<s>
Remote	B-Protocol
Desktop	I-Protocol
Protocol	I-Protocol
(	O
RDP	O
)	O
is	O
a	O
proprietary	B-Application
protocol	O
developed	O
by	O
Microsoft	O
Corporation	O
which	O
provides	O
a	O
user	O
with	O
a	O
graphical	B-Application
interface	I-Application
to	O
connect	O
to	O
another	O
computer	O
over	O
a	O
network	O
connection	O
.	O
</s>
<s>
Clients	O
exist	O
for	O
most	O
versions	O
of	O
Microsoft	B-Application
Windows	I-Application
(	O
including	O
Windows	O
Mobile	O
but	O
the	O
support	O
has	O
ended	O
)	O
,	O
Linux	B-Application
(	O
for	O
example	O
Remmina	B-Language
)	O
,	O
Unix	B-Application
,	O
macOS	B-Application
,	O
iOS	B-Application
,	O
Android	B-Application
,	O
and	O
other	O
operating	B-General_Concept
systems	I-General_Concept
.	O
</s>
<s>
RDP	O
servers	O
are	O
built	O
into	O
Windows	B-Application
operating	I-Application
systems	I-Application
;	O
an	O
RDP	O
server	O
for	O
Unix	B-Application
and	O
OS	O
X	O
also	O
exists	O
(	O
for	O
example	O
xrdp	B-Application
)	O
.	O
</s>
<s>
By	O
default	O
,	O
the	O
server	O
listens	O
on	O
TCP	B-Protocol
port	B-Protocol
3389	I-Protocol
and	O
UDP	B-Protocol
port	B-Protocol
3389	I-Protocol
.	O
</s>
<s>
Microsoft	O
currently	O
refers	O
to	O
their	O
official	O
RDP	O
client	O
software	O
as	O
Remote	B-Protocol
Desktop	I-Protocol
Connection	I-Protocol
,	O
formerly	O
"	O
Terminal	B-Protocol
Services	I-Protocol
Client	O
"	O
.	O
</s>
<s>
Every	O
version	O
of	O
Microsoft	B-Application
Windows	I-Application
from	O
Windows	B-Application
XP	I-Application
onward	O
includes	O
an	O
installed	O
Remote	B-Protocol
Desktop	I-Protocol
Connection	I-Protocol
(	O
RDC	O
)	O
(	O
"	O
Terminal	B-Protocol
Services	I-Protocol
"	O
)	O
client	O
(	O
)	O
whose	O
version	O
is	O
determined	O
by	O
that	O
of	O
the	O
operating	B-General_Concept
system	I-General_Concept
or	O
by	O
the	O
last	O
applied	O
Windows	O
Service	O
Pack	O
.	O
</s>
<s>
The	O
Terminal	B-Protocol
Services	I-Protocol
server	O
is	O
supported	O
as	O
an	O
official	O
feature	O
on	O
Windows	B-Device
NT	I-Device
4.0	I-Device
Terminal	O
Server	O
Edition	O
,	O
released	O
in	O
1998	O
,	O
Windows	B-Application
2000	I-Application
Server	O
,	O
all	O
editions	O
of	O
Windows	B-Application
XP	I-Application
except	O
Windows	B-Application
XP	I-Application
Home	O
Edition	O
,	O
Windows	B-Application
Server	I-Application
2003	I-Application
,	O
Windows	B-Application
Home	I-Application
Server	I-Application
,	O
on	O
Windows	B-Device
Fundamentals	I-Device
for	I-Device
Legacy	I-Device
PCs	I-Device
,	O
in	O
Windows	B-Application
Vista	I-Application
Ultimate	O
,	O
Enterprise	O
and	O
Business	O
editions	O
,	O
Windows	B-Device
Server	I-Device
2008	I-Device
and	O
Windows	B-Device
Server	I-Device
2008	I-Device
R2	O
and	O
on	O
Windows	B-Device
7	I-Device
Professional	O
