<s>
A	O
communication	B-Protocol
endpoint	I-Protocol
is	O
a	O
type	O
of	O
communication	B-Protocol
network	I-Protocol
node	I-Protocol
.	O
</s>
<s>
An	O
example	O
of	O
the	O
latter	O
type	O
of	O
a	O
communication	B-Protocol
endpoint	I-Protocol
is	O
a	O
publish-subscribe	B-Operating_System
topic	O
or	O
a	O
group	O
in	O
group	B-Operating_System
communication	I-Operating_System
systems	I-Operating_System
.	O
</s>
