<s>
OMNeT++	B-Application
(	O
Objective	O
Modular	O
Network	O
Testbed	O
in	O
C++	B-Language
)	O
is	O
a	O
modular	O
,	O
component-based	O
C++	B-Language
simulation	O
library	O
and	O
framework	O
,	O
primarily	O
for	O
building	O
network	O
simulators	O
.	O
</s>
<s>
OMNeT++	B-Application
can	O
be	O
used	O
for	O
free	O
for	O
non-commercial	O
simulations	O
like	O
at	O
academic	O
institutions	O
and	O
for	O
teaching	O
.	O
</s>
<s>
OMNEST	O
is	O
an	O
extended	O
version	O
of	O
OMNeT++	B-Application
for	O
commercial	O
use	O
.	O
</s>
<s>
OMNeT++	B-Application
itself	O
is	O
a	O
simulation	O
framework	O
without	O
models	O
for	O
network	O
protocols	O
like	O
IP	B-Protocol
or	O
HTTP	B-Protocol
.	I-Protocol
</s>
<s>
The	O
most	O
commonly	O
used	O
one	O
is	O
INET	O
which	O
offers	O
a	O
variety	O
of	O
models	O
for	O
all	O
kind	O
of	O
network	O
protocols	O
and	O
technologies	O
like	O
for	O
IPv6	B-Protocol
,	O
BGP	B-Protocol
.	O
</s>
<s>
The	O
INET	O
models	O
are	O
licensed	O
under	O
the	O
LGPL	B-Application
or	O
GPL	B-License
.	O
</s>
<s>
NED	O
(	O
NEtwork	O
Description	O
)	O
is	O
the	O
topology	O
description	O
language	O
of	O
OMNeT++	B-Application
.	O
</s>
<s>
To	O
manage	O
and	O
reduce	O
the	O
time	O
to	O
carry	O
out	O
large-scale	O
simulations	O
,	O
additional	O
tools	O
have	O
been	O
developed	O
,	O
for	O
example	O
,	O
based	O
on	O
Python	B-Language
.	O
</s>
