Maximum segment lifetime
Maximum segment lifetime is the time a TCP segment can exist in the internetwork system. It is arbitrarily defined to be long. The Maximum Segment Lifetime value is used to determine the TIME_WAIT interval (2*MSL) The command that can be used on many Unix systems to determine the TIME_WAIT interval is: 60000 (60 seconds) is a common value. On FreeBSD systems this description and value can be checked by the command sysctl: which gets the result: On some Linux systems, this value can be checked by either of the commands below: