Editing Serial Line Internet Protocol (section)

== History ==
{{See also|History of the Internet}}
RFC 1055, a "non-standard" for SLIP, traces its origins to the 3COM UNET TCP/IP implementation from the 1980s. Rick Adams added SLIP to the popular [[4.2BSD]] in 1984 and it "quickly caught on". By the time of the RFC (1988), it is described as "commonly used on dedicated serial links and sometimes for dialup purposes".<ref name=rfc1055>{{cite web |title=RFC 1055: Nonstandard for transmission of IP datagrams over serial lines: SLIP |url=https://datatracker.ietf.org/doc/html/rfc1055 |website=IETF Datatracker |language=en |date=1 June 1988}}</ref>

The last version of FreeBSD to include "slattach" (a command for connecting to slip) in the manual database is FreeBSD 7.4, released 2011. The manual claims that auto-negotiation exists for CSLIP. The FreeBSD version is inherited from 4.3BSD.<ref>{{cite web |title=slattach(8) |url=https://man.freebsd.org/cgi/man.cgi?query=slip&apropos=0&sektion=8&manpath=FreeBSD+7.4-RELEASE&arch=default&format=html |website=man.freebsd.org}}</ref>

Linux formerly used the same code base for SLIP and [[KISS (TNC)]]. The split occurred before the start of kernel git history (Linux-2.6.12-rc2, 2005).<ref>{{cite web |last1=Torvalds |first1=Linus |title=History for mkiss.c |website=[[GitHub]] |url=https://github.com/torvalds/linux/blob/9a48d604672220545d209e9996c2a1edbb5637f6/drivers/net/hamradio/mkiss.c |access-date=13 May 2023 |date=13 May 2023}}</ref> The SLIP driver offers a special "6-bit" escaped mode to accommodate modems incapable of handling non-ASCII characters.<ref>{{cite web |last1=Torvalds |first1=Linus