<s>
In	O
a	O
telephone	O
network	O
,	O
flood	B-Protocol
search	I-Protocol
routing	I-Protocol
is	O
non-deterministic	O
routing	B-Protocol
in	O
which	O
a	O
dialed	O
number	O
received	O
at	O
a	O
switch	O
is	O
transmitted	O
to	O
all	O
switches	O
,	O
i.e.	O
,	O
flooded	O
,	O
in	O
the	O
area	O
code	O
directly	O
connected	O
to	O
that	O
switch	O
;	O
if	O
the	O
dialed	O
number	O
is	O
not	O
an	O
affiliated	O
subscriber	O
at	O
that	O
switch	O
,	O
the	O
number	O
is	O
then	O
retransmitted	O
to	O
all	O
directly	O
connected	O
switches	O
,	O
and	O
then	O
routed	B-Protocol
through	O
the	O
switch	O
that	O
has	O
the	O
dialed	O
number	O
corresponding	O
to	O
the	O
particular	O
user	O
end	O
instrument	O
affiliated	O
with	O
it	O
.	O
</s>
<s>
Flood	B-Protocol
search	I-Protocol
routing	I-Protocol
allows	O
subscribers	O
to	O
have	O
telephone	O
numbers	O
independent	O
of	O
switch	O
codes	O
.	O
</s>
<s>
Flood	B-Protocol
search	I-Protocol
routing	I-Protocol
provides	O
the	O
highest	O
probability	O
that	O
a	O
telephone	O
call	O
will	O
go	O
through	O
even	O
though	O
a	O
number	O
of	O
switches	O
and	O
links	O
fail	O
.	O
</s>
<s>
Flood	B-Protocol
search	I-Protocol
routing	I-Protocol
is	O
used	O
in	O
military	O
telecommunication	O
systems	O
,	O
such	O
as	O
the	O
mobile	O
subscriber	O
equipment	O
(	O
MSE	O
)	O
system	O
.	O
</s>
