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Various Active Directory components are used to build a directory MCSA required exams structure that meets the needs of your organization. The following Active Directory components represent logical structures in an organization: domains, organizational units (OUs), trees, and forests. The following Active Directory components represent physical structures in an organization: sites (physical subnets) and domain controllers. Active Directory com?pletely separates the logical structure from the physical structure.
Logical Structures
In Active Directory, you organize resources in a logical structurea structure that mirrors organizational modelsusing domains, OUs, trees, and forests. Grouping resources logically allows you to easily find a resource by its name rather than by remembering its physical location. Because you group resources logically, Active Directory makes the network’s physical structure transparent to users. Figure 1-4 illus?trates the relationship of the Active Directory domains, OUs, trees, and forests.
The core unit of logical structure in Active Directory is the domain, which can store millions of objects. Objects stored in a domain are those considered vital to the network. These vital objects are items the members of the networked community need in order to do their jobs: printers, documents, e-mail addresses, databases, users, distributed components, and other resources. All network objects exist within a domain, and each domain stores information only about the objects it contains. Active Directory is made up free 70-291 test questions of one or more domains. A domain can span more than one physical location. Domains share the following characteristics:
All network objects exist within a domain, and each domain stores information only about the objects that it contains.
A domain is a security boundary. Access to domain objects is governed by access control lists (ACLs), which contain the permissions associated with the objects.
Such permissions control which users can gain access to an object and what type of access they can gain. In the Windows Server 2003 family, objects include files,folders, shares, printers, and other Active Directory objects. None of the security policies and settingssuch as administrative rights, security policies, and ACLscan cross from one domain to another. You, as the domain administrator, have absolute rights to set policies only within your domain.
Active Directory authentication and authorization services provide protection for data while minimizing barriers to doing business over the Internet. Active Directory supports multiple authentication protocols, such as the Kerberos version 5 protocol, Secure Sockets Layer (SSL) version 3, and Transport Layer Security (TLS) using X.509 version 3 certificates Free Network+ study guides. In addition, Active Directory provides security groups that span domains.