<s>
Network	B-Protocol
Virtualization	I-Protocol
using	I-Protocol
Generic	I-Protocol
Routing	I-Protocol
Encapsulation	I-Protocol
(	O
NVGRE	B-Protocol
)	O
is	O
a	O
network	B-Protocol
virtualization	I-Protocol
technology	O
that	O
attempts	O
to	O
alleviate	O
the	O
scalability	B-Architecture
problems	O
associated	O
with	O
large	O
cloud	B-Architecture
computing	I-Architecture
deployments	O
.	O
</s>
<s>
It	O
uses	O
Generic	B-Protocol
Routing	I-Protocol
Encapsulation	I-Protocol
(	O
GRE	O
)	O
to	O
tunnel	O
layer	B-Protocol
2	I-Protocol
packets	O
over	O
layer	B-Application
3	I-Application
networks	O
.	O
</s>
