<s>
Protocol	B-Protocol
pipelining	I-Protocol
is	O
a	O
technique	O
in	O
which	O
multiple	O
requests	O
are	O
written	O
out	O
to	O
a	O
single	O
socket	B-Protocol
without	O
waiting	O
for	O
the	O
corresponding	O
responses	O
.	O
</s>
<s>
Pipelining	O
can	O
be	O
used	O
in	O
various	O
application	B-Application
layer	I-Application
network	O
protocols	O
,	O
like	O
HTTP/1.1	B-Protocol
,	O
SMTP	B-Protocol
and	O
FTP	B-Protocol
.	O
</s>
