<s>
SPDY	B-Protocol
(	O
pronounced	O
"	O
speedy	O
"	O
)	O
is	O
an	O
obsolete	O
open-specification	O
communication	O
protocol	O
developed	O
for	O
transporting	O
web	O
content	O
.	O
</s>
<s>
SPDY	B-Protocol
became	O
the	O
basis	O
for	O
HTTP/2	B-Protocol
specification	O
.	O
</s>
<s>
However	O
,	O
HTTP/2	B-Protocol
diverged	O
from	O
SPDY	B-Protocol
and	O
eventually	O
HTTP/2	B-Protocol
subsumed	O
all	O
usecases	O
of	O
SPDY	B-Protocol
.	O
</s>
<s>
After	O
HTTP/2	B-Protocol
was	O
ratified	O
as	O
a	O
standard	O
,	O
major	O
implementers	O
,	O
including	O
Google	B-Application
,	O
Mozilla	B-Operating_System
,	O
and	O
Apple	O
,	O
deprecated	O
SPDY	B-Protocol
in	O
favor	O
of	O
HTTP/2	B-Protocol
.	O
</s>
<s>
Since	O
2021	O
,	O
no	O
modern	O
browser	O
supports	O
SPDY	B-Protocol
.	O
</s>
<s>
Google	B-Application
announced	O
SPDY	B-Protocol
in	O
late	O
2009	O
and	O
deployed	O
in	O
2010	O
.	O
</s>
<s>
SPDY	B-Protocol
manipulates	O
HTTP	B-Protocol
traffic	O
,	O
with	O
particular	O
goals	O
of	O
reducing	O
web	O
page	O
load	O
latency	O
and	O
improving	O
web	O
security	O
.	O
</s>
<s>
SPDY	B-Protocol
achieves	O
reduced	O
latency	O
through	O
compression	B-General_Concept
,	O
multiplexing	B-Architecture
,	O
and	O
prioritization	O
,	O
although	O
this	O
depends	O
on	O
a	O
combination	O
of	O
network	O
and	O
website	O
deployment	O
conditions	O
.	O
</s>
<s>
The	O
name	O
"	O
SPDY	B-Protocol
"	O
is	O
a	O
trademark	O
of	O
Google	B-Application
and	O
is	O
not	O
an	O
acronym	O
.	O
</s>
<s>
HTTP/2	B-Protocol
was	O
first	O
discussed	O
when	O
it	O
became	O
apparent	O
that	O
SPDY	B-Protocol
was	O
gaining	O
traction	O
with	O
implementers	O
(	O
like	O
Mozilla	B-Operating_System
and	O
nginx	B-Operating_System
)	O
,	O
and	O
was	O
showing	O
significant	O
improvements	O
over	O
HTTP/1.x	O
.	O
</s>
<s>
After	O
a	O
call	O
for	O
proposals	O
and	O
a	O
selection	O
process	O
,	O
SPDY	B-Protocol
was	O
chosen	O
as	O
the	O
basis	O
for	O
HTTP/2	B-Protocol
.	O
</s>
<s>
,	O
the	O
group	O
developing	O
SPDY	B-Protocol
stated	O
publicly	O
that	O
it	O
was	O
working	O
toward	O
standardisation	O
(	O
available	O
as	O
an	O
Internet	O
Draft	O
)	O
.	O
</s>
<s>
The	O
first	O
draft	O
of	O
HTTP/2	B-Protocol
used	O
SPDY	B-Protocol
as	O
the	O
working	O
base	O
for	O
its	O
specification	O
draft	O
and	O
editing	O
.	O
</s>
<s>
The	O
IETF	O
working	O
group	O
for	O
HTTPbis	B-Protocol
has	O
released	O
the	O
draft	O
of	O
HTTP/2	B-Protocol
.	O
</s>
<s>
SPDY	B-Protocol
(	O
draft-mbelshe-httpbis-spdy-00	O
)	O
was	O
chosen	O
as	O
the	O
starting	O
point	O
.	O
</s>
<s>
Throughout	O
the	O
process	O
,	O
the	O
core	O
developers	O
of	O
SPDY	B-Protocol
have	O
been	O
involved	O
in	O
the	O
development	O
of	O
HTTP/2	B-Protocol
,	O
including	O
both	O
Mike	O
Belshe	O
and	O
Roberto	O
Peon	O
.	O
</s>
<s>
Chromium	B-Language
