<s>
In	O
electrical	O
and	O
electronic	O
engineering	O
,	O
a	O
daisy	B-Application
chain	I-Application
is	O
a	O
wiring	O
scheme	O
in	O
which	O
multiple	O
devices	O
are	O
wired	O
together	O
in	O
sequence	O
or	O
in	O
a	O
ring	O
,	O
similar	O
to	O
a	O
garland	O
of	O
daisy	O
flowers	O
.	O
</s>
<s>
Daisy	B-Application
chains	I-Application
may	O
be	O
used	O
for	O
power	O
,	O
analog	O
signals	O
,	O
digital	O
data	O
,	O
or	O
a	O
combination	O
thereof	O
.	O
</s>
<s>
The	O
term	O
daisy	B-Application
chain	I-Application
may	O
refer	O
either	O
to	O
large	O
scale	O
devices	O
connected	O
in	O
series	O
,	O
such	O
as	O
a	O
series	O
of	O
power	O
strips	O
plugged	O
into	O
each	O
other	O
to	O
form	O
a	O
single	O
long	O
line	O
of	O
strips	O
,	O
or	O
to	O
the	O
wiring	O
patterns	O
embedded	O
inside	O
of	O
devices	O
.	O
</s>
<s>
Other	O
examples	O
of	O
devices	O
which	O
can	O
be	O
used	O
to	O
form	O
daisy	B-Application
chains	I-Application
are	O
those	O
based	O
on	O
Universal	B-Protocol
Serial	I-Protocol
Bus	I-Protocol
(	O
USB	B-Protocol
)	O
,	O
FireWire	B-Protocol
,	O
Thunderbolt	B-Protocol
and	O
Ethernet	O
cables	O
.	O
</s>
<s>
For	O
analog	O
signals	O
,	O
connections	O
usually	O
consist	O
of	O
a	O
simple	O
electrical	B-General_Concept
bus	I-General_Concept
and	O
,	O
especially	O
in	O
the	O
case	O
of	O
a	O
chain	B-Algorithm
of	I-Algorithm
many	I-Algorithm
devices	I-Algorithm
,	O
may	O
require	O
the	O
use	O
of	O
one	O
or	O
more	O
repeaters	O
or	O
amplifiers	O
within	O
the	O
chain	B-Algorithm
to	O
counteract	O
attenuation	O
(	O
the	O
natural	O
loss	O
of	O
energy	O
in	O
such	O
a	O
system	O
)	O
.	O
</s>
<s>
Digital	O
signals	O
between	O
devices	O
may	O
also	O
travel	O
on	O
a	O
simple	O
electrical	B-General_Concept
bus	I-General_Concept
,	O
in	O
which	O
case	O
a	O
bus	B-General_Concept
terminator	O
may	O
be	O
needed	O
on	O
the	O
last	O
device	O
in	O
the	O
chain	B-Algorithm
.	O
</s>
<s>
However	O
,	O
unlike	O
analog	O
signals	O
,	O
because	O
digital	O
signals	O
are	O
discrete	O
,	O
they	O
may	O
also	O
be	O
electrically	O
regenerated	O
,	O
but	O
not	O
modified	O
,	O
by	O
any	O
device	O
in	O
the	O
chain	B-Algorithm
.	O
</s>
<s>
Some	O
hardware	O
can	O
be	O
attached	O
to	O
a	O
computing	O
system	O
in	O
a	O
daisy	B-Application
chain	I-Application
configuration	O
by	O
connecting	O
each	O
component	O
to	O
another	O
similar	O
component	O
,	O
rather	O
than	O
directly	O
to	O
the	O
computing	O
system	O
that	O
uses	O
the	O
component	O
.	O
</s>
<s>
Only	O
the	O
last	O
component	O
in	O
the	O
chain	B-Algorithm
directly	O
connects	O
to	O
the	O
computing	O
system	O
.	O
</s>
<s>
e.g.	O
,	O
only	O
one	O
seizes	O
the	O
communications	O
bus	B-General_Concept
at	O
a	O
time	O
.	O
</s>
<s>
SCSI	B-Architecture
is	O
an	O
example	O
of	O
a	O
digital	O
system	O
that	O
is	O
electrically	O
a	O
