<s>
The	O
Serial	B-Protocol
Line	I-Protocol
Internet	I-Protocol
Protocol	I-Protocol
(	O
SLIP	O
)	O
is	O
an	O
encapsulation	B-Protocol
of	O
the	O
Internet	B-Protocol
Protocol	I-Protocol
designed	O
to	O
work	O
over	O
serial	B-Protocol
ports	I-Protocol
and	O
router	B-Protocol
connections	O
.	O
</s>
<s>
On	O
personal	O
computers	O
,	O
SLIP	O
has	O
largely	O
been	O
replaced	O
by	O
the	O
Point-to-Point	B-Protocol
Protocol	I-Protocol
(	O
PPP	O
)	O
,	O
which	O
is	O
better	O
engineered	O
,	O
has	O
more	O
features	O
,	O
and	O
does	O
not	O
require	O
its	O
IP	O
address	O
configuration	B-General_Concept
to	O
be	O
set	O
before	O
it	O
is	O
established	O
.	O
</s>
<s>
On	O
microcontrollers	B-Architecture
,	O
however	O
,	O
SLIP	O
is	O
still	O
the	O
preferred	O
way	O
of	O
encapsulating	O
IP	B-Protocol
packets	I-Protocol
,	O
due	O
to	O
its	O
very	O
small	O
overhead	O
.	O
</s>
<s>
Some	O
people	O
refer	O
to	O
the	O
successful	O
and	O
widely	O
used	O
Serial	B-Protocol
Line	I-Protocol
Internet	I-Protocol
Protocol	I-Protocol
as	O
"	O
Rick	O
Adams	O
 '	O
SLIP	O
"	O
,	O
to	O
avoid	O
confusion	O
with	O
other	O
proposed	O
protocols	O
named	O
"	O
SLIP	O
"	O
.	O
</s>
<s>
Those	O
other	O
protocols	O
include	O
the	O
much	O
more	O
complicated	O
appendix	O
D	O
Serial	B-Protocol
Line	I-Protocol
Interface	O
Protocol	O
.	O
</s>
<s>
SLIP	O
modifies	O
a	O
standard	O
TCP/IP	B-Protocol
datagram	B-Protocol
by	O
:	O
</s>
<s>
appending	O
a	O
special	O
"	O
END	O
"	O
byte	B-Application
to	O
it	O
,	O
which	O
distinguishes	O
datagram	B-Protocol
boundaries	O
in	O
the	O
byte	B-Application
stream	O
,	O
</s>
<s>
if	O
the	O
END	O
byte	B-Application
occurs	O
in	O
the	O
data	O
to	O
be	O
sent	O
,	O
the	O
two	O
byte	B-Application
sequence	O
ESC	O
,	O
ESC_END	O
is	O
sent	O
instead	O
,	O
</s>
<s>
if	O
the	O
ESC	O
byte	B-Application
occurs	O
in	O
the	O
data	O
,	O
the	O
two	O
byte	B-Application
sequence	O
ESC	O
,	O
ESC_ESC	O
is	O
sent	O
.	O
</s>
<s>
SLIP	O
requires	O
a	O
serial	B-Protocol
port	I-Protocol
configuration	B-General_Concept
of	O
8	O
data	O
bits	O
,	O
no	O
parity	B-Error_Name
,	O
and	O
either	O
EIA	O
hardware	O
flow	O
control	O
,	O
or	O
CLOCAL	O
mode	O
(	O
3-wire	O
null-modem	O
)	O
UART	O
operation	O
settings	O
.	O
</s>
<s>
SLIP	O
does	O
not	O
provide	O
error	B-Error_Name
detection	I-Error_Name
,	O
being	O
reliant	O
on	O
upper	B-Protocol
layer	I-Protocol
protocols	I-Protocol
for	O
this	O
.	O
</s>
<s>
It	O
is	O
however	O
still	O
useful	O
for	O
testing	O
operating	B-General_Concept
systems	I-General_Concept
 '	O
response	O
capabilities	O
under	O
load	O
(	O
by	O
looking	O
at	O
flood-ping	O
statistics	O
)	O
.	O
</s>
<s>
SLIP	O
escape	O
characters	O
were	O
also	O
required	O
on	O
some	O
modem	O
connections	O
to	O
escape	O
Hayes	B-Device
command	I-Device
set	I-Device
,	O
allowing	O
therefore	O
to	O
pass	O
binary	O
data	O
through	O
those	O
modems	O
that	O
would	O
recognize	O
some	O
characters	O
as	O
commands	O
.	O
</s>
<s>
A	O
version	O
of	O
SLIP	O
with	O
header	B-General_Concept
compression	B-General_Concept
is	O
called	O
Compressed	B-Protocol
SLIP	I-Protocol
(	O
CSLIP	B-Protocol
)	O
.	O
</s>
<s>
The	O
compression	B-General_Concept
algorithm	I-General_Concept
used	O
in	O
CSLIP	B-Protocol
is	O
known	O
as	O
Van	B-Protocol
Jacobson	I-Protocol
TCP/IP	I-Protocol
Header	I-Protocol
Compression	I-Protocol
.	O
</s>
<s>
CSLIP	B-Protocol
has	O
no	O
effect	O
on	O
the	O
data	O
payload	O
of	O
a	O
packet	O
and	O
is	O
independent	O
of	O
any	O
compression	B-General_Concept
by	O
the	O
serial	B-Protocol
line	I-Protocol
modem	O
used	O
for	O
transmission	O
.	O
</s>
<s>
It	O
reduces	O
the	O
Transmission	B-Protocol
Control	I-Protocol
Protocol	I-Protocol
(	O
TCP	O
)	O
header	B-General_Concept
from	O
twenty	O
bytes	B-Application
to	O
seven	O
bytes	B-Application
.	O
</s>
<s>
CSLIP	B-Protocol
has	O
no	O
effect	O
on	O
User	B-Protocol
Datagram	I-Protocol
Protocol	I-Protocol
(	O
UDP	O
)	O
datagrams	B-Protocol
.	O
</s>