and	O
above	O
.	O
</s>
<s>
Microsoft	O
provides	O
the	O
client	O
required	O
for	O
connecting	O
to	O
newer	O
RDP	O
versions	O
for	O
downlevel	O
operating	B-General_Concept
systems	I-General_Concept
.	O
</s>
<s>
Since	O
the	O
server	O
improvements	O
are	O
not	O
available	O
downlevel	O
,	O
the	O
features	O
introduced	O
with	O
each	O
newer	O
RDP	O
version	O
only	O
work	O
on	O
downlevel	O
operating	B-General_Concept
systems	I-General_Concept
when	O
connecting	O
to	O
a	O
higher	O
version	O
RDP	O
server	O
from	O
these	O
older	O
operating	B-General_Concept
systems	I-General_Concept
,	O
and	O
not	O
when	O
using	O
the	O
RDP	O
server	O
in	O
the	O
older	O
operating	B-General_Concept
system	I-General_Concept
.	O
</s>
<s>
Based	O
on	O
the	O
ITU-T	O
T.128	O
application	O
sharing	O
protocol	O
(	O
during	O
draft	O
also	O
known	O
as	O
"	O
T.share	O
"	O
)	O
from	O
the	O
T.120	O
recommendation	O
series	O
,	O
the	O
first	O
version	O
of	O
RDP	O
(	O
named	O
version	O
4.0	O
)	O
was	O
introduced	O
by	O
Microsoft	O
with	O
"	O
Terminal	B-Protocol
Services	I-Protocol
"	O
,	O
as	O
a	O
part	O
of	O
their	O
product	O
Windows	B-Device
NT	I-Device
4.0	I-Device
Server	O
,	O
Terminal	O
Server	O
Edition	O
.	O
</s>
<s>
The	O
Terminal	B-Protocol
Services	I-Protocol
Edition	O
of	O
NT	B-Device
4.0	I-Device
relied	O
on	O
Citrix	B-Application
's	O
MultiWin	O
technology	O
,	O
previously	O
provided	O
as	O
a	O
part	O
of	O
Citrix	B-Application
WinFrame	O
atop	O
Windows	O
NT	O
3.51	O
,	O
in	O
order	O
to	O
support	O
multiple	O
users	O
and	O
login	O
sessions	O
simultaneously	O
.	O
</s>
<s>
Microsoft	O
required	O
Citrix	B-Application
to	O
license	O
their	O
MultiWin	O
technology	O
to	O
Microsoft	O
in	O
order	O
to	O
be	O
allowed	O
to	O
continue	O
offering	O
their	O
own	O
terminal-services	O
product	O
,	O
then	O
named	O
Citrix	B-Application
MetaFrame	O
,	O
atop	O
Windows	B-Device
NT	I-Device
4.0	I-Device
.	O
</s>
<s>
The	O
Citrix-provided	O
DLLs	O
included	O
in	O
Windows	B-Device
NT	I-Device
4.0	I-Device
Terminal	B-Protocol
Services	I-Protocol
Edition	O
still	O
carry	O
a	O
Citrix	B-Application
copyright	O
rather	O
than	O
a	O
Microsoft	O
copyright	O
.	O
</s>
<s>
This	O
version	O
was	O
introduced	O
with	O
Windows	B-Application
2000	I-Application
Server	O
,	O
added	O
support	O
for	O
a	O
number	O
of	O
features	O
,	O
including	O
printing	O
to	O
local	O
printers	O
,	O
and	O
aimed	O
to	O
improve	O
network	O
bandwidth	O
usage	O
.	O
</s>
<s>
This	O
version	O
was	O
introduced	O
with	O
Windows	B-Application
XP	I-Application
Professional	O
and	O
included	O
support	O
for	O
24-bit	O
color	O
and	O
sound	O
.	O
</s>
<s>
The	O
client	O
is	O
available	O
for	O
Windows	B-Application
2000	I-Application
,	O
Windows	O
9x	O
,	O
Windows	B-Device
NT	I-Device
4.0	I-Device
.	O
</s>
