OBTAIN AN IP ADDRESS BY USING DHCPBEFORE YOU BEGIN THIS EXERCISE, YOU...

14-19Lesson 2 Important Active Directory ConceptsDistinguished name (DN)Relative distinguished name (RDN)Domain_name / Users / Sales / Managers / Jane DoeDomain_nameUsers OUSales OUManagers OU• DN must be uniqueJane Doe in the Directory.• RDN must be unique in an OU.e

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Figure 14-9 DNs must be unique to a directory, whereas RDNs are unique within an OU.

Globally Unique Identifier

A globally unique identifier (GUID) is a 128-bit number that is guaranteed to be

unique. GUIDs are assigned to objects when they are created. The GUID never

changes, even if you move or rename the object. Applications can store the GUID of

an object and use it to retrieve that object regardless of its current DN.

User Principal Name

User accounts have a “friendly” name, the user principal name (UPN). The UPN is

composed of a “shorthand” name for the user account and the DNS name of the tree

in which the user account object resides. For example, user Firstname Lastname (sub-

stitute the first and last names of an actual user) in the microsoft.com tree might have

a UPN of [email protected] (using the full first name and the first letter of the

last name).

Lesson Review

Use the following questions to help determine whether you have learned enough to

move on to the next lesson. If you have difficulty answering these questions, review

the material in this lesson before beginning the next lesson. You can find answers to

these questions in the “Questions and Answers” section at the end of this chapter.