<s>
A	O
dynamic	B-Protocol
circuit	I-Protocol
network	I-Protocol
(	O
DCN	O
)	O
is	O
an	O
advanced	O
computer	B-Architecture
networking	I-Architecture
technology	O
that	O
combines	O
traditional	O
packet-switched	B-Protocol
communication	O
based	O
on	O
the	O
Internet	B-Protocol
Protocol	I-Protocol
,	O
as	O
used	O
in	O
the	O
Internet	O
,	O
with	O
circuit-switched	B-Protocol
technologies	O
that	O
are	O
characteristic	O
of	O
traditional	O
telephone	O
network	O
systems	O
.	O
</s>
<s>
This	O
combination	O
allows	O
user-initiated	O
ad	O
hoc	O
dedicated	O
allocation	O
of	O
network	O
bandwidth	O
for	O
high-demand	O
,	O
real-time	O
applications	O
and	O
network	O
services	O
,	O
delivered	O
over	O
an	O
optical	B-Architecture
fiber	I-Architecture
infrastructure	O
.	O
</s>
<s>
Dynamic	B-Protocol
circuit	I-Protocol
networks	I-Protocol
were	O
pioneered	O
by	O
the	O
Internet2	O
advanced	O
networking	O
consortium	O
.	O
</s>
<s>
The	O
experimental	O
Internet2	O
HOPI	O
infrastructure	O
,	O
decommissioned	O
in	O
2007	O
,	O
was	O
a	O
forerunner	O
to	O
the	O
current	O
SONET-based	O
Ciena	O
Network	O
underlying	O
the	O
Internet2	O
DCN	O
.	O
</s>
<s>
The	O
entire	O
software	O
set	O
is	O
known	O
as	O
the	O
Dynamic	B-Protocol
Circuit	I-Protocol
Network	I-Protocol
Software	O
Suite	O
(	O
DCN	O
SS	O
)	O
.	O
</s>
<s>
The	O
Inter-domain	O
Controller	O
protocol	O
manages	O
the	O
dynamic	O
provisioning	O
of	O
network	O
resources	O
participating	O
in	O
a	O
dynamic	B-Protocol
circuit	I-Protocol
network	I-Protocol
across	O
multiple	O
administrative	O
domain	O
boundaries	O
.	O
</s>
<s>
It	O
is	O
a	O
SOAP-based	O
XML	B-Protocol
messaging	O
protocol	O
,	O
secured	O
by	O
Web	O
Services	O
Security	O
(	O
v1.1	O
)	O
using	O
the	O
XML	B-Protocol
Digital	O
Signature	O
standard	O
.	O
</s>
<s>
It	O
is	O
transported	O
over	O
HTTP	B-Protocol
Secure	I-Protocol
(	O
HTTPS	B-Protocol
)	O
connections	O
.	O
</s>
