<s>
Source	B-General_Concept
route	I-General_Concept
bridging	I-General_Concept
is	O
used	O
on	O
Token	B-Device
Ring	I-Device
networks	I-Device
,	O
and	O
is	O
standardized	O
in	O
Section	O
9	O
of	O
the	O
IEEE	O
802.2	O
standard	O
.	O
</s>
<s>
The	O
operation	O
of	O
the	O
bridge	O
is	O
simpler	O
(	O
spanning	B-Protocol
tree	I-Protocol
protocol	I-Protocol
is	O
not	O
necessary	O
)	O
and	O
much	O
of	O
the	O
bridging	O
functions	O
are	O
performed	O
by	O
the	O
end	O
systems	O
,	O
particularly	O
the	O
sources	O
,	O
giving	O
rise	O
to	O
its	O
name	O
.	O
</s>
<s>
Source-route	O
transparent	O
bridging	O
,	O
abbreviated	O
SRT	O
bridging	O
,	O
is	O
a	O
hybrid	O
of	O
source	B-Protocol
routing	I-Protocol
and	O
transparent	O
bridging	O
,	O
standardized	O
in	O
Section	O
9	O
of	O
the	O
IEEE	O
802.2	O
standard	O
.	O
</s>
<s>
It	O
allows	O
source	B-Protocol
routing	I-Protocol
and	O
transparent	O
bridging	O
to	O
coexist	O
on	O
the	O
same	O
bridged	O
network	O
by	O
using	O
source	B-Protocol
routing	I-Protocol
with	O
hosts	O
that	O
support	O
it	O
and	O
transparent	O
bridging	O
otherwise	O
.	O
</s>
<s>
The	O
source-route	O
bridging	O
algorithm	O
was	O
developed	O
by	O
IBM	O
and	O
was	O
proposed	O
to	O
the	O
IEEE	B-Device
802.5	I-Device
committee	O
as	O
the	O
means	O
to	O
bridge	O
between	O
all	O
the	O
LANS	O
.	O
</s>
<s>
A	O
field	O
in	O
the	O
Token	B-Device
Ring	I-Device
header	O
,	O
the	O
routing	O
information	O
field	O
(	O
RIF	O
)	O
,	O
is	O
used	O
to	O
support	O
source-route	O
bridging	O
.	O
</s>
<s>
This	O
method	O
of	O
locating	O
a	O
destination	O
network	O
can	O
allow	O
for	O
indirect	O
load	B-Application
balancing	I-Application
among	O
multiple	O
bridges	O
connecting	O
two	O
networks	O
.	O
</s>
<s>
They	O
are	O
primarily	O
found	O
in	O
Token	B-Device
Ring	I-Device
networks	I-Device
.	O
</s>
