<s>
In	O
contrast	O
to	O
IP-based	O
,	O
host-oriented	O
,	O
Internet	O
architecture	O
,	O
Content-Centric	B-Protocol
Networking	I-Protocol
(	O
CCN	O
)	O
emphasizes	O
content	O
by	O
making	O
it	O
directly	O
addressable	O
and	O
routable	O
.	O
</s>
<s>
It	O
is	O
considered	O
an	O
information-centric	B-Protocol
networking	I-Protocol
(	O
ICN	O
)	O
architecture	O
.	O
</s>
<s>
The	O
first	O
software	O
release	O
(	O
CCNx	B-Protocol
0.1	O
)	O
was	O
made	O
available	O
in	O
2009	O
.	O
</s>
<s>
CCN	O
is	O
the	O
ancestor	O
of	O
related	O
approaches	O
,	O
including	O
named	B-Protocol
data	I-Protocol
networking	I-Protocol
.	O
</s>
<s>
The	O
principles	O
behind	O
information-centric	O
networks	O
were	O
first	O
described	O
in	O
the	O
original	O
17	O
rules	O
of	O
Ted	O
Nelson	O
's	O
Project	B-Protocol
Xanadu	I-Protocol
in	O
1979	O
.	O
</s>
<s>
In	O
2009	O
,	O
PARC	O
announced	O
the	O
CCNx	B-Protocol
project	O
(	O
Content-Centric	O
Network	O
)	O
,	O
publishing	O
the	O
interoperability	O
specifications	O
and	O
an	O
open-source	O
implementation	O
on	O
the	O
on	O
September	O
21	O
,	O
2009	O
.	O
</s>
<s>
Annual	O
CCNx	B-Protocol
Community	O
meetings	O
were	O
held	O
in	O
2011	O
,	O
2012	O
,	O
2013	O
and	O
2015	O
.	O
</s>
<s>
The	O
for	O
CCNx	B-Protocol
1.0	O
has	O
been	O
made	O
available	O
for	O
comment	O
and	O
discussion	O
.	O
</s>
<s>
Work	O
on	O
CCNx	B-Protocol
happens	O
openly	O
in	O
the	O
IRTF	O
research	O
group	O
.	O
</s>
<s>
The	O
CCNx	B-Protocol
specification	O
was	O
published	O
in	O
some	O
IETF	O
drafts	O
.	O
</s>
<s>
Seamless	O
data	O
integration	O
within	O
an	O
open-run	O
environment	O
was	O
proposed	O
as	O
a	O
major	O
contributing	O
factor	O
in	O
protecting	O
the	O
security	O
of	O
cloud-based	B-Architecture
analytics	I-Architecture
and	O
key	O
network	O
encryption	O
.	O
</s>
<s>
The	O
CCNx	B-Protocol
software	O
was	O
available	O
on	O
GitHub	B-Application
.	O
</s>
<s>
The	B-Operating_System
Internet	I-Operating_System
of	I-Operating_System
Things	I-Operating_System
(	O
IoT	B-Operating_System
)	O
and	O
sensor	O
networks	O
are	O
environments	O
where	O
the	O
source-destination	O
communication	O
model	O
does	O
n't	O
always	O
provide	O
the	O
best	O
solution	O
.	O
</s>
<s>
The	O
network	O
routes	O
the	O
interest	O
based	O
on	O
the	O
name	O
using	O
longest	B-Protocol
prefix	I-Protocol
match	I-Protocol
.	O
</s>
<s>
CCNx	B-Protocol
1.x	O
differs	O
from	O
CCNx	B-Protocol
0.x	O
in	O
the	O
following	O
ways	O
:	O
</s>
<s>
A	O
nested	O
type	B-Protocol
–	I-Protocol
length	I-Protocol
–	I-Protocol
value	I-Protocol
(	O
TLV	O
)	O
format	O
is	O
used	O
to	O
encode	O
all	O
messages	O
on	O
the	O
wire	O
.	O
</s>
<s>
The	O
specification	O
of	O
CCNx	B-Protocol
1.0	O
is	O
available	O
at	O
:	O
</s>
<s>
Named	B-Protocol
data	I-Protocol
networking	I-Protocol
is	O
an	O
NSF	O
funded	O
project	O
based	O
on	O
the	O
original	O
CCNx	B-Protocol
0.x	O
code	O
.	O
</s>
<s>
is	O
a	O
lightweight	O
version	O
of	O
CCNx	B-Protocol
functionally	O
interoperable	O
with	O
CCN	O
0.x	O
.	O
</s>
<s>
is	O
a	O
project	O
focused	O
on	O
disaster	O
recovery	O
scenarios	O
using	O
an	O
Information	B-Protocol
Centric	I-Protocol
Networking	I-Protocol
paradigm	O
.	O
</s>
