<s>
Frenetic	B-Application
is	O
a	O
domain-specific	B-Language
language	I-Language
for	O
programming	O
software-defined	O
networks	O
(	O
SDNs	O
)	O
.	O
</s>
<s>
This	O
domain-specific	B-Language
programming	I-Language
language	I-Language
allows	O
network	O
operators	O
,	O
rather	O
than	O
manually	O
configuring	O
each	O
connected	O
network	O
device	O
,	O
to	O
program	O
the	O
network	O
as	O
a	O
whole	O
.	O
</s>
<s>
Frenetic	B-Application
is	O
designed	O
to	O
solve	O
major	O
OpenFlow/NOX	O
programming	O
problems	O
.	O
</s>
<s>
In	O
particular	O
,	O
Frenetic	B-Application
introduces	O
a	O
set	O
of	O
purely	O
functional	O
abstractions	O
that	O
enable	O
modular	B-Architecture
program	I-Architecture
development	I-Architecture
,	O
defines	O
high-level	O
,	O
programmer-centric	O
packet-processing	O
operators	O
,	O
and	O
eliminates	O
many	O
of	O
the	O
difficulties	O
of	O
the	O
two-tier	O
programming	O
model	O
by	O
introducing	O
a	O
see-every-packet	O
programming	O
paradigm	O
.	O
</s>
<s>
Hence	O
Frenetic	B-Application
is	O
a	O
functional	B-Application
reactive	I-Application
programming	I-Application
language	O
operating	O
at	O
a	O
packet	B-Protocol
level	O
of	O
abstraction	O
.	O
</s>
