http://www.rfc-editor.org/rfc/rfc6191.txt
RFC 6191: Reducing the TIME-WAIT State Using TCP Timestamps, F. Gont2011-04-01T23:00:00-00:00This document describes an algorithm for processing incoming SYN segments that allows higher connection-establishment rates between any two TCP endpoints when a TCP Timestamps option is present in the incoming SYN segment. This document only modifies processing of SYN segments received for connections in the TIME-WAIT state; processing in all other states is unchanged. This memo documents an Internet Best Current Practice.