,	O
Mozilla	B-Application
Firefox	I-Application
,	O
Opera	B-Application
,	O
Amazon	B-Protocol
Silk	I-Protocol
,	O
Internet	B-Application
Explorer	I-Application
,	O
and	O
Safari	B-Application
expressed	O
support	O
for	O
SPDY	B-Protocol
at	O
the	O
time	O
.	O
</s>
<s>
In	O
February	O
2015	O
,	O
Google	B-Application
announced	O
that	O
following	O
ratification	O
of	O
the	O
HTTP/2	B-Protocol
standard	O
,	O
support	O
for	O
SPDY	B-Protocol
would	O
be	O
deprecated	O
,	O
and	O
that	O
support	O
for	O
SPDY	B-Protocol
would	O
be	O
withdrawn	O
.	O
</s>
<s>
On	O
May	O
15	O
,	O
2015	O
,	O
HTTP/2	B-Protocol
was	O
officially	O
ratified	O
as	O
.	O
</s>
<s>
On	O
February	O
11	O
,	O
2016	O
,	O
Google	B-Application
announced	O
that	O
Chrome	B-Application
would	O
no	O
longer	O
support	O
SPDY	B-Protocol
after	O
May	O
15	O
,	O
2016	O
,	O
the	O
one-year	O
anniversary	O
of	O
which	O
standardized	O
HTTP/2	B-Protocol
.	O
</s>
<s>
On	O
January	O
25	O
,	O
2019	O
,	O
Apple	O
announced	O
that	O
SPDY	B-Protocol
would	O
be	O
deprecated	O
in	O
favor	O
of	O
HTTP/2	B-Protocol
,	O
and	O
would	O
be	O
removed	O
in	O
future	O
releases	O
.	O
</s>
<s>
Google	B-Application
removed	O
SPDY	B-Protocol
support	O
in	O
Google	B-Application
Chrome	I-Application
51	O
which	O
was	O
released	O
in	O
2016	O
.	O
</s>
<s>
Mozilla	B-Operating_System
removed	O
it	O
in	O
Firefox	B-Application
50	O
.	O
</s>
<s>
Apple	O
has	O
deprecated	O
the	O
technology	O
in	O
macOS	B-Application
10.14.4	O
and	O
iOS	B-Application
12.2	O
.	O
</s>
<s>
SPDY	B-Protocol
is	O
a	O
versioned	O
protocol	O
.	O
</s>
<s>
SPDY	B-Protocol
control	O
frames	O
contain	O
15	O
dedicated	O
bits	O
to	O
indicate	O
the	O
version	O
of	O
protocol	O
used	O
for	O
the	O
current	O
session	O
.	O
</s>
<s>
Version	O
1	O
:	O
version	O
1	O
of	O
the	O
SPDY	B-Protocol
protocol	O
is	O
not	O
used	O
anymore	O
.	O
</s>
<s>
Nginx	B-Operating_System
supports	O
SPDY/2	O
in	O
versions	O
prior	O
to	O
1.5.10	O
.	O
</s>
<s>
Firefox	B-Application
28	O
and	O
recent	O
versions	O
of	O
Chrome	B-Application
drop	O
support	O
for	O
it	O
.	O
</s>
<s>
OpenLiteSpeed	O
1.1	O
and	O
up	O
support	O
SPDY/2	O
.	O
</s>
<s>
Version	O
3	O
:	O
SPDY	B-Protocol
v3	O
introduced	O
support	O
for	O
flow	O
control	O
,	O
updated	O
the	O
compression	B-General_Concept
dictionary	O
,	O
and	O
removed	O
wasted	O
space	O
from	O
certain	O
frames	O
,	O
along	O
with	O
other	O
minor	O
bug	O
fixes	O
.	O
</s>
<s>
Firefox	B-Application
supports	O
SPDY	B-Protocol
v3	O
in	O
Firefox	B-Application
15	O
.	O
</s>
<s>
OpenLiteSpeed	O
1.1	O
and	O
up	O
support	O
SPDY/3	O
.	O
</s>
<s>
Version	O
3.1	O
:	O
SPDY	B-Protocol
v3.1	O
introduced	O
support	O
for	O
session-layer	O
flow	O
control	O
,	O
and	O
removed	O
the	O
CREDENTIALS	O
frame	O
(	O
and	O
associated	O
error	O
codes	O
)	O
.	O
</s>
<s>
