<s>
A	O
grid	B-Protocol
network	I-Protocol
is	O
a	O
computer	B-Architecture
network	I-Architecture
consisting	O
of	O
a	O
number	O
of	O
computer	O
systems	O
connected	O
in	O
a	O
grid	O
topology	B-Architecture
.	O
</s>
<s>
In	O
a	O
regular	O
grid	O
topology	B-Architecture
,	O
each	O
node	O
in	O
the	O
network	O
is	O
connected	O
with	O
two	O
neighbors	O
along	O
one	O
or	O
more	O
dimensions	O
.	O
</s>
<s>
If	O
the	O
network	O
is	O
one-dimensional	O
,	O
and	O
the	O
chain	O
of	O
nodes	O
is	O
connected	O
to	O
form	O
a	O
circular	O
loop	O
,	O
the	O
resulting	O
topology	B-Architecture
is	O
known	O
as	O
a	O
ring	O
.	O
</s>
<s>
Network	O
systems	O
such	O
as	O
FDDI	B-Protocol
use	O
two	O
counter-rotating	O
token-passing	B-Protocol
rings	O
to	O
achieve	O
high	O
reliability	O
and	O
performance	O
.	O
</s>
<s>
In	O
general	O
,	O
when	O
an	O
n-dimensional	O
grid	B-Protocol
network	I-Protocol
is	O
connected	O
circularly	O
in	O
more	O
than	O
one	O
dimension	O
,	O
the	O
resulting	O
network	B-Architecture
topology	I-Architecture
is	O
a	O
torus	O
,	O
and	O
the	O
network	O
is	O
called	O
"	O
toroidal	O
"	O
.	O
</s>
<s>
a	O
hypercube	B-Operating_System
.	O
</s>
<s>
a	O
hypercube	B-Operating_System
graph	O
,	O
</s>
<s>
a	O
hypertree	B-Protocol
network	I-Protocol
,	O
</s>
<s>
a	O
fat	B-Protocol
tree	I-Protocol
network	O
,	O
</s>
<s>
A	O
grid	B-Protocol
network	I-Protocol
is	O
not	O
the	O
same	O
as	O
a	O
grid	O
computer	O
or	O
a	O
computational	B-Architecture
grid	I-Architecture
,	O
although	O
the	O
nodes	O
in	O
a	O
grid	B-Protocol
network	I-Protocol
are	O
usually	O
computers	O
,	O
and	O
grid	B-Architecture
computing	I-Architecture
requires	O
some	O
kind	O
of	O
computer	B-Architecture
network	I-Architecture
or	O
"	O
universal	O
coding	O
"	O
to	O
interconnect	O
the	O
computers	O
.	O
</s>
