<s>
Fate-sharing	B-Application
is	O
an	O
engineering	O
design	O
philosophy	O
where	O
related	O
parts	O
of	O
a	O
system	O
are	O
yoked	O
together	O
,	O
so	O
that	O
they	O
either	O
fail	O
together	O
or	O
not	O
at	O
all	O
.	O
</s>
<s>
Fate-sharing	B-Application
is	O
an	O
example	O
of	O
the	O
end-to-end	B-Application
principle	I-Application
.	O
</s>
<s>
The	O
term	O
"	O
fate-sharing	B-Application
"	O
was	O
defined	O
by	O
David	O
D	O
.	O
Clark	O
in	O
his	O
1988	O
paper	O
"	O
The	O
Design	O
Philosophy	O
of	O
the	O
DARPA	O
Internet	O
Protocols	O
"	O
as	O
follows	O
:	O
</s>
<s>
The	O
fate-sharing	B-Application
model	O
suggests	O
that	O
it	O
is	O
acceptable	O
to	O
lose	O
the	O
state	O
information	O
associated	O
with	O
an	O
entity	O
if	O
,	O
at	O
the	O
same	O
time	O
,	O
the	O
entity	O
itself	O
is	O
lost	O
.	O
</s>
<s>
A	O
good	O
example	O
of	O
fate-sharing	B-Application
is	O
the	O
transmission	O
of	O
routing	O
messages	O
in	O
routing	B-Protocol
protocols	I-Protocol
such	O
as	O
BGP	B-Protocol
,	O
where	O
the	O
failure	O
of	O
a	O
link	O
or	O
link	O
interface	O
automatically	O
has	O
the	O
effect	O
of	O
terminating	O
routing	O
announcements	O
through	O
that	O
interface	O
,	O
ultimately	O
resulting	O
in	O
the	O
tearing	O
down	O
of	O
the	O
state	O
for	O
that	O
route	O
at	O
each	O
end	O
of	O
the	O
link	O
.	O
</s>
<s>
Similar	O
considerations	O
apply	O
to	O
TCP	B-Protocol
.	O
</s>