Firefox	B-Application
27	O
has	O
added	O
SPDY	B-Protocol
3.1	O
support	O
.	O
</s>
<s>
OpenLiteSpeed	O
1.2.7	O
introduces	O
SPDY/3.1	O
support	O
.	O
</s>
<s>
Nginx	B-Operating_System
1.5.10	O
supports	O
SPDY/3.1	O
.	O
</s>
<s>
F5	O
BIGIP	O
11.6	O
supports	O
SPDY/3.1	O
.	O
</s>
<s>
Version	O
4.0	O
:	O
SPDY	B-Protocol
v4	O
alpha3	O
is	O
more	O
closely	O
aligned	O
with	O
the	O
HTTP/2	B-Protocol
draft	O
;	O
it	O
has	O
a	O
new	O
stream	O
flow	O
control	O
and	O
error	O
codes	O
unified	O
with	O
the	O
HTTP/2	B-Protocol
draft	O
.	O
</s>
<s>
The	O
goal	O
of	O
SPDY	B-Protocol
is	O
to	O
reduce	O
web	O
page	O
load	O
time	O
.	O
</s>
<s>
This	O
is	O
achieved	O
by	O
prioritizing	O
and	O
multiplexing	B-Architecture
the	O
transfer	O
of	O
web	O
page	O
subresources	O
so	O
that	O
only	O
one	O
connection	O
per	O
client	O
is	O
required	O
.	O
</s>
<s>
TLS	B-Protocol
encryption	I-Protocol
is	O
nearly	O
ubiquitous	O
in	O
SPDY	B-Protocol
implementations	O
,	O
and	O
transmission	O
headers	O
are	O
gzip	B-Application
-	O
or	O
DEFLATE-compressed	O
by	O
design	O
(	O
in	O
contrast	O
to	O
HTTP	B-Protocol
,	O
where	O
the	O
headers	O
are	O
sent	O
as	O
human-readable	O
text	O
)	O
.	O
</s>
<s>
SPDY	B-Protocol
requires	O
the	O
use	O
of	O
SSL/TLS	B-Protocol
(	O
with	O
TLS	B-Protocol
extension	O
ALPN	B-Protocol
)	O
for	O
security	O
but	O
it	O
also	O
supports	O
operation	O
over	O
plain	O
TCP	B-Protocol
.	O
</s>
<s>
The	O
requirement	O
for	O
SSL	B-Protocol
is	O
for	O
security	O
and	O
to	O
avoid	O
incompatibility	O
when	O
communication	O
is	O
across	O
a	O
proxy	B-Application
.	O
</s>
<s>
SPDY	B-Protocol
does	O
not	O
replace	O
HTTP	B-Protocol
;	I-Protocol
it	O
modifies	O
the	O
way	O
HTTP	B-Protocol
requests	I-Protocol
and	O
responses	O
are	O
sent	O
over	O
the	O
wire	O
.	O
</s>
<s>
This	O
means	O
that	O
all	O
existing	O
server-side	O
applications	O
can	O
be	O
used	O
without	O
modification	O
if	O
a	O
SPDY-compatible	O
translation	O
layer	O
is	O
put	O
in	O
place	O
.	O
</s>
<s>
SPDY	B-Protocol
is	O
effectively	O
a	O
tunnel	O
for	O
the	O
HTTP	B-Protocol
and	O
HTTPS	B-Protocol
protocols	O
.	O
</s>
<s>
When	O
sent	O
over	O
SPDY	B-Protocol
,	O
HTTP	B-Protocol
requests	I-Protocol
are	O
processed	O
,	O
tokenized	O
,	O
simplified	O
and	O
compressed	O
.	O
</s>
<s>
For	O
example	O
,	O
each	O
SPDY	B-Protocol
endpoint	O
keeps	O
track	O
of	O
which	O
headers	O
have	O
been	O
sent	O
in	O
past	O
requests	O
and	O
can	O
avoid	O
resending	O
the	O
headers	O
that	O
have	O
not	O
changed	O
;	O
those	O
that	O
must	O
be	O
sent	O
are	O
compressed	O
.	O
</s>
<s>
For	O
use	O
within	O
HTTPS	B-Protocol
,	O
SPDY	B-Protocol
requires	O
the	O
TLS	B-Protocol
extension	O
Next	O
Protocol	O
Negotiation	O
(	O
NPN	O
)	O
or	O
Application-Layer	B-Protocol
Protocol	I-Protocol
Negotiation	I-Protocol
(	O
ALPN	B-Protocol