<s>
With	O
this	O
version	O
,	O
the	O
name	O
of	O
the	O
client	O
was	O
changed	O
from	O
Terminal	B-Protocol
Services	I-Protocol
Client	O
to	O
Remote	B-Protocol
Desktop	I-Protocol
Connection	I-Protocol
;	O
the	O
heritage	O
remains	O
to	O
this	O
day	O
,	O
however	O
,	O
as	O
the	O
underlying	O
executable	O
is	O
still	O
named	O
.	O
</s>
<s>
This	O
version	O
was	O
introduced	O
with	O
Windows	B-Application
Server	I-Application
2003	I-Application
,	O
included	O
support	O
for	O
console	O
mode	O
connections	O
,	O
a	O
session	O
directory	O
,	O
and	O
local	O
resource	O
mapping	O
.	O
</s>
<s>
It	O
also	O
introduces	O
Transport	B-Protocol
Layer	I-Protocol
Security	I-Protocol
(	O
TLS	O
)	O
1.0	O
for	O
server	O
authentication	O
,	O
and	O
to	O
encrypt	O
terminal	O
server	O
communications	O
.	O
</s>
<s>
This	O
version	O
is	O
built	O
into	O
Windows	B-Application
XP	I-Application
Professional	O
x64	O
Edition	O
and	O
Windows	B-Application
Server	I-Application
2003	I-Application
x64	O
&	O
x86	O
Editions	O
.	O
</s>
<s>
This	O
version	O
was	O
introduced	O
with	O
Windows	B-Application
Vista	I-Application
and	O
incorporated	O
support	O
for	O
Windows	B-Device
Presentation	I-Device
Foundation	I-Device
applications	O
,	O
Network	B-General_Concept
Level	I-General_Concept
Authentication	I-General_Concept
,	O
multi-monitor	O
spanning	O
and	O
large	O
desktop	O
support	O
,	O
and	O
TLS	B-Protocol
1.0	I-Protocol
connections	O
.	O
</s>
<s>
Version	O
6.0	O
client	O
is	O
available	O
for	O
Windows	B-Application
XP	I-Application
SP2	O
,	O
Windows	B-Application
Server	I-Application
2003	I-Application
SP1/SP2	O
(	O
x86	O
and	O
x64	O
editions	O
)	O
and	O
Windows	B-Application
XP	I-Application
Professional	O
x64	O
Edition	O
.	O
</s>
<s>
Microsoft	O
Remote	B-Protocol
Desktop	I-Protocol
Connection	I-Protocol
Client	O
for	O
Macintosh	O
OS	O
X	O
is	O
also	O
available	O
with	O
support	O
for	O
Intel	O
and	O
PowerPC	O
Mac	B-Application
OS	I-Application
versions	O
10.4.9	O
and	O
greater	O
.	O
</s>
<s>
This	O
version	O
was	O
released	O
in	O
February	O
2008	O
and	O
is	O
included	O
with	O
Windows	B-Device
Server	I-Device
2008	I-Device
,	O
as	O
well	O
as	O
with	O
Windows	B-Application
Vista	I-Application
Service	O
Pack	O
1	O
.	O
</s>
<s>
The	O
client	O
is	O
included	O
with	O
Windows	B-Application
XP	I-Application
SP3	O
.	O
</s>
<s>
In	O
addition	O
to	O
changes	O
related	O
to	O
how	O
a	O
remote	O
administrator	O
connects	O
to	O
the	O
"	O
console	O
"	O
,	O
this	O
version	O
has	O
new	O
functionality	O
introduced	O
in	O
Windows	B-Device
Server	I-Device
2008	I-Device
,	O
such	O
as	O
connecting	O
remotely	O
to	O
individual	O
programs	O
and	O
a	O
new	O
client-side	O
printer	O
redirection	O
system	O
that	O
makes	O
the	O
client	O
's	O
print	O
capabilities	O
available	O
