<s>
GeoDNS	B-Protocol
(	O
or	O
GeoIP	O
)	O
is	O
a	O
patch	O
for	O
BIND	B-Protocol
DNS	B-Protocol
server	O
software	O
,	O
to	O
allow	O
geographical	O
split	O
horizon	O
(	O
different	O
DNS	B-Protocol
answers	O
based	O
on	O
client	O
's	O
geographical	O
location	O
)	O
,	O
based	O
on	O
MaxMind	O
's	O
geoip	O
(	O
commercial	O
)	O
or	O
geolite	O
(	O
free	O
)	O
databases	O
.	O
</s>
<s>
The	O
objective	O
of	O
this	O
technology	O
is	O
to	O
enhance	O
the	O
domain	B-Protocol
name	I-Protocol
lookup	I-Protocol
by	O
address	O
resolution	O
based	O
on	O
geographical	O
location	O
of	O
the	O
client	O
.	O
</s>
<s>
With	O
GeoDNS	B-Protocol
it	O
's	O
possible	O
to	O
create	O
a	O
DNS	B-Protocol
record	O
for	O
which	O
clients	O
from	O
Europe	O
would	O
get	O
IP	O
address	O
of	O
French	O
server	O
and	O
clients	O
from	O
US	O
would	O
get	O
the	O
American	O
one	O
.	O
</s>
<s>
This	O
makes	O
network	O
access	O
faster	O
and	O
possibly	O
cheaper	O
,	O
compared	O
to	O
directing	O
all	O
users	O
worldwide	O
to	O
the	O
same	O
server	O
or	O
to	O
multiple	O
servers	O
using	O
random	O
distribution	O
,	O
such	O
as	O
round	B-Protocol
robin	I-Protocol
.	O
</s>
<s>
As	O
this	O
technology	O
is	O
DNS	B-Protocol
based	O
,	O
it	O
is	O
much	O
easier	O
to	O
deploy	O
than	O
BGP	O
anycast	O
.	O
</s>
<s>
The	O
requester	O
that	O
the	O
resolving	O
DNS	B-Protocol
server	O
sees	O
is	O
typically	O
not	O
the	O
end	O
user	O
,	O
but	O
the	O
DNS	B-Protocol
server	O
of	O
the	O
user	O
's	O
ISP	O
doing	O
a	O
recursive	O
lookup	O
,	O
and	O
the	O
recursive	O
DNS	B-Protocol
server	O
caches	O
the	O
result	O
.	O
</s>
<s>
As	O
ISPs	O
typically	O
arrange	O
for	O
users	O
to	O
use	O
DNS	B-Protocol
servers	O
geographically	O
near	O
them	O
,	O
the	O
system	O
usually	O
works	O
nonetheless	O
.	O
</s>
