<s>
This	O
is	O
a	O
list	O
of	O
notable	O
managed	O
DNS	B-Protocol
providers	O
in	O
a	O
comparison	O
table	O
.	O
</s>
<s>
A	O
managed	O
DNS	B-Protocol
provider	O
offers	O
either	O
a	O
web-based	O
control	O
panel	O
or	O
downloadable	O
software	O
that	O
allows	O
users	O
to	O
manage	O
their	O
DNS	B-Protocol
traffic	O
via	O
specified	O
protocols	O
such	O
as	O
:	O
DNS	B-Protocol
Failover	B-General_Concept
,	O
Dynamic	O
IP	B-Protocol
addresses	O
,	O
SMTP	O
Authentication	O
,	O
and	O
GeoDNS	B-Protocol
.	O
</s>