to	O
applications	O
running	O
on	O
the	O
server	O
,	O
without	O
having	O
to	O
install	O
print	O
drivers	O
on	O
the	O
server	O
also	O
on	O
the	O
other	O
hand	O
,	O
remote	O
administrator	O
can	O
freely	O
install	O
,	O
add/remove	O
any	O
software	O
or	O
setting	O
at	O
the	O
client	O
's	O
end	O
.	O
</s>
<s>
This	O
version	O
was	O
released	O
to	O
manufacturing	O
in	O
July	O
2009	O
and	O
is	O
included	O
with	O
Windows	B-Device
Server	I-Device
2008	I-Device
R2	O
,	O
as	O
well	O
as	O
with	O
Windows	B-Device
7	I-Device
.	O
</s>
<s>
With	O
this	O
release	O
,	O
also	O
changed	O
from	O
Terminal	B-Protocol
Services	I-Protocol
to	O
Remote	B-Protocol
Desktop	I-Protocol
Services	I-Protocol
.	O
</s>
<s>
The	O
RDP	O
7.0	O
client	O
is	O
available	O
on	O
Windows	B-Application
XP	I-Application
SP3	O
and	O
Windows	B-Application
Vista	I-Application
SP1/SP2	O
through	O
KB969084	O
.	O
</s>
<s>
The	O
RDP	O
7.0	O
client	O
is	O
not	O
officially	O
supported	O
on	O
Windows	B-Application
Server	I-Application
2003	I-Application
x86	O
and	O
Windows	B-Application
Server	I-Application
2003	I-Application
/	O
Windows	B-Application
XP	I-Application
Professional	O
x64	O
editions	O
.	O
</s>
<s>
Most	O
RDP	O
7.0	O
features	O
like	O
Aero	O
glass	O
remote	O
use	O
,	O
bidirectional	O
audio	O
,	O
Windows	O
Media	O
Player	O
redirection	O
,	O
multiple	O
monitor	O
support	O
and	O
Remote	O
Desktop	O
Easy	O
Print	O
are	O
only	O
available	O
in	O
Windows	B-Device
7	I-Device
Enterprise	O
or	O
Ultimate	O
editions	O
.	O
</s>
<s>
Release	O
7.1	O
of	O
RDP	O
was	O
included	O
with	O
Windows	B-Device
7	I-Device
Service	O
Pack	O
1	O
and	O
Windows	B-Device
Server	I-Device
2008	I-Device
R2	O
SP1	O
in	O
2010	O
.	O
</s>
<s>
This	O
version	O
was	O
released	O
in	O
Windows	B-Application
8	I-Application
and	O
Windows	B-Device
Server	I-Device
2012	I-Device
.	O
</s>
<s>
This	O
version	O
has	O
new	O
functions	O
such	O
as	O
Adaptive	O
Graphics	O
(	O
progressive	O
rendering	O
and	O
related	O
techniques	O
)	O
,	O
automatic	O
selection	O
of	O
TCP	B-Protocol
or	O
UDP	B-Protocol
as	O
transport	O
protocol	O
,	O
multi	B-Application
touch	I-Application
support	O
,	O
DirectX	O
11	O
support	O
for	O
vGPU	O
,	O
USB	O
redirection	O
supported	O
independently	O
of	O
vGPU	O
support	O
,	O
etc	O
.	O
</s>
<s>
A	O
"	O
connection	O
quality	O
"	O
button	O
is	O
displayed	O
in	O
the	O
RDP	O
client	O
connection	O
bar	O
for	O
RDP	O
8.0	O
connections	O
;	O
clicking	O
on	O
it	O
provides	O
further	O
information	O
about	O
connection	O
,	O
including	O
whether	O
UDP	B-Protocol
is	O
in	O
use	O
or	O
not	O
.	O
</s>
<s>
The	O
RDP	O
8.0	O
client	O
and	O
server	O
components	O
are	O
also	O
available	O
as	O
an	O
add-on	O
for	O
Windows	B-Device
7	I-Device
SP1	O
.	O
</s>
<s>
The	O
RDP	O
8.0	O
client	O
is	O
also	O
