<s>
In	O
computing	O
,	O
the	O
term	O
remote	O
desktop	O
refers	O
to	O
a	O
software	O
-	O
or	O
operating	B-General_Concept
system	I-General_Concept
feature	O
that	O
allows	O
a	O
personal	B-Device
computer	I-Device
's	O
desktop	O
environment	O
to	O
be	O
run	O
remotely	O
off	O
of	O
one	O
system	O
(	O
usually	O
a	O
PC	O
,	O
but	O
the	O
concept	O
applies	O
equally	O
to	O
a	O
server	B-Application
or	O
a	O
smartphone	B-Application
)	O
,	O
while	O
being	O
displayed	O
on	O
a	O
separate	O
client	B-Protocol
device	I-Protocol
.	O
</s>
<s>
Some	O
allow	O
attaching	O
to	O
an	O
existing	O
user	O
's	O
session	B-Operating_System
and	O
"	O
remote	O
controlling	O
"	O
,	O
either	O
displaying	O
the	O
remote	B-Protocol
control	I-Protocol
session	B-Operating_System
or	O
blanking	O
the	O
screen	O
.	O
</s>
<s>
Taking	O
over	O
a	O
desktop	O
remotely	O
is	O
a	O
form	O
of	O
remote	B-Protocol
administration	I-Protocol
.	O
</s>
<s>
Remote	O
access	O
can	O
also	O
be	O
explained	O
as	O
the	O
remote	B-Protocol
control	I-Protocol
of	O
a	O
computer	O
by	O
using	O
another	O
device	O
connected	O
via	O
the	O
internet	O
or	O
another	O
network	B-Architecture
.	O
</s>
<s>
Remote	O
desktop	O
software	O
captures	O
the	O
mouse	O
and	O
keyboard	O
inputs	O
from	O
the	O
local	O
computer	O
(	O
client	O
)	O
and	O
sends	O
them	O
to	O
the	O
remote	B-Protocol
computer	I-Protocol
(	O
server	B-Application
)	O
.	O
</s>
<s>
The	O
remote	B-Protocol
computer	I-Protocol
in	O
turn	O
sends	O
the	O
display	O
commands	O
to	O
the	O
local	O
computer	O
.	O
</s>
<s>
Remote	O
desktop	B-Device
sharing	I-Device
is	O
accomplished	O
through	O
a	O
common	O
client/server	O
model	O
.	O
</s>
<s>
The	O
client	O
,	O
or	O
VNC	B-Protocol
viewer	O
,	O
is	O
installed	O
on	O
a	O
local	O
computer	O
and	O
then	O
connects	O
via	O
a	O
network	B-Architecture
to	O
a	O
server	B-Application
component	O
,	O
which	O
is	O
installed	O
on	O
the	O
remote	B-Protocol
computer	I-Protocol
.	O
</s>
<s>
In	O
a	O
typical	O
VNC	B-Protocol
session	B-Operating_System
,	O
all	O
keystrokes	O
and	O
mouse	O
clicks	O
are	O
registered	O
as	O
if	O
the	O
client	O
were	O
actually	O
performing	O
tasks	O
on	O
the	O
end-user	O
machine	O
.	O
</s>
<s>
A	O
main	O
use	O
of	O
remote	O
desktop	O
software	O
is	O
remote	B-Protocol
administration	I-Protocol
and	O
remote	O
implementation	O
.	O
</s>
<s>
Most	O
remote	O
access	O
software	O
can	O
be	O
used	O
for	O
"	O
headless	B-Application
computers	I-Application
"	O
:	O
instead	O
of	O
each	O
computer	O
having	O
its	O
own	O
monitor	O
,	O
keyboard	O
,	O
and	O
mouse	O
,	O
or	O
using	O
a	O
KVM	B-Device
switch	I-Device
,	O
one	O
computer	O
can	O
have	O
a	O
monitor	O
,	O
keyboard	O
,	O
mouse	O
,	O
and	O
remote	B-Protocol
control	I-Protocol
software	O
,	O
and	O
control	O
many	O
headless	B-Application
computers	I-Application
.	O
</s>
<s>
Remote	B-Protocol
control	I-Protocol
software	O
combined	O
with	O
telephone	O
communication	O
can	O
be	O
nearly	O
as	O
helpful	O
for	O
novice	O
computer-users	O
as	O
if	O
the	O
support	O
staff	O
were	O
actually	O
there	O
.	O
</s>
<s>
Remote	O
desktop	O
software	O
can	O
be	O
used	O
to	O
access	O
a	O
remote	B-Protocol
computer	I-Protocol
:	O
a	O
physical	O
personal	B-Device
computer	I-Device
to	O
which	O
a	O
user	O
does	O
not	O
have	O
physical	O
access	O
,	O
but	O
that	O
can	O
be	O
accessed	O
or	O
interacted	O
with	O
.	O
</s>
<s>
Unlike	O
servers	B-Application
,	O
remote	B-Protocol
computers	I-Protocol
are	O
mainly	O
used	O
for	O
peer	O
to	O
peer	O
connections	O
,	O
where	O
one	O
device	O
is	O
