<s>
For	O
networking	B-Architecture
,	O
the	O
Internet	B-Protocol
Protocol	I-Protocol
IP	B-Protocol
Payload	I-Protocol
Compression	I-Protocol
Protocol	I-Protocol
,	O
or	O
IPComp	B-Protocol
,	O
is	O
a	O
low	O
level	O
compression	O
protocol	O
for	O
IP	B-Protocol
datagrams	B-Protocol
defined	O
in	O
RFC	O
3173	O
.	O
</s>
<s>
According	O
to	O
the	O
RFC	O
requirements	O
,	O
compression	O
must	O
be	O
done	O
before	O
fragmenting	B-Protocol
or	O
encrypting	O
the	O
packet	O
.	O
</s>
<s>
It	O
further	O
states	O
that	O
each	O
datagram	B-Protocol
must	O
be	O
compressed	O
independently	O
so	O
it	O
can	O
be	O
decompressed	O
even	O
if	O
received	O
out	O
of	O
order	O
.	O
</s>
<s>
This	O
is	O
important	O
because	O
it	O
allows	O
IPComp	B-Protocol
to	O
work	O
with	O
both	O
TCP	B-Protocol
and	O
UDP	B-Protocol
network	O
communications	O
.	O
</s>
