<s>
The	O
domain	O
names	O
example.com,	O
example.net,	O
example.org,	O
and	O
example.edu	O
are	O
second-level	B-Protocol
domain	I-Protocol
names	O
in	O
the	O
Domain	B-Protocol
Name	I-Protocol
System	I-Protocol
of	O
the	O
Internet	O
.	O
</s>
<s>
The	O
Internet	B-Application
Corporation	I-Application
for	I-Application
Assigned	I-Application
Names	I-Application
and	I-Application
Numbers	I-Application
(	O
ICANN	B-Application
)	O
operates	O
web	O
sites	O
for	O
these	O
domains	O
with	O
content	O
that	O
reflects	O
their	O
purpose	O
.	O
</s>
<s>
The	O
domains	O
example.com,	O
example.net,	O
example.org,	O
and	O
example.edu	O
are	O
intended	O
for	O
general	O
use	O
in	O
any	O
kind	O
of	O
documentation	O
,	O
such	O
as	O
technical	O
and	O
software	O
documentation	O
,	O
manuals	O
,	O
and	O
sample	O
software	O
configurations	O
.	O
</s>
<s>
The	O
domains	O
may	O
be	O
used	O
in	O
documentation	O
without	O
prior	O
consultation	O
with	O
IANA	O
or	O
ICANN	B-Application
.	O
</s>
<s>
In	O
practice	O
,	O
these	O
domain	O
names	O
are	O
also	O
installed	O
in	O
the	O
Domain	B-Protocol
Name	I-Protocol
System	I-Protocol
with	O
the	O
Internet	B-Protocol
Protocol	I-Protocol
(	O
IP	O
)	O
addresses	O
for	O
Internet	B-Protocol
Protocol	I-Protocol
version	I-Protocol
4	I-Protocol
(	O
IPv4	B-Protocol
)	O
and	O
IPv6	B-Protocol
of	O
a	O
web	B-Application
server	I-Application
managed	O
by	O
ICANN	B-Application
.	O
</s>
<s>
The	O
domains	O
are	O
digitally	O
signed	O
using	O
Domain	B-Protocol
Name	I-Protocol
System	I-Protocol
Security	I-Protocol
Extensions	I-Protocol
(	O
DNSSEC	B-Protocol
)	O
.	O
</s>
<s>
The	O
zone	O
files	O
of	O
each	O
domain	O
also	O
define	O
one	O
subdomain	B-Protocol
name	O
.	O
</s>
<s>
The	O
third-level	B-Protocol
domain	I-Protocol
name	O
www	O
resolves	O
to	O
the	O
IP	O
addresses	O
of	O
the	O
parent	O
domains	O
.	O
</s>
<s>
The	O
second-level	B-Protocol
domain	I-Protocol
label	O
example	O
for	O
the	O
top-level	O
domains	O
com	O
,	O
net	B-Application
,	O
and	O
org	O
have	O
been	O
reserved	O
and	O
registered	O
since	O
at	O
least	O
1992	O
.	O
</s>
<s>
The	O
reservation	O
for	O
the	O
educational	O
domain	O
edu	O
was	O
sponsored	O
by	O
the	O
Internet	B-Application
Corporation	I-Application
for	I-Application
Assigned	I-Application
Names	I-Application
and	I-Application
Numbers	I-Application
(	O
ICANN	B-Application
)	O
in	O
2000	O
.	O
</s>
