<s>
In	O
computer	B-Architecture
networking	I-Architecture
,	O
a	O
peer	B-Protocol
group	I-Protocol
is	O
a	O
group	O
of	O
functional	O
units	O
in	O
the	O
same	O
layer	O
(	O
see	O
e.g.	O
</s>
<s>
OSI	O
model	O
)	O
of	O
a	O
network	O
,	O
by	O
analogy	O
with	O
peer	B-Protocol
group	I-Protocol
.	O
</s>