bus	B-General_Concept
,	O
in	O
the	O
case	O
of	O
external	O
devices	O
,	O
is	O
physically	O
wired	O
as	O
a	O
daisy	B-Application
chain	I-Application
.	O
</s>
<s>
Since	O
the	O
network	O
is	O
electrically	O
a	O
bus	B-General_Concept
,	O
it	O
must	O
be	O
terminated	O
and	O
this	O
may	O
be	O
done	O
either	O
by	O
plugging	O
a	O
terminator	O
into	O
the	O
last	O
device	O
or	O
selecting	O
an	O
option	O
to	O
make	O
the	O
device	O
terminate	O
internally	O
.	O
</s>
<s>
MIDI	O
devices	O
are	O
usually	O
designed	O
to	O
be	O
wired	O
in	O
a	O
daisy	B-Application
chain	I-Application
.	O
</s>
<s>
The	O
difference	O
can	O
result	O
in	O
the	O
signals	O
arriving	O
at	O
different	O
times	O
;	O
if	O
the	O
chain	B-Algorithm
is	O
long	O
enough	O
,	O
it	O
will	O
be	O
distorted	O
so	O
much	O
that	O
the	O
system	O
can	O
become	O
unreliable	O
or	O
non-functional	O
.	O
</s>
<s>
Some	O
Serial	B-Architecture
Peripheral	I-Architecture
Interface	I-Architecture
Bus	I-Architecture
(	O
SPI	O
)	O
IC	O
products	O
are	O
designed	O
with	O
daisy	B-Application
chain	I-Application
capability	O
.	O
</s>
<s>
Thunderbolt	B-Protocol
(	O
interface	O
)	O
also	O
supports	O
daisy-chained	O
devices	O
such	O
as	O
RAID	B-Architecture
arrays	I-Architecture
and	O
computer	B-Device
monitors	I-Device
.	O
</s>
<s>
The	O
Hexbus	O
is	O
the	O
10-wire	O
bus	B-General_Concept
of	O
Texas	O
Instruments	O
,	O
used	O
in	O
the	O
TI-99/4A	B-Device
,	O
CC-40	B-Device
and	O
TI-74	B-Device
.	O
</s>
<s>
Any	O
particular	O
daisy	B-Application
chain	I-Application
forms	O
one	O
of	O
two	O
network	O
topologies	O
:	O
</s>
<s>
Linear	O
topology	O
:	O
For	O
example	O
,	O
A-B-C-D-E	O
,	O
A-B-C-D-E	O
&	O
C-M-N-O	O
(	O
branched	O
at	O
C	O
)	O
are	O
daisy	B-Application
chain	I-Application
.	O
</s>
<s>
This	O
is	O
often	O
called	O
a	O
"	O
daisy	B-Application
chain	I-Application
loop	O
"	O
.	O
</s>
<s>
Users	O
can	O
daisy	B-Application
chain	I-Application
computing	O
sessions	O
together	O
.	O
</s>
<s>
Using	O
services	O
such	O
as	O
Telnet	B-Protocol
or	O
SSH	B-Protocol
,	O
the	O
user	O
creates	O
a	O
session	O
on	O
a	O
second	O
computer	O
via	O
Telnet	B-Protocol
,	O
and	O
from	O
the	O
second	O
session	O
,	O
Telnets	B-Protocol
to	O
a	O
third	O
and	O
so	O
on	O
.	O
</s>
<s>
Another	O
typical	O
example	O
is	O
the	O
"	O
terminal	O
session	O
inside	O
a	O
terminal	O
session	O
"	O
using	O
RDP	B-Protocol
.	O
</s>
<s>
Reasons	O
to	O
create	O
daisy	B-Application
chains	I-Application
include	O
connecting	O
to	O
a	O
system	O
on	O
a	O
non-routed	O
network	O
via	O
a	O
gateway	O
system	O
,	O
preserving	O
sessions	O
on	O
the	O
initial	O
computer	O
while	O
working	O
on	O
a	O
second	O
computer	O
,	O
to	O
save	O
bandwidth	O
or	O
improve	O
connectivity	O
on	O
an	O
unstable	O
network	O
by	O
first	O
connecting	O
to	O
a	O
better	O
connected	O
machine	O
.	O
</s>