available	O
for	O
Windows	B-Device
Server	I-Device
2008	I-Device
R2	O
SP1	O
,	O
but	O
the	O
server	O
components	O
are	O
not	O
.	O
</s>
<s>
The	O
add-on	O
requires	O
the	O
DTLS	B-General_Concept
protocol	O
to	O
be	O
installed	O
as	O
prerequisite	O
.	O
</s>
<s>
After	O
installing	O
the	O
updates	O
,	O
for	O
the	O
RDP	O
8.0	O
protocol	O
to	O
be	O
enabled	O
between	O
Windows	B-Device
7	I-Device
machines	O
,	O
an	O
extra	O
configuration	O
step	O
is	O
needed	O
using	O
the	O
Group	O
Policy	O
editor	O
.	O
</s>
<s>
A	O
new	O
feature	O
in	O
RDP	O
8.0	O
is	O
limited	O
support	O
for	O
RDP	O
session	O
nesting	O
;	O
it	O
only	O
works	O
for	O
Windows	B-Application
8	I-Application
and	O
Server	B-Device
2012	I-Device
though	O
,	O
Windows	B-Device
7	I-Device
and	O
Server	B-Device
2008	I-Device
R2	O
(	O
even	O
with	O
the	O
RDP	O
8.0	O
update	O
)	O
do	O
not	O
support	O
this	O
feature	O
.	O
</s>
<s>
The	O
Aero	O
Glass	O
remoting	B-Operating_System
feature	O
(	O
applicable	O
to	O
Windows	B-Device
7	I-Device
machines	O
connecting	O
to	O
each	O
other	O
)	O
has	O
also	O
been	O
removed	O
in	O
RDP	O
8	O
.	O
</s>
<s>
This	O
version	O
was	O
released	O
with	O
Windows	B-Device
8.1	I-Device
and	O
Windows	B-Device
Server	I-Device
2012	I-Device
R2	O
.	O
</s>
<s>
A	O
RDP	O
8.1	B-Device
client	O
update	O
exists	O
for	O
Windows	B-Device
7	I-Device
SP1	O
as	O
well	O
,	O
but	O
unlike	O
the	O
RDP	O
8.0	O
update	O
for	O
Windows	B-Device
7	I-Device
,	O
it	O
does	O
not	O
add	O
a	O
RDP	O
8.1	B-Device
server	O
component	O
to	O
Windows	B-Device
7	I-Device
.	O
</s>
<s>
Furthermore	O
,	O
if	O
RDP	O
8.0	O
server	O
function	O
is	O
desired	O
on	O
Windows	B-Device
7	I-Device
,	O
the	O
KB	O
2592687	O
(	O
RDP	O
8.0	O
client	O
and	O
server	O
components	O
)	O
update	O
must	O
be	O
installed	O
before	O
installing	O
the	O
RDP	O
8.1	B-Device
update	O
.	O
</s>
<s>
Support	O
for	O
session	O
shadowing	O
was	O
added	O
back	O
in	O
RDP	O
version	O
8.1	B-Device
.	O
</s>
<s>
This	O
version	O
also	O
fixes	O
some	O
visual	O
glitches	O
with	O
Microsoft	B-Operating_System
Office	I-Operating_System
2013	I-Operating_System
when	O
running	O
as	O
a	O
RemoteApp	O
.	O
</s>
<s>
Version	O
8.1	B-Device
of	O
the	O
RDP	O
also	O
enables	O
a	O
"	O
restricted	O
admin	O
"	O
mode	O
.	O
</s>
<s>
128-bit	O
encryption	O
,	O
using	O
the	O
RC4	B-Algorithm
encryption	O
algorithm	O
,	O
as	O
of	O
Version	O
6	O
.	O
</s>
<s>
Port	B-Protocol
Redirection	O
allows	O
applications	O
running	O
within	O
the	O
terminal	O
session	O
to	O
access	O
local	O
serial	O
and	O
parallel	O
ports	O
directly	O
.	O
</s>
<s>
Seamless	O
Windows	O
:	O
remote	O
applications	O
can	O
run	O
on	O
a	O
client	O
machine	O
that	O
is	O
served	O
by	O
a	O
Remote	B-Protocol
Desktop	I-Protocol
connection	I-Protocol
.	O
</s>
<s>
