<s>
In	O
the	O
OSI	O
networking	B-Architecture
model	O
,	O
Data	B-Protocol
Link	I-Protocol
Control	I-Protocol
(	O
DLC	O
)	O
is	O
the	O
service	O
provided	O
by	O
the	O
data	B-Protocol
link	I-Protocol
layer	I-Protocol
.	O
</s>
<s>
Network	B-Protocol
interface	I-Protocol
cards	I-Protocol
have	O
a	O
DLC	O
address	O
that	O
identifies	O
each	O
card	O
;	O
for	O
instance	O
,	O
Ethernet	O
and	O
other	O
types	O
of	O
cards	O
have	O
a	O
48-bit	O
MAC	O
address	O
built	O
into	O
the	O
cards	O
 '	O
firmware	B-Application
when	O
they	O
are	O
manufactured	O
.	O
</s>
<s>
There	O
is	O
also	O
a	O
network	O
protocol	O
with	O
the	O
name	O
Data	B-Protocol
Link	I-Protocol
Control	I-Protocol
.	O
</s>
<s>
It	O
is	O
comparable	O
to	O
better-known	O
protocols	O
such	O
as	O
TCP/IP	B-Protocol
or	O
AppleTalk	B-Application
.	O
</s>
<s>
DLC	O
is	O
a	O
transport	O
protocol	O
used	O
by	O
IBM	B-Architecture
SNA	I-Architecture
mainframe	B-Architecture
computers	I-Architecture
and	O
peripherals	O
and	O
compatible	O
equipment	O
.	O
</s>
<s>
In	O
computer	B-Architecture
networking	I-Architecture
,	O
it	O
is	O
typically	O
used	O
for	O
communications	O
between	O
network-attached	O
printers	O
,	O
computers	O
and	O
servers	O
,	O
for	O
example	O
by	O
HP	O
in	O
their	O
JetDirect	O
print	B-Application
servers	I-Application
.	O
</s>
<s>
While	O
it	O
was	O
widely	O
used	O
up	O
until	O
the	O
time	O
of	O
Windows	B-Application
2000	I-Application
,	O
versions	O
from	O
Windows	B-Application
XP	I-Application
onward	O
do	O
not	O
include	O
support	O
for	O
DLC	O
.	O
</s>
