<s>
Type	O
of	O
Transmission	B-Protocol
Control	I-Protocol
Protocol	I-Protocol
which	O
is	O
designed	O
to	O
provide	O
much	O
higher	O
throughput	O
and	O
scalability	B-Architecture
.	O
</s>
<s>
Effectively	O
,	O
this	O
process	O
keeps	O
halving	O
the	O
throughput	O
until	O
packet	B-Protocol
loss	I-Protocol
stops	O
.	O
</s>
<s>
Once	O
the	O
packet	B-Protocol
loss	I-Protocol
subsides	O
,	O
slow	O
start	O
kicks	O
in	O
to	O
ramp	O
the	O
speed	O
back	O
up	O
.	O
</s>
<s>
Scalable	B-Protocol
TCP	I-Protocol
modifies	O
the	O
congestion	O
control	O
algorithm	O
.	O
</s>
<s>
Instead	O
of	O
halving	O
the	O
congestion	O
window	O
size	O
,	O
each	O
packet	B-Protocol
loss	I-Protocol
decreases	O
the	O
congestion	O
window	O
by	O
a	O
small	O
fraction	O
(	O
a	O
factor	O
of	O
1/8	O
instead	O
of	O
Standard	O
TCP	O
's	O
1/2	O
)	O
until	O
packet	B-Protocol
loss	I-Protocol
stops	O
.	O
</s>
<s>
When	O
packet	B-Protocol
loss	I-Protocol
stops	O
,	O
the	O
rate	O
is	O
ramped	O
up	O
at	O
a	O
slow	O
fixed	O
rate	O
(	O
one	O
packet	O
is	O
added	O
for	O
every	O
one	O
hundred	O
successful	O
acknowledgements	O
)	O
instead	O
of	O
the	O
Standard	O
TCP	O
rate	O
that	O
's	O
the	O
inverse	O
of	O
the	O
congestion	O
window	O
size	O
(	O
thus	O
very	O
large	O
windows	O
take	O
a	O
long	O
time	O
to	O
recover	O
)	O
.	O
</s>
