Windows Active directory Trust type and difference

Windows Active directory Trust type and difference:

You can use the New Trust Wizard or the Netdom command-line tool to create four types of trusts: external trusts, realm trusts, forest trusts, and shortcut trusts. The following table describes these trust types.

 

Trust type Transitivity Direction Description
External Nontransitive One-way or two-way Use external trusts to provide access to resources that are located on a Windows NT 4.0 domain or a domain that is located in a separate forest that is not joined by a forest trust. For more information, see Understanding When to Create an External Trust.
Realm Transitive or nontransitive One-way or two-way Use realm trusts to form a trust relationship between a non-Windows Kerberos realm and an Active Directory domain. For more information, see Understanding When to Create a Realm Trust.
Forest Transitive One-way or two-way Use forest trusts to share resources between forests. If a forest trust is a two-way trust, authentication requests that are made in either forest can reach the other forest. For more information, see Understanding When to Create a Forest Trust.
Shortcut Transitive One-way or two-way Use shortcut trusts to improve user logon times between two domains within An Active Directory forest. This is useful when two domains are separated by two domain trees. For more information, see Understanding When to Create a Shortcut Trust.

When you create external trusts, shortcut trusts, realm trusts, or forest trusts, you have the option to create each side of the trust separately or both sides of a trust simultaneously.

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