)	O
thus	O
browser	O
and	O
server	O
support	O
depends	O
on	O
the	O
HTTPS	B-Protocol
library	O
.	O
</s>
<s>
Patches	O
to	O
add	O
NPN	O
support	O
have	O
also	O
been	O
written	O
for	O
NSS	B-Protocol
and	O
TLSLite	O
.	O
</s>
<s>
Security	B-Protocol
Support	I-Protocol
Provider	I-Protocol
Interface	I-Protocol
(	O
SSPI	B-Protocol
)	O
from	O
Microsoft	O
have	O
not	O
implemented	O
the	O
NPN	O
extension	O
to	O
its	O
TLS	B-Protocol
implementation	O
.	O
</s>
<s>
This	O
has	O
prevented	O
SPDY	B-Protocol
inclusion	O
in	O
the	O
latest	O
.NET	O
Framework	O
versions	O
.	O
</s>
<s>
Since	O
SPDY	B-Protocol
specification	O
is	O
being	O
refined	O
and	O
HTTP/2	B-Protocol
is	O
expected	O
to	O
include	O
SPDY	B-Protocol
implementation	O
one	O
could	O
expect	O
Microsoft	O
to	O
release	O
support	O
after	O
HTTP/2	B-Protocol
is	O
finalized	O
.	O
</s>
<s>
Google	O
Chrome/Chromium	O
.	O
</s>
<s>
SPDY	B-Protocol
sessions	O
in	O
Chrome	B-Application
can	O
be	O
inspected	O
via	O
the	O
URI	B-Protocol
:	O
chrome://net-internals/	O
#events	O
&q	O
=	O
type:SPDY_SESSION	O
%	O
20is:active	O
.	O
</s>
<s>
There	O
is	O
a	O
command-line	O
switch	O
for	O
Google	B-Application
Chrome	I-Application
(	O
--enable-websocket-over-spdy	O
)	O
which	O
enables	O
an	O
early	O
,	O
experimental	O
implementation	O
of	O
WebSocket	B-Protocol
over	O
SPDY	B-Protocol
.	O
</s>
<s>
SPDY	B-Protocol
protocol	O
functionality	O
can	O
be	O
(	O
de	O
)	O
activated	O
by	O
toggling	O
"	O
Enable	O
SPDY/4	O
"	O
setting	O
on	O
local	O
chrome://flags	O
page	O
.	O
</s>
<s>
Chromium	B-Language
is	O
expected	O
to	O
remove	O
support	O
for	O
SPDY	B-Protocol
and	O
Next	O
Protocol	O
Negotiation	O
in	O
early	O
2016	O
,	O
in	O
favor	O
of	O
HTTP/2	B-Protocol
and	O
ALPN	B-Protocol
.	O
</s>
<s>
Starting	O
with	O
version	O
40.x	O
in	O
Feb	O
2015	O
Chrome	B-Application
has	O
already	O
dropped	O
support	O
for	O
SPDY/3	O
and	O
only	O
supports	O
SPDY/3.1	O
going	O
forward	O
.	O
</s>
<s>
This	O
has	O
caused	O
Apache	B-Application
websites	O
to	O
be	O
without	O
SPDY	B-Protocol
support	O
when	O
visited	O
from	O
Google	B-Application
Chrome	I-Application
.	O
</s>
<s>
Firefox	B-Application
supports	O
SPDY	B-Protocol
2	O
from	O
version	O
11	O
,	O
and	O
default-enabled	O
since	O
13	O
and	O
later	O
.	O
</s>
<s>
(	O
Also	O
SeaMonkey	B-Language
version	O
2.8	O
+	O
.	O
)	O
</s>
<s>
SPDY	B-Protocol
protocol	O
functionality	O
can	O
be	O
(	O
de	O
)	O
activated	O
by	O
toggling	O
the	O
variable	O
in	O
about:config	O
.	O
</s>
<s>
Firefox	B-Application
15	O
added	O
support	O
for	O
SPDY	B-Protocol
3	O
.	O
</s>
<s>
Firefox	B-Application
27	O
has	O
added	O
SPDY	B-Protocol
3.1	O
support	O
.	O
</s>
<s>
Firefox	B-Application
28	O
has	O
removed	O
support	O
of	O
SPDY	B-Protocol
2	O
.	O
about:networking	O
(	O
or	O
the	O
HTTP/2	B-Protocol
and	O
