This video looks at utilizing the server naming convention to replicate a hierarchy within AD (Active Directory Users and Computers).
In later videos we will also look at applying Group Policy Objects to these OU’s.
Extract from Microsofts article below;
“While there is no technical limit to the number of levels in your OU structure, for manageability we recommend that you limit your OU structure to a depth of no more than 10 levels. There is no technical limit to the number of OUs on each level. Note that Active Directory Domain Services (AD DS)-enabled applications might have restrictions on the number of characters used in the distinguished name (that is, the full Lightweight Directory Access Protocol (LDAP) path to the object in the directory) or on the OU depth within the hierarchy.”
LDAP will also be covered in later videos.
In addation to the above Microsoft article, Microsoft also provide aids for designing your enviroment (although these are slightly older).
https://www.microsoft.com/en-us/download/details.aspx?id=9608