<s>
KISS	O
(	O
Keep	O
It	O
Simple	O
,	O
Stupid	O
)	O
is	O
a	O
protocol	O
for	O
communicating	O
with	O
a	O
serial	O
terminal	B-Protocol
node	I-Protocol
controller	I-Protocol
(	O
TNC	O
)	O
device	O
used	O
for	O
amateur	O
radio	O
.	O
</s>
<s>
KISS	O
was	O
developed	O
by	O
Mike	O
Cheponis	O
and	O
Phil	O
Karn	O
to	O
allow	O
transmission	O
of	O
AX.25	B-Protocol
packet	O
radio	O
frames	O
containing	O
IP	O
packets	O
over	O
an	O
asynchronous	O
serial	O
link	O
,	O
for	O
use	O
with	O
the	O
KA9Q	B-Protocol
NOS	I-Protocol
program	O
.	O
</s>
<s>
The	O
KISS	O
protocol	O
is	O
designed	O
to	O
be	O
easy	O
to	O
implement	O
in	O
simple	O
embedded	B-Architecture
devices	I-Architecture
,	O
which	O
are	O
capable	O
of	O
asynchronous	O
serial	O
communications	O
.	O
</s>
<s>
While	O
it	O
allows	O
arbitrary	O
data	O
to	O
be	O
transferred	O
,	O
there	O
is	O
no	O
support	O
for	O
flow	O
control	O
or	O
error	B-Error_Name
handling	I-Error_Name
.	O
</s>
<s>
KISS	O
uses	O
Serial	B-Protocol
Line	I-Protocol
Internet	I-Protocol
Protocol	I-Protocol
framing	O
,	O
but	O
defines	O
its	O
own	O
simple	O
protocol	O
instead	O
of	O
encapsulating	O
raw	O
IP	O
packets	O
,	O
as	O
SLIP	O
does	O
.	O
</s>
<s>
The	O
KISS	O
protocol	B-Protocol
messages	I-Protocol
provide	O
for	O
setting	O
common	O
TNC	O
control	O
variables	O
as	O
well	O
as	O
sending	O
arbitrary	O
message	O
packets	O
to	O
be	O
forwarded	O
by	O
the	O
TNC	O
.	O
</s>
<s>
While	O
the	O
packets	O
may	O
be	O
arbitrary	O
,	O
protocols	O
commonly	O
used	O
with	O
KISS	O
include	O
AX.25	B-Protocol
and	O
IPv4	B-Protocol
.	O
</s>
