<s>
Active	B-Protocol
Directory	I-Protocol
naming	B-General_Concept
context	I-General_Concept
(	O
NC	O
)	O
or	O
directory	O
partition	O
,	O
is	O
a	O
logical	O
portion	O
of	O
the	O
Microsoft	O
's	O
Active	B-Protocol
Directory	I-Protocol
(	O
AD	O
)	O
.	O
</s>
<s>
Active	B-Protocol
Directory	I-Protocol
can	O
support	O
tens	O
of	O
millions	O
of	O
objects	O
.	O
</s>
<s>
To	O
scale	O
up	O
those	O
objects	O
,	O
the	O
Active	B-Protocol
Directory	I-Protocol
database	O
is	O
divided	O
up	O
into	O
partitions	O
for	O
replication	O
and	O
administration	O
.	O
</s>
<s>
By	O
default	O
,	O
the	O
Active	B-Protocol
Directory	I-Protocol
Domain	O
Service	O
contains	O
the	O
following	O
naming	B-General_Concept
contexts	I-General_Concept
:	O
</s>
