<s>
Dynamic	B-Device
device	I-Device
mapping	I-Device
is	O
a	O
technology	O
for	O
USB	B-Protocol
KVM	B-Device
switches	I-Device
which	O
is	O
sometimes	O
implemented	O
as	O
an	O
alternative	O
to	O
standard	O
USB	B-Protocol
keyboard	B-Device
and	O
mouse	B-Device
emulation	O
.	O
</s>
<s>
With	O
DDM	O
(	O
Dynamic	B-Device
Device	I-Device
Mapping	I-Device
)	O
Technology	O
,	O
the	O
communication	O
between	O
shared	O
peripherals	B-Device
and	O
all	O
connected	O
systems	O
are	O
maintained	O
100%	O
of	O
the	O
time	O
,	O
even	O
as	O
a	O
user	O
switches	O
between	O
the	O
KVM	O
ports	O
.	O
</s>
<s>
This	O
makes	O
generic	O
device	O
emulation	O
unnecessary	O
as	O
the	O
DDM	O
allows	O
each	O
connected	O
computer	O
system	O
to	O
believe	O
all	O
connected	O
I/O	B-General_Concept
devices	I-General_Concept
are	O
remaining	O
connected	O
even	O
as	O
the	O
KVM	B-Device
switch	I-Device
might	O
move	O
to	O
another	O
port	O
.	O
</s>
<s>
Many	O
USB	B-Protocol
KVM	B-Device
devices	I-Device
provide	O
peripheral	O
emulation	O
,	O
sending	O
signals	O
to	O
the	O
computers	O
that	O
are	O
not	O
currently	O
selected	O
to	O
simulate	O
a	O
keyboard	B-Device
,	O
mouse	B-Device
and	O
monitor	O
being	O
connected	O
.	O
</s>
<s>
Peripheral	O
emulation	O
services	O
embedded	O
in	O
the	O
hardware	O
also	O
provides	O
continuous	O
support	O
where	O
computers	O
require	O
constant	O
communication	O
with	O
the	O
peripherals	B-Device
.	O
</s>
<s>
In	O
addition	O
,	O
some	O
types	O
of	O
computer	O
systems	O
do	O
not	O
treat	O
USB	B-Protocol
devices	O
as	O
hot-pluggable	B-Device
,	O
which	O
means	O
the	O
keyboard	B-Device
and	O
mouse	B-Device
will	O
not	O
be	O
re-detected	O
when	O
switching	O
back	O
to	O
a	O
particular	O
KVM	O
port	O
.	O
</s>
<s>
When	O
emulating	O
a	O
USB	B-Protocol
keyboard	B-Device
,	O
mouse	B-Device
,	O
and	O
monitor	O
it	O
is	O
impossible	O
for	O
most	O
KVM	O
's	O
to	O
simulate	O
various	O
types	O
of	O
I/O	B-General_Concept
devices	I-General_Concept
specifically	O
.	O
</s>
<s>
As	O
a	O
result	O
,	O
KVM	B-Device
switches	I-Device
will	O
sometimes	O
offer	O
inconsistent	O
performance	O
and	O
even	O
sometimes	O
unsolved	O
compatibility	O
issues	O
with	O
the	O
shared	O
keyboard	B-Device
,	O
mouse	B-Device
,	O
and	O
other	O
devices	O
.	O
</s>
<s>
The	O
intent	O
of	O
Dynamic	B-Device
Device	I-Device
Mapping	I-Device
is	O
to	O
resolve	O
the	O
issues	O
that	O
standard	O
device	O
mapping	O
sometimes	O
faces	O
.	O
</s>
<s>
secured	O
user	O
login	O
by	O
sharing	O
USB	B-Protocol
smart	O
card	O
or	O
biometrics	O
reader	O
(	O
e.g.	O
</s>
