<s>
Wire	B-Application
data	I-Application
is	O
the	O
information	O
that	O
passes	O
over	O
computer	O
and	O
telecommunication	O
networks	O
defining	O
communications	O
between	O
client	B-Operating_System
and	I-Operating_System
server	I-Operating_System
devices	O
.	O
</s>
<s>
It	O
is	O
the	O
result	O
of	O
decoding	O
wire	B-Protocol
and	I-Protocol
transport	I-Protocol
protocols	I-Protocol
containing	O
the	O
bi-directional	O
data	O
payload	O
.	O
</s>
<s>
More	O
precisely	O
,	O
wire	B-Application
data	I-Application
is	O
the	O
information	O
that	O
is	O
communicated	O
in	O
each	O
layer	O
of	O
the	O
OSI	O
model	O
(	O
Layer	O
1	O
not	O
being	O
included	O
because	O
those	O
protocols	O
are	O
used	O
to	O
establish	O
connections	O
and	O
do	O
not	O
communicate	O
information	O
)	O
.	O
</s>
<s>
Wire	B-Application
data	I-Application
is	O
the	O
observed	O
behavior	O
and	O
communication	O
between	O
networked	O
elements	O
which	O
is	O
an	O
important	O
source	O
of	O
information	O
used	O
by	O
IT	O
operations	O
staff	O
to	O
troubleshoot	O
performance	O
issues	O
,	O
create	O
activity	O
baselines	O
,	O
detect	O
anomalous	O
activity	O
,	O
investigate	O
security	O
incidents	O
,	O
and	O
discover	O
IT	O
assets	O
and	O
their	O
dependencies	O
.	O
</s>
<s>
According	O
to	O
a	O
March	O
2016	O
research	O
note	O
from	O
American	O
IT	O
research	O
and	O
advisory	O
firm	O
Gartner	O
,	O
wire	B-Application
data	I-Application
will	O
play	O
a	O
more	O
important	O
role	O
than	O
machine	O
data	O
for	O
analytics	O
in	O
the	O
future	O
:	O
"	O
While	O
log	O
data	O
will	O
certainly	O
have	O
a	O
role	O
in	O
future	O
monitoring	O
and	O
analytics	O
,	O
it	O
is	O
wire	B-Application
data	I-Application
—	O
radically	O
rethought	O
and	O
used	O
in	O
new	O
ways	O
—	O
that	O
will	O
prove	O
to	O
be	O
the	O
most	O
critical	O
source	O
of	O
data	O
for	O
availability	O
and	O
performance	O
management	O
over	O
the	O
next	O
five	O
years.	O
"	O
</s>
<s>
Real-time	O
wire	B-Application
data	I-Application
streams	O
are	O
also	O
important	O
sources	O
of	O
data	O
for	O
business	O
and	O
operational	O
intelligence	O
teams	O
.	O
</s>
<s>
In	O
these	O
types	O
of	O
scenarios	O
,	O
wire	B-Application
data	I-Application
is	O
used	O
to	O
measure	O
order	O
transactions	O
for	O
real-time	O
reporting	O
on	O
transaction	O
volume	O
,	O
success	O
,	O
and	O
failure	O
rates	O
;	O
tracking	O
patient	O
admission	O
rates	O
at	O
hospitals	O
;	O
as	O
well	O
as	O
reporting	O
on	O
the	O
weights	O
and	O
measures	O
of	O
airplanes	O
prior	O
to	O
take-off	O
.	O
</s>
<s>
Wire	B-Application
data	I-Application
is	O
distinct	O
from	O
machine-generated	B-General_Concept
data	I-General_Concept
,	O
which	O
is	O
system	O
self-reported	O
information	O
typically	O
in	O
the	O
form	O
of	O
logs	O
sourced	O
from	O
elements	O
like	O
network	O
routers	O
,	O
servers	O
,	O
and	O
other	O
equipment	O
.	O
</s>
<s>
Unlike	O
those	O
forms	O
of	O
machine-generated	B-General_Concept
data	I-General_Concept
,	O
which	O
are	O
dependent	O
on	O
the	O
logging	O
configurations	O
of	O
those	O
devices	O
,	O
wire	B-Application
data	I-Application
is	O
defined	O
by	O
wire	B-Protocol
and	I-Protocol
transport	I-Protocol
protocols	I-Protocol
.	O
</s>
<s>
There	O
is	O
a	O
small	O
amount	O
of	O
overlap	O
between	O
wire	B-Application
data	I-Application
and	O
machine-generated	B-General_Concept
data	I-General_Concept
but	O
also	O
significant	O
differences	O
.	O
</s>
<s>
For	O
example	O
,	O
web	O
server	O
logs	O
typically	O
record	O
HTTP	B-Protocol
status	I-Protocol
code	I-Protocol
200	I-Protocol
responses	O
,	O
indicating	O
that	O
a	O
web	O
page	O
was	O
served	O
to	O
a	O
client	O
.	O
</s>
<s>
However	O
,	O
web	O
servers	O
do	O
not	O
log	O
the	O
transaction	O
payload	O
and	O
so	O
would	O
not	O
be	O
able	O
to	O
show	O
which	O
HTTP	B-Protocol
status	I-Protocol
code	I-Protocol
200	I-Protocol
responses	O
were	O
for	O
pages	O
with	O
a	O
“	O
service	B-Protocol
unavailable	I-Protocol
”	O
message	O
.	O
</s>
<s>
That	O
information	O
is	O
contained	O
in	O
the	O
wire	B-Application
data	I-Application
or	O
transaction	O
payload	O
and	O
is	O
not	O
logged	O
by	O
the	O
server	O
.	O
</s>
<s>
Traditional	O
methods	O
of	O
capturing	O
and	O
analyzing	O
wire	B-Application
data	I-Application
include	O
offline	O
network	O
packet	O
analyzers	O
.	O
</s>
<s>
Newer	O
approaches	O
receive	O
a	O
copy	O
of	O
network	O
traffic	O
from	O
a	O
port	B-Protocol
mirror	I-Protocol
(	O
SPAN	O
)	O
or	O
network	O
tap	O
and	O
reassemble	O
those	O
packets	O
into	O
full	O
per-client	O
sessions	O
and	O
transaction	O
streams	O
,	O
analyzing	O
the	O
entire	O
transaction	O
payload	O
in	O
real	O
time	O
and	O
generating	O
metadata	O
on	O
those	O
transactions	O
without	O
storing	O
the	O
actual	O
packets	O
.	O
</s>
