Protocol pipelining

[Image:HTTP pipelining2.svg|thumb|right|300px|Schema of non-pipelined vs. pipelined connection.]
Protocol pipelining is a technique in which multiple requests are written out to a single socket without waiting for the corresponding responses. Pipelining can be used in various application layer network protocols, like HTTP/1.1, SMTP and FTP.
The pipelining of requests results in a dramatic improvement in protocol performance, especially over high latency connections. Pipelining reduces waiting time of a process.