<s>
TightVNC	B-Language
is	O
a	O
free	B-License
and	I-License
open-source	I-License
remote	B-Protocol
desktop	I-Protocol
software	I-Protocol
server	O
and	O
client	O
application	O
for	O
Linux	B-Application
and	O
Windows	O
.	O
</s>
<s>
A	O
server	O
for	O
macOS	B-Application
is	O
available	O
under	O
a	O
commercial	B-Application
source	O
code	O
license	O
only	O
,	O
without	O
SDK	O
or	O
binary	O
version	O
provided	O
.	O
</s>
<s>
Constantin	O
Kaplinsky	O
developed	O
TightVNC	B-Language
,	O
using	O
and	O
extending	O
the	O
RFB	B-Protocol
protocol	I-Protocol
of	O
Virtual	B-Protocol
Network	I-Protocol
Computing	I-Protocol
(	O
VNC	B-Protocol
)	O
to	O
allow	O
end-users	O
to	O
control	O
another	O
computer	O
's	O
screen	O
remotely	O
.	O
</s>
<s>
TightVNC	B-Language
uses	O
so-called	O
"	O
tight	O
encoding	O
"	O
of	O
areas	O
,	O
which	O
improves	O
performance	O
over	O
low	O
bandwidth	O
connection	O
.	O
</s>
<s>
It	O
is	O
effectively	O
a	O
combination	O
of	O
the	O
JPEG	O
and	O
zlib	B-Language
compression	O
mechanisms	O
.	O
</s>
<s>
It	O
is	O
possible	O
to	O
watch	O
videos	O
and	O
play	O
DirectX	O
games	O
through	O
TightVNC	B-Language
over	O
a	O
broadband	O
connection	O
,	O
albeit	O
at	O
a	O
low	O
frame	O
rate	O
.	O
</s>
<s>
TightVNC	B-Language
includes	O
many	O
other	O
common	O
features	O
of	O
VNC	B-Protocol
derivatives	O
,	O
such	O
as	O
file	O
transfer	O
capability	O
.	O
</s>
<s>
TightVNC	B-Language
is	O
cross-compatible	O
with	O
other	O
client	O
and	O
server	O
implementations	O
of	O
VNC	B-Protocol
;	O
however	O
,	O
tight	O
encoding	O
is	O
not	O
supported	O
by	O
most	O
other	O
implementations	O
,	O
so	O
it	O
is	O
necessary	O
to	O
use	O
TightVNC	B-Language
at	O
both	O
ends	O
to	O
gain	O
the	O
full	O
advantage	O
of	O
its	O
enhancements	O
.	O
</s>
<s>
Among	O
notable	O
enhancements	O
are	O
file	O
transfers	O
,	O
support	O
for	O
the	O
DemoForge	O
DFMirage	O
mirror	O
driver	O
(	O
a	O
type	O
of	O
virtual	O
display	O
driver	O
)	O
to	O
detect	O
screen	O
updates	O
(	O
saves	O
CPU	O
time	O
and	O
increases	O
the	O
performance	O
of	O
TightVNC	B-Language
)	O
,	O
ability	O
to	O
zoom	O
the	O
picture	O
and	O
automatic	O
SSH	O
tunneling	O
on	O
Unix	O
.	O
</s>
<s>
Since	O
the	O
2.0	O
beta	O
,	O
TightVNC	B-Language
supports	O
auto	O
scaling	O
,	O
which	O
resizes	O
the	O
viewer	O
window	O
to	O
the	O
remote	O
users	O
desktop	O
size	O
,	O
regardless	O
of	O
the	O
resolution	O
of	O
the	O
host	O
computer	O
.	O
</s>
<s>
TightVNC	B-Language
1.3.10	O
,	O
released	O
in	O
March	O
2009	O
,	O
is	O
the	O
last	O
version	O
to	O
support	O
Linux/Unix	O
.	O
</s>
<s>
This	O
version	O
is	O
still	O
often	O
used	O
in	O
guides	O
to	O
set	O
up	O
VNC	B-Protocol
for	O
Linux	B-Application
.	O
</s>
<s>
RemoteVNC	O
is	O
a	O
fork	O
of	O
the	O
TightVNC	B-Language
project	O
and	O
adds	O
automatic	O
traversal	O
of	O
NAT	B-Protocol
and	O
firewalls	B-Application
using	O
Jingle	B-Protocol
.	O
</s>
<s>
The	O
developers	O
have	O
also	O
produced	O
a	O
portable	B-Application
version	O
of	O
the	O
software	O
,	O
available	O
as	O
both	O
U3	B-Application
and	O
standalone	O
downloads	O
.	O
</s>
<s>
TurboVNC	O
is	O
based	O
on	O
the	O
TightVNC	B-Language
1.3.x	O
,	O
xf4vnc	O
,	O
X.org,	O
and	O
TigerVNC	B-Language
code	O
bases	O
and	O
includes	O
numerous	O
performance	O
enhancements	O
and	O
features	O
targeted	O
at	O
3D	O
and	O
video	O
workloads	O
.	O
</s>
<s>
TigerVNC	B-Language
is	O
VNC	B-Protocol
server	I-Protocol
and	O
client	O
software	O
,	O
started	O
as	O
a	O
fork	O
of	O
TightVNC	B-Language
in	O
2009	O
,	O
after	O
three	O
years	O
of	O
inactivity	O
in	O
TightVNC	B-Language
trunk	O
.	O
</s>
