group Accounts In AD ?
Answer:
Group Account : An Active Directory Object that allows or denies access to network resources ( Like Folder and Printers ) for users and computers .

What is Computer Account in AD ?
Answer:

• Computer Accounts allow AD to keep track of and control the computers in your network. A computer without an Account in AD can’t access the network—it’s a security thing
• Computer Accounts live in OU’s, which will allow you to install software to all machines in an OU at once!
• When you join a computer to a Domain (you’ll need Domain Administrator level credentials), a Computer Account is automatically created in AD.
• After Joining the Domain, you’ll have to move your Computer Accounts to the appropriate OU.
• You can create accounts manually, but it’s not a very good idea. Keeping track of your computers is a really really good idea

Hope theses question and answers will help to prepare a candidate for Interview.