 FreeBSD 's TCP / IP stack is based on the 4.2BSD implementation of TCP / IP which greatly contributed to the widespread adoption of these protocols . FreeBSD also supports IPv6 , SCTP , IPSec , and wireless networking ( Wi @-@ Fi ) . The IPv6 and IPSec stacks were taken from the KAME project . Also , FreeBSD supports IPX and AppleTalk protocols , but they are considered old and it is planned to drop support of them in the upcoming FreeBSD 11 @.@ 0 . 
