<s>
CUBIC	O
is	O
a	O
network	O
congestion	O
avoidance	O
algorithm	O
for	O
TCP	B-Protocol
which	O
can	O
achieve	O
high	O
bandwidth	O
connections	O
over	O
networks	O
more	O
quickly	O
and	O
reliably	O
in	O
the	O
face	O
of	O
high	O
latency	O
than	O
earlier	O
algorithms	O
.	O
</s>
<s>
In	O
2006	O
,	O
the	O
first	O
CUBIC	O
implementation	O
was	O
released	O
in	O
Linux	B-Application
kernel	B-Application
2.6.13	I-Application
.	O
</s>
<s>
Since	O
kernel	O
version	O
2.6.19	O
,	O
CUBIC	O
replaces	O
BIC-TCP	B-Protocol
as	O
the	O
default	O
TCP	B-Protocol
congestion	O
control	O
algorithm	O
in	O
the	O
Linux	B-Application
kernel	O
.	O
</s>
<s>
MacOS	B-Application
adopted	O
TCP	B-Protocol
CUBIC	I-Protocol
with	O
the	O
OS	B-Device
X	I-Device
Yosemite	I-Device
release	O
in	O
2014	O
,	O
while	O
the	O
previous	O
release	O
OS	B-Operating_System
X	I-Operating_System
Mavericks	I-Operating_System
still	O
used	O
TCP	B-Protocol
New	O
Reno	O
.	O
</s>
<s>
CUBIC	O
is	O
a	O
less	O
aggressive	O
and	O
more	O
systematic	O
derivative	O
of	O
BIC	B-Protocol
TCP	I-Protocol
,	O
in	O
which	O
the	O
window	O
size	O
is	O
a	O
cubic	O
function	O
of	O
time	O
since	O
the	O
last	O
congestion	O
event	O
,	O
with	O
the	O
inflection	O
point	O
set	O
to	O
the	O
window	O
size	O
prior	O
to	O
the	O
event	O
.	O
</s>
<s>
Another	O
major	O
difference	O
between	O
CUBIC	O
and	O
many	O
earlier	O
TCP	B-Protocol
algorithms	O
is	O
that	O
it	O
does	O
not	O
rely	O
on	O
the	O
cadence	O
of	O
RTTs	O
to	O
increase	O
the	O
window	O
size	O
.	O
</s>
<s>
With	O
earlier	O
algorithms	O
like	O
TCP	B-Protocol
New	O
Reno	O
,	O
flows	O
with	O
very	O
short	O
round-trip	O
delay	O
times	O
(	O
RTTs	O
)	O
will	O
receive	O
ACKs	O
faster	O
and	O
therefore	O
have	O
their	O
congestion	O
windows	O
grow	O
faster	O
than	O
other	O
flows	O
with	O
longer	O
RTTs	O
.	O
</s>