Terminal	B-Protocol
Services	I-Protocol
Gateway	O
:	O
enables	O
the	O
ability	O
to	O
use	O
a	O
front-end	O
IIS	O
server	O
to	O
accept	O
connections	O
(	O
over	O
port	B-Protocol
443	I-Protocol
)	O
for	O
back-end	O
Terminal	B-Protocol
Services	I-Protocol
servers	O
via	O
an	O
https	B-Protocol
connection	I-Protocol
,	O
similar	O
to	O
how	O
RPC	B-Operating_System
over	O
https	B-Protocol
allows	O
Outlook	O
clients	O
to	O
connect	O
to	O
a	O
back-end	O
Exchange	O
2003	O
server	O
.	O
</s>
<s>
Requires	O
Windows	B-Device
Server	I-Device
2008	I-Device
.	O
</s>
<s>
Support	O
for	O
remoting	B-Operating_System
the	O
Aero	O
Glass	O
Theme	O
(	O
or	O
Composed	O
Desktop	O
)	O
,	O
including	O
ClearType	O
font-smoothing	O
technology	O
.	O
</s>
<s>
Support	O
for	O
remoting	B-Operating_System
Windows	B-Device
Presentation	I-Device
Foundation	I-Device
applications	O
:	O
compatible	O
clients	O
that	O
have	O
.NET	O
Framework	O
3.0	O
support	O
can	O
display	O
full	O
Windows	B-Device
Presentation	I-Device
Foundation	I-Device
effects	O
on	O
a	O
local	O
machine	O
.	O
</s>
<s>
Fully	O
configurable	O
and	O
scriptable	O
via	O
Windows	B-Library
Management	I-Library
Instrumentation	I-Library
.	O
</s>
<s>
Support	O
for	O
Transport	B-Protocol
Layer	I-Protocol
Security	I-Protocol
(	O
TLS	O
)	O
1.0	O
on	O
both	O
server	O
and	O
client	O
ends	O
(	O
can	O
be	O
negotiated	O
if	O
both	O
parties	O
agree	O
,	O
but	O
not	O
mandatory	O
in	O
a	O
default	O
configuration	O
of	O
any	O
version	O
of	O
Windows	O
)	O
.	O
</s>
<s>
RemoteFX	O
:	O
RemoteFX	O
provides	O
virtualized	O
GPU	O
support	O
and	O
host-side	O
encoding	O
;	O
it	O
ships	O
as	O
part	O
of	O
Windows	B-Device
Server	I-Device
2008	I-Device
R2	O
SP1	O
.	O
</s>
<s>
Administrators	O
can	O
enable	O
transport	B-Protocol
layer	I-Protocol
encryption	I-Protocol
to	O
mitigate	O
this	O
risk	O
.	O
</s>
<s>
Unusually	O
,	O
patches	O
were	O
also	O
made	O
available	O
for	O
several	O
versions	O
of	O
Windows	O
that	O
had	O
reached	O
their	O
end-of-life	O
,	O
such	O
as	O
Windows	B-Application
XP	I-Application
.	O
</s>
<s>
For	O
instance	O
,	O
the	O
open-source	O
command-line	O
client	O
rdesktop	B-Protocol
is	O
available	O
for	O
Linux/Unix	O
and	O
Microsoft	B-Application
Windows	I-Application
operating	I-Application
systems	I-Application
.	O
</s>
<s>
There	O
are	O
many	O
GUI	B-Application
clients	O
,	O
like	O
tsclient	B-Language
and	O
KRDC	O
,	O
that	O
are	O
built	O
on	O
top	O
of	O
rdesktop	B-Protocol
.	O
</s>
<s>
In	O
2009	O
,	O
rdesktop	B-Protocol
was	O
forked	O
as	O
FreeRDP	O
,	O
a	O
new	O
project	O
aiming	O
at	O
modularizing	O
the	O
code	O
,	O
addressing	O
various	O
issues	O
,	O
and	O
implementing	O
new	O
features	O
.	O
</s>
<s>
Around	O
2011	O
,	O
the	O
project	O
decided	O
to	O
abandon	O
forking	O
and	O
instead	O