SPDY	B-Protocol
indicator	O
add-on	O
)	O
shows	O
if	O
a	O
website	O
uses	O
SPDY	B-Protocol
.	O
</s>
<s>
Opera	B-Application
browser	I-Application
added	O
support	O
for	O
SPDY	B-Protocol
as	O
of	O
version	O
12.10	O
.	O
</s>
<s>
Internet	B-Application
Explorer	I-Application
11	I-Application
added	O
support	O
for	O
SPDY	B-Protocol
version	O
3	O
,	O
but	O
not	O
for	O
the	O
Windows	O
7	O
version	O
.	O
</s>
<s>
A	O
problem	O
experienced	O
by	O
some	O
users	O
of	O
Windows	O
8.1	O
and	O
Internet	B-Application
Explorer	I-Application
11	I-Application
is	O
that	O
on	O
initial	O
loading	O
,	O
Google	B-Application
says	O
"	O
Page	O
not	O
found	O
"	O
but	O
on	O
reloading	O
,	O
it	O
is	O
fine	O
.	O
</s>
<s>
One	O
fix	O
for	O
this	O
is	O
to	O
disable	O
SPDY/3	O
in	O
Internet	O
Options	O
>	O
Advanced	O
.	O
</s>
<s>
After	O
version	O
11	O
,	O
IE	O
will	O
drop	O
the	O
support	O
of	O
SPDY	B-Protocol
,	O
as	O
it	O
will	O
adopt	O
HTTP/2	B-Protocol
.	O
</s>
<s>
Amazon	O
's	O
Silk	B-Protocol
browser	I-Protocol
for	O
the	O
Kindle	B-Application
Fire	I-Application
uses	O
the	O
SPDY	B-Protocol
protocol	O
to	O
communicate	O
with	O
their	O
EC2	B-General_Concept
service	O
for	O
Web	O
pages	O
rendering	O
.	O
</s>
<s>
Safari	B-Application
8	O
and	O
third-party	O
applications	O
in	O
OS	B-Device
X	I-Device
10.10	I-Device
and	O
iOS	B-Operating_System
8	I-Operating_System
adds	O
support	O
for	O
SPDY	B-Protocol
2	O
,	O
3	O
and	O
3.1	O
.	O
</s>
<s>
,	O
approximately	O
0.1	O
%	O
of	O
all	O
websites	O
support	O
SPDY	B-Protocol
,	O
in	O
part	O
due	O
to	O
transition	O
to	O
HTTP/2	B-Protocol
.	O
</s>
<s>
In	O
2016	O
,	O
NGINX	B-Operating_System
and	O
Apache	B-Application
were	O
the	O
major	O
providers	O
of	O
SPDY	B-Protocol
traffic	O
.	O
</s>
<s>
In	O
2015	O
,	O
NGINX	B-Operating_System
1.9.5	O
dropped	O
SPDY	B-Protocol
support	O
in	O
favor	O
of	O
HTTP/2	B-Protocol
.	O
</s>
<s>
Some	O
Google	B-Application
services	O
(	O
e.g.	O
</s>
<s>
Google	B-Application
Search	I-Application
,	O
Gmail	B-Application
,	O
and	O
other	O
SSL-enabled	O
services	O
)	O
use	O
SPDY	B-Protocol
when	O
available	O
.	O
</s>
<s>
Google	B-Application
's	I-Application
ads	O
are	O
also	O
served	O
from	O
SPDY-enabled	O
servers	O
.	O
</s>
<s>
A	O
brief	O
history	O
of	O
SPDY	B-Protocol
support	O
amongst	O
major	O
web	O
players	O
:	O
</s>
<s>
In	O
November	O
2009	O
,	O
Google	B-Application
announced	O
SPDY	B-Protocol
as	O
an	O
internal	O
project	O
to	O
increase	O
the	O
speed	O
of	O
the	O
web	O
.	O
</s>
<s>
In	O
September	O
2010	O
,	O
Google	B-Application
released	O
SPDY	B-Protocol
in	O
Chrome	B-Application
6	O
on	O
all	O
platforms	O
.	O
</s>
<s>
In	O
January	O
2011	O
,	O
Google	B-Application
deployed	O
SPDY	B-Protocol
across	O
all	O
Google	B-Application
services	O
.	O
</s>
<s>
In	O
March	O
2012	O
,	O
