<s>
Windows	B-Device
Media	I-Device
Services	I-Device
(	O
WMS	O
)	O
is	O
streaming	O
media	B-Application
server	I-Application
software	O
from	O
Microsoft	O
that	O
allows	O
a	O
Windows	O
Server	O
administrator	O
to	O
generate	O
streaming	O
media	O
(	O
audio/video	O
)	O
.	O
</s>
<s>
Only	O
Windows	B-Device
Media	I-Device
,	O
JPEG	O
,	O
and	O
MP3	B-Application
formats	O
are	O
supported	O
.	O
</s>
<s>
WMS	O
is	O
the	O
successor	O
of	O
NetShow	B-Application
Services	O
.	O
</s>
<s>
In	O
addition	O
to	O
streaming	O
,	O
WMS	O
also	O
has	O
the	O
ability	O
to	O
cache	B-Protocol
and	O
record	O
streams	O
,	O
enforce	O
authentication	O
,	O
impose	O
various	O
connection	O
limits	O
,	O
restrict	O
access	O
,	O
use	O
multiple	O
protocols	O
,	O
generate	O
usage	O
statistics	O
,	O
and	O
apply	O
forward	B-Error_Name
error	I-Error_Name
correction	I-Error_Name
(	O
FEC	O
)	O
.	O
</s>
<s>
Both	O
unicast	B-Protocol
and	O
multicast	O
streams	O
are	O
supported	O
(	O
multicast	O
streams	O
also	O
use	O
a	O
proprietary	B-Application
and	O
partially	O
encrypted	O
Windows	B-Application
Media	I-Application
Station	I-Application
( *	O
.nsc	B-Application
)	O
file	O
for	O
use	O
by	O
a	O
player	O
.	O
)	O
</s>
<s>
Typically	O
,	O
Windows	B-Device
Media	I-Device
Player	I-Device
is	O
used	O
to	O
decode	O
and	O
watch/listen	O
to	O
the	O
streams	O
,	O
but	O
other	O
players	O
are	O
also	O
capable	O
of	O
playing	O
unencrypted	O
Windows	B-Device
Media	I-Device
content	O
(	O
Microsoft	B-Application
Silverlight	I-Application
,	O
VLC	B-Application
,	O
MPlayer	B-Application
,	O
etc	O
.	O
)	O
</s>
<s>
64-bit	O
versions	O
of	O
Windows	B-Device
Media	I-Device
Services	I-Device
are	O
also	O
available	O
for	O
increased	O
scalability	O
.	O
</s>
<s>
The	O
Scalable	O
Networking	O
Pack	O
for	O
Windows	B-Application
Server	I-Application
2003	I-Application
adds	O
support	O
for	O
network	O
acceleration	O
and	O
hardware-based	O
offloading	O
,	O
which	O
boosts	O
Windows	B-Device
Media	I-Device
server	O
performance	O
.	O
</s>
<s>
The	O
newest	O
version	O
,	O
Windows	B-Device
Media	I-Device
Services	I-Device
2008	O
,	O
for	O
Windows	B-Device
Server	I-Device
2008	I-Device
,	O
includes	O
a	O
built-in	O
which	O
can	O
be	O
used	O
to	O
configure	O
a	O
Windows	B-Device
Media	I-Device
server	O
either	O
as	O
a	O
cache/proxy	O
server	O
or	O
as	O
a	O
reverse	B-General_Concept
proxy	I-General_Concept
server	I-Application
so	O
that	O
it	O
can	O
provide	O
caching	O
and	O
proxy	O
support	O
to	O
other	O
Windows	B-Device
Media	I-Device
servers	O
.	O
</s>
<s>
Microsoft	O
claims	O
that	O
these	O
offloading	O
technologies	O
nearly	O
double	O
the	O
scalability	O
,	O
making	O
Windows	B-Device
Media	I-Device
Services	I-Device
,	O
according	O
to	O
the	O
claim	O
,	O
the	O
industry	O
's	O
most	O
powerful	O
streaming	O
media	B-Application
server	I-Application
.	O
</s>
<s>
Windows	B-Device
Media	I-Device
Services	I-Device
2008	O
is	O
no	O
longer	O
included	O
with	O
the	O
setup	O
files	O
for	O
the	O
Windows	B-Device
Server	I-Device
2008	I-Device
operating	O
system	O
,	O
but	O
is	O
available	O
as	O
a	O
free	O
download	O
.	O
</s>
<s>
It	O
is	O
also	O
not	O
supported	O
on	O
Windows	B-Device
Server	I-Device
2012	I-Device
,	O
having	O
been	O
replaced	O
with	O
IIS	B-Application
Media	I-Application
Services	I-Application
.	O
</s>