unattended	O
.	O
</s>
<s>
A	O
remote	B-Protocol
computer	I-Protocol
connection	O
is	O
generally	O
only	O
possible	O
if	O
both	O
devices	O
have	O
a	O
network	B-Architecture
connection	O
.	O
</s>
<s>
Since	O
the	O
advent	O
of	O
cloud	B-Architecture
computing	I-Architecture
remote	O
desktop	O
software	O
can	O
be	O
housed	O
on	O
USB	B-Architecture
hardware	I-Architecture
devices	I-Architecture
,	O
allowing	O
users	O
to	O
connect	O
the	O
device	O
to	O
any	O
PC	O
connected	O
to	O
their	O
network	B-Architecture
or	O
the	O
Internet	O
and	O
recreate	O
their	O
desktop	O
via	O
a	O
connection	O
to	O
the	O
cloud	O
.	O
</s>
<s>
(	O
It	O
is	O
possible	O
with	O
a	O
router	O
with	O
C2S	O
VPN	B-Application
support	O
,	O
and	O
wake	B-Protocol
on	I-Protocol
LAN	I-Protocol
equipment	O
,	O
to	O
establish	O
a	O
virtual	B-Application
private	I-Application
network	I-Application
(	O
VPN	B-Application
)	O
connection	O
with	O
the	O
router	O
over	O
the	O
Internet	O
if	O
not	O
connected	O
to	O
the	O
LAN	B-General_Concept
,	O
switch	O
on	O
a	O
computer	O
connected	O
to	O
the	O
router	O
,	O
then	O
connect	O
to	O
it	O
.	O
)	O
</s>
<s>
Remote	B-Protocol
desktop	I-Protocol
protocols	I-Protocol
include	O
the	O
following	O
:	O
</s>
<s>
Apple	B-Operating_System
Remote	I-Operating_System
Desktop	I-Operating_System
Protocol	O
(	O
ARD	O
)	O
Original	O
protocol	O
for	O
Apple	B-Operating_System
Remote	I-Operating_System
Desktop	I-Operating_System
on	O
macOS	B-Application
machines	O
.	O
</s>
<s>
HP	B-Application
Remote	I-Application
Graphics	I-Application
Software	I-Application
(	O
RGS	O
)	O
a	O
proprietary	O
protocol	O
designed	O
by	O
Hewlett-Packard	O
specifically	O
for	O
high	O
end	O
workstation	O
remoting	O
and	O
collaboration	O
.	O
</s>
<s>
NX	B-Application
technology	I-Application
(	O
NX	B-Application
)	O
a	O
proprietary	O
protocol	O
designed	O
by	O
NoMachine	B-Application
with	O
open-source	O
derivatives	O
available	O
from	O
other	O
forked	O
projects	O
.	O
</s>
<s>
Remote	B-Protocol
Frame	I-Protocol
Buffer	I-Protocol
Protocol	I-Protocol
(	O
RFB	O
)	O
A	O
framebuffer	O
level	O
cross-platform	O
protocol	O
that	O
VNC	B-Protocol
is	O
based	O
on	O
.	O
</s>
<s>
Splashtop	B-Protocol
a	O
high	O
performance	O
remote	B-Protocol
desktop	I-Protocol
protocol	I-Protocol
developed	O
by	O
Splashtop	B-Protocol
,	O
fully	O
optimized	O
for	O
hardware	O
(	O
H.264	O
)	O
including	O
Intel	O
/	O
AMD	O
chipsets	O
,	O
NVIDIA	O
/	O
ATI	O
GPU	O
&	O
APU	O
,	O
Qualcomm	O
Snapdragon	O
,	O
and	O
NVIDIA	O
Tegra	O
.	O
</s>
<s>
By	O
optimizing	O
for	O
different	O
profiles	O
of	O
media	O
codecs	O
,	O
Splashtop	B-Protocol
can	O
deliver	O
high	O
frame	O
rates	O
with	O
low	O
latency	O
,	O
and	O
also	O
low	O
power	O
consumption	O
.	O
</s>
<s>
Xpra	B-Application
a	O
protocol	O
originally	O
developed	O
for	O
forwarding	O
X11	B-Operating_System
application	O
seamlessly	O
with	O
audio	O
,	O
video	O
,	O
remote	O
printing	O
,	O
etc	O
.	O
</s>
<s>
Wake-on-LAN	B-Protocol
a	O
standard	O
protocol	O
for	O
remotely	O
waking	O
up	O
computers	O
that	O
are	O
in	O
low-power	O
mode	O
(	O
turned	O
off	O
,	O
but	O
still	O
have	O
access	O
to	O
a	O
power	O
source	O
)	O
.	O
</s>
<s>
A	O
(	O
,	O
sometimes	O
called	O
)	O
is	O
a	O
type	O
of	O
malware	O
that	O
controls	O
a	O
system	O
through	O
a	O
remote	O
network	B-Architecture
connection	O
.	O
</s>
<s>
While	O
desktop	B-Device
sharing	I-Device
and	O
remote	B-Protocol
administration	I-Protocol
have	O
many	O
legal	O
uses	O
,	O
"	O
RAT	O
"	O
connotes	O
criminal	O
or	O
malicious	O
activity	O
.	O
</s>
