<s>
HP	B-Application
Universal	I-Application
Print	I-Application
Driver	I-Application
(	O
UPD	O
)	O
is	O
an	O
intelligent	O
print	B-Application
driver	I-Application
that	O
supports	O
a	O
broad	O
range	O
of	O
HP	O
LaserJet	O
printers	O
and	O
MFPs	O
.	O
</s>
<s>
Developed	O
by	O
Hewlett-Packard	O
,	O
it	O
combines	O
a	O
general	O
purpose	O
driver	O
(	O
UNIDRV	O
or	O
PSCRIPT	B-Language
)	O
and	O
HP	O
proprietary	O
extensions	O
.	O
</s>
<s>
This	O
advanced	O
print	B-Application
driver	I-Application
has	O
the	O
ability	O
to	O
discover	O
HP	O
printing	O
devices	O
and	O
automatically	O
configure	O
itself	O
to	O
the	O
device	O
capabilities	O
(	O
e.g.	O
,	O
duplex	O
,	O
color	O
,	O
finishing	O
,	O
etc	O
.	O
</s>
<s>
HP	B-Application
Universal	I-Application
Print	I-Application
Driver	I-Application
is	O
a	O
Microsoft	B-Application
Windows	I-Application
solution	O
that	O
provides	O
two	O
modes	O
of	O
operation	O
,	O
traditional	O
and	O
dynamic	O
.	O
</s>
<s>
In	O
traditional	O
mode	O
,	O
the	O
HP	O
UPD	O
behaves	O
similarly	O
to	O
traditional	O
print	B-Application
drivers	I-Application
.	O
</s>
<s>
HP	O
’s	O
Universal	O
Print	B-Application
Driver	I-Application
is	O
based	O
on	O
Microsoft	O
’s	O
universal	O
core	O
drivers	O
UNIDRV	O
and	O
PSCRIPT	B-Language
.	O
</s>
<s>
Regardless	O
of	O
the	O
device	O
discovery	O
method	O
used	O
,	O
the	O
Microsoft	O
core	O
driver	O
is	O
updated	O
accordingly	O
and	O
the	O
new	O
device	O
information	O
is	O
then	O
reflected	O
in	O
the	O
normal	O
print	B-Application
driver	I-Application
user	O
interface	O
.	O
</s>
<s>
HP	O
provides	O
two	O
different	O
Universal	O
Print	B-Application
Drivers	I-Application
:	O
PCL6	O
and	O
emulation	O
PostScript	B-Language
.	O
</s>
<s>
HP	O
UPD	O
is	O
available	O
as	O
a	O
Microsoft	B-Application
Windows	I-Application
32-bit	O
or	O
64-bit	O
driver	O
and	O
automatically	O
configures	O
itself	O
to	O
one	O
of	O
35	O
currently	O
supported	O
languages	O
based	O
upon	O
the	O
language	O
of	O
the	O
host	O
system	O
.	O
</s>
<s>
In	O
dynamic	O
mode	O
,	O
searching	O
for	O
devices	O
is	O
accomplished	O
using	O
the	O
mDNS	B-Protocol
discovery	O
protocol	O
(	O
aka	O
Bonjour	B-Application
)	O
.	O
</s>
<s>
The	O
mDNS	B-Protocol
protocol	O
performs	O
satisfactorily	O
for	O
devices	O
residing	O
on	O
the	O
same	O
subnet	O
only	O
.	O
</s>
<s>
Whether	O
discovered	O
,	O
entered	O
,	O
or	O
chosen	O
,	O
the	O
HP	O
universal	O
printing	O
dialog	O
box	O
submits	O
SNMP	B-Protocol
requests	O
to	O
the	O
target	O
device	O
’s	O
IP	O
address	O
.	O
</s>
<s>
Using	O
enterprise	O
auto	O
configuration	O
(	O
EAC	O
)	O
and	O
a	O
bidirectional	O
communications	O
port	O
,	O
SNMP	B-Protocol
requests	O
ascertain	O
a	O
device	O
’s	O
configurations	O
and	O
capabilities	O
.	O
</s>
<s>
The	O
results	O
are	O
used	O
by	O
HP	O
UPD	O
to	O
update	O
the	O
print	B-Application
driver	I-Application
table	O
in	O
the	O
Windows	B-Protocol
registry	I-Protocol
to	O
accurately	O
reflect	O
the	O
target	O
device	O
’s	O
capabilities	O
.	O
</s>
<s>
In	O
traditional	O
mode	O
HP	O
UPD	O
is	O
bound	O
to	O
a	O
print	O
queue	O
and	O
behaves	O
like	O
a	O
normal	O
printer	B-Application
driver	I-Application
with	O
the	O
addition	O
of	O
bi-directional	O
communications	O
for	O
device	O
queries	O
and	O
real	O
time	O
print	O
job	O
status	O
.	O
</s>
<s>
The	O
configuration	O
file	O
controls	O
the	O
print	B-Application
driver	I-Application
settings	O
and	O
takes	O
effect	O
when	O
the	O
driver	O
is	O
installed	O
.	O
</s>
<s>
DDU	O
is	O
used	O
to	O
pre-configure	O
a	O
print	B-Application
driver	I-Application
for	O
deployment	O
.	O
</s>
<s>
When	O
the	O
package	O
is	O
run	O
on	O
the	O
client	O
computer	O
,	O
the	O
new	O
configuration	O
file	O
configures	O
the	O
printer	B-Application
driver	I-Application
after	O
it	O
is	O
installed	O
,	O
and	O
does	O
not	O
interfere	O
with	O
WHQL	O
certification	O
.	O
</s>
<s>
MPLs	O
are	O
XML	B-Protocol
files	O
that	O
can	O
be	O
created	O
manually	O
,	O
with	O
the	O
HP	O
MPA	O
utility	O
,	O
or	O
exported	O
from	O
HP	O
Web	O
Jetadmin	O
.	O
</s>
<s>
By	O
querying	O
the	O
printer	O
through	O
SNMP	B-Protocol
get	O
commands	O
,	O
network	O
traffic	O
is	O
kept	O
to	O
a	O
minimum	O
and	O
is	O
only	O
present	O
during	O
printing	O
.	O
</s>