rewrite	O
under	O
Apache	B-Application
License	I-Application
,	O
adding	O
more	O
features	O
like	O
RemoteFX	O
,	O
RemoteApp	O
,	O
and	O
NTLMv2	O
.	O
</s>
<s>
There	O
's	O
a	O
GTK-based	O
client	O
named	O
Remmina	B-Language
also	O
based	O
on	O
FreeRDP	O
.	O
</s>
<s>
FreeRDP	O
offers	O
server	O
implementations	O
for	O
macOS	B-Application
and	O
Windows	O
.	O
</s>
<s>
On	O
other	O
systems	O
including	O
Linux	B-Application
,	O
software	O
packages	O
may	O
build	O
upon	O
FreeRDP	O
to	O
implement	O
a	O
complete	O
server	O
.	O
</s>
<s>
Weston	O
,	O
the	O
compositor	O
in	O
Wayland	B-Language
,	O
uses	O
FreeRDP	O
to	O
implement	O
an	O
rdp	O
server	O
it	O
terms	O
"	O
rdp-backend	O
"	O
.	O
</s>
<s>
This	O
server	O
is	O
in	O
turn	O
used	O
by	O
Microsoft	O
to	O
provide	O
graphics	O
support	O
(	O
WSLg	O
)	O
in	O
its	O
Windows	O
Subsystem	O
for	O
Linux	B-Application
.	O
</s>
<s>
Open-source	O
RDP	O
servers	O
on	O
Unix	B-Application
include	O
FreeRDP	O
(	O
see	O
above	O
)	O
,	O
ogon	O
project	O
and	O
xrdp	B-Application
.	O
</s>
<s>
The	O
Windows	B-Protocol
Remote	I-Protocol
Desktop	I-Protocol
Connection	O
client	O
can	O
be	O
used	O
to	O
connect	O
to	O
such	O
a	O
server	O
.	O
</s>
<s>
Proprietary	B-Application
RDP	O
client	O
solutions	O
such	O
as	O
rdpclient	O
are	O
available	O
as	O
a	O
stand-alone	O
application	O
or	O
embedded	O
with	O
client	O
hardware	O
.	O
</s>
<s>
A	O
new	O
access	O
paradigm	O
,	O
browser-based	O
access	O
,	O
has	O
enabled	O
users	O
to	O
access	O
Windows	O
desktops	O
and	O
applications	O
on	O
any	O
RDP	O
hosts	O
,	O
such	O
as	O
Microsoft	O
Remote	O
Desktop	O
(	O
RDS	O
)	O
Session	O
Hosts	O
(	O
Terminal	B-Protocol
Services	I-Protocol
)	O
and	O
virtual	O
desktops	O
,	O
as	O
well	O
as	O
remote	O
physical	O
PCs	O
.	O
</s>
<s>
There	O
is	O
also	O
a	O
VirtualBox	B-Operating_System
Remote	O
Display	O
Protocol	O
(	O
VRDP	O
)	O
used	O
in	O
the	O
VirtualBox	B-Operating_System
virtual	O
machine	O
implementation	O
by	O
Oracle	B-Application
.	O
</s>
<s>
This	O
protocol	O
is	O
compatible	O
with	O
all	O
RDP	O
clients	O
,	O
such	O
as	O
that	O
provided	O
with	O
Windows	O
but	O
,	O
unlike	O
the	O
original	O
RDP	O
,	O
can	O
be	O
configured	O
to	O
accept	O
unencrypted	O
and	O
password	O
unprotected	O
connections	O
,	O
which	O
may	O
be	O
useful	O
in	O
secure	O
and	O
trusted	O
networks	O
,	O
such	O
as	O
home	O
or	O
office	O
LANs	B-General_Concept
.	O
</s>
<s>
It	O
does	O
not	O
matter	O
which	O
operating	B-General_Concept
system	I-General_Concept
is	O
installed	O
as	O
a	O
guest	O
because	O
VRDP	O
is	O
implemented	O
on	O
the	O
virtual	O
machine	O
(	O
host	O
)	O
level	O
,	O
not	O
in	O
the	O
guest	O
system	O
.	O
</s>
<s>
The	O
proprietary	B-Application
VirtualBox	B-Operating_System
Extension	O
Pack	O
is	O
required	O
.	O
</s>
