<s>
mcast.net	B-Protocol
is	O
a	O
second	B-Protocol
level	I-Protocol
domain	I-Protocol
reserved	O
by	O
the	O
Internet	O
Assigned	O
Numbers	O
Authority	O
(	O
IANA	O
)	O
and	O
maintained	O
by	O
Verisign	B-Application
used	O
to	O
bind	O
DNS	O
records	O
unique	O
to	O
multicast	O
addressing	O
.	O
</s>
<s>
Examples	O
of	O
multicast	O
address	O
definitions	O
in	O
the	O
domain	O
mcast.net	B-Protocol
are	O
:	O
</s>