Twitter	B-Application
enabled	O
SPDY	B-Protocol
on	O
its	O
servers	O
,	O
at	O
the	O
time	O
making	O
it	O
the	O
second	O
largest	O
site	O
known	O
to	O
deploy	O
SPDY	B-Protocol
.	O
</s>
<s>
In	O
March	O
2012	O
,	O
the	O
open	O
source	O
Jetty	B-Language
Web	I-Language
Server	I-Language
announced	O
support	O
for	O
SPDY	B-Protocol
in	O
version	O
7.6.2	O
and	O
8.1.2	O
,	O
while	O
other	O
open	O
source	O
projects	O
were	O
working	O
on	O
implementing	O
support	O
for	O
SPDY	B-Protocol
,	O
including	O
Node.js	B-Language
,	O
Apache	B-Application
(	O
mod_spdy	O
)	O
,	O
curl	B-Language
,	O
and	O
Nginx	B-Operating_System
.	O
</s>
<s>
In	O
April	O
2012	O
Google	B-Application
started	O
providing	O
SPDY	B-Protocol
packages	O
for	O
Apache	B-Application
servers	I-Application
which	O
led	O
some	O
smaller	O
websites	O
to	O
provide	O
SPDY	B-Protocol
support	O
.	O
</s>
<s>
In	O
May	O
2012	O
F5	O
Networks	O
announced	O
support	O
for	O
SPDY	B-Protocol
in	O
its	O
BIG-IP	O
application	O
delivery	O
controllers	O
.	O
</s>
<s>
In	O
June	O
2012	O
Nginx	B-Operating_System
open	O
source	O
web	O
server	O
announced	O
support	O
for	O
SPDY	B-Protocol
.	O
</s>
<s>
In	O
July	O
2012	O
Facebook	B-Application
announced	O
implementation	O
plans	O
for	O
SPDY	B-Protocol
.	O
</s>
<s>
By	O
March	O
2013	O
SPDY	B-Protocol
was	O
implemented	O
by	O
some	O
of	O
their	O
public	O
web	O
servers	O
.	O
</s>
<s>
In	O
August	O
2012	O
WordPress.com	B-Protocol
announced	O
support	O
for	O
SPDY	B-Protocol
(	O
using	O
Nginx	B-Operating_System
)	O
across	O
all	O
their	O
hosted	O
blogs	O
.	O
</s>
<s>
In	O
June	O
2013	O
,	O
LiteSpeed	O
Technologies	O
announced	O
support	O
for	O
SPDY/2	O
and	O
SPDY/3	O
on	O
OpenLiteSpeed	O
,	O
their	O
open	O
source	O
HTTP	B-Protocol
server	O
.	O
</s>
<s>
Support	O
for	O
SPDY/3.1	O
was	O
announced	O
November	O
2013	O
.	O
</s>
<s>
In	O
January	O
2014	O
,	O
Synology	B-Operating_System
announced	O
SPDY	B-Protocol
is	O
included	O
in	O
the	O
new	O
DSM	O
5.0	O
.	O
</s>
<s>
In	O
February	O
2014	O
,	O
CloudFlare	B-Application
using	O
nginx	B-Operating_System
announced	O
automatic	O
support	O
for	O
SPDY	B-Protocol
v3.1	O
for	O
all	O
customers	O
with	O
SSL/TLS	B-Protocol
certificates	O
.	O
</s>
<s>
In	O
May	O
2014	O
,	O
MaxCDN	O
using	O
nginx	B-Operating_System
announced	O
support	O
for	O
SPDY	B-Protocol
v3.1	O
via	O
customers	O
 '	O
Pull	O
Zone	O
settings	O
and	O
their	O
API	O
.	O
</s>
<s>
In	O
May	O
2016	O
,	O
CloudFlare	B-Application
releases	O
patches	O
to	O
Nginx	B-Operating_System
web	O
server	O
,	O
the	O
patches	O
supports	O
HTTP/2	B-Protocol
and	O
SPDY	B-Protocol
simultaneously	O
.	O
</s>
<s>
According	O
to	O
W3Techs	O
,	O
,	O
most	O
SPDY-enabled	O
websites	O
use	O
nginx	B-Operating_System
,	O
with	O
the	O
LiteSpeed	O
web	O
server	O
coming	O
second	O
.	O
</s>
