<s>
IPv6-to-IPv6	B-Protocol
Network	I-Protocol
Prefix	I-Protocol
Translation	I-Protocol
(	O
NPTv6	B-Protocol
)	O
is	O
a	O
specification	O
for	O
IPv6	B-Protocol
to	O
achieve	O
address-independence	O
at	O
the	O
network	O
edge	O
,	O
similar	O
to	O
network	B-Protocol
address	I-Protocol
translation	I-Protocol
(	O
NAT	O
)	O
in	O
Internet	B-Protocol
Protocol	I-Protocol
version	I-Protocol
4	I-Protocol
(	O
IPv4	B-Protocol
)	O
.	O
</s>
<s>
It	O
has	O
fewer	O
architectural	O
problems	O
than	O
traditional	O
IPv4	B-Protocol
NAT	O
;	O
for	O
example	O
,	O
it	O
is	O
stateless	B-Protocol
and	O
preserves	O
the	O
reachability	O
attributed	O
to	O
the	O
end-to-end	B-Application
principle	I-Application
.	O
</s>
<s>
However	O
,	O
the	O
method	O
may	O
not	O
translate	O
embedded	O
IPv6	B-Protocol
addresses	O
properly	O
(	O
IPsec	B-Protocol
can	O
be	O
impacted	O
)	O
,	O
and	O
split-horizon	B-Protocol
DNS	I-Protocol
may	O
be	O
required	O
for	O
use	O
in	O
a	O
business	O
environment	O
.	O
</s>
<s>
NPTv6	B-Protocol
differs	O
from	O
NAT66	B-Protocol
,	O
which	O
is	O
stateful	O
.	O
</s>
<s>
With	O
NPTv6	B-Protocol
,	O
no	O
port	O
translation	O
is	O
required	O
nor	O
other	O
manipulation	O
of	O
transport	O
characteristics	O
.	O
</s>
<s>
Compared	O
to	O
NAT66	B-Protocol
,	O
with	O
NPTv6	B-Protocol
there	O
is	O
end-to-end	O
reachability	O
along	O
with	O
1:1	O
address	O
mapping	O
.	O
</s>
<s>
This	O
makes	O
NPTv6	B-Protocol
a	O
better	O
choice	O
than	O
NAT66	B-Protocol
.	O
</s>
