<s>
UltraVNC	B-Language
(	O
sometimes	O
written	O
uVNC	B-Language
)	O
is	O
an	O
open-source	B-Application
remote-administration/remote	O
-desktop-software	O
utility	O
.	O
</s>
<s>
The	O
client	O
supports	O
Microsoft	B-Application
Windows	I-Application
and	O
Linux	B-Application
but	O
the	O
server	O
only	O
supports	O
Windows	O
.	O
</s>
<s>
It	O
uses	O
the	O
VNC	B-Protocol
protocol	O
to	O
control/access	O
another	O
computer	O
remotely	O
over	O
a	O
network	B-Architecture
connection	O
.	O
</s>
<s>
UltraVNC	B-Language
allows	O
the	O
use	O
of	O
a	O
remote	O
computer	O
as	O
if	O
the	O
user	O
were	O
in	O
front	O
of	O
it	O
.	O
</s>
<s>
UltraVNC	B-Language
bears	O
a	O
strong	O
resemblance	O
to	O
RealVNC	B-Language
Free	O
Edition	O
.	O
</s>
<s>
However	O
,	O
in	O
addition	O
to	O
remote	B-Protocol
control	I-Protocol
,	O
it	O
adds	O
various	O
features	O
,	O
such	O
as	O
an	O
encryption	O
plugin	O
to	O
secure	O
the	O
client/server	B-Operating_System
connection	O
.	O
</s>
<s>
The	O
two	O
computers	O
must	O
be	O
able	O
to	O
communicate	O
across	O
a	O
network	B-Architecture
,	O
such	O
as	O
a	O
local	O
subnet	O
,	O
internal	O
network	B-Architecture
,	O
or	O
the	O
Internet	O
.	O
</s>
<s>
The	O
software	O
is	O
free	O
and	O
distributed	O
under	O
the	O
terms	O
of	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
.	O
</s>
<s>
It	O
can	O
use	O
an	O
optional	O
mirror	B-Application
driver	I-Application
,	O
to	O
be	O
installed	O
on	O
the	O
remotely	O
controlled	O
computer	O
,	O
for	O
fast	O
and	O
efficient	O
notification	O
of	O
screen	O
changes	O
with	O
very	O
low	O
CPU	O
load	O
,	O
although	O
this	O
is	O
not	O
needed	O
on	O
latest	O
versions	O
of	O
Windows	O
10	O
.	O
</s>
<s>
UltraVNC	B-Language
is	O
developed	O
in	O
the	O
C	B-Language
,	O
C++	B-Language
,	O
and	O
Java	B-Language
programming	I-Language
languages	I-Language
.	O
</s>
<s>
UltraVNC	B-Language
is	O
notable	O
as	O
the	O
base	O
for	O
free	O
no-install	O
remote	O
help	O
desk	O
options	O
including	O
UltraVNC	B-Language
Single	O
Click	O
(	O
"	O
SC	O
"	O
)	O
and	O
PCHelpWare	O
.	O
</s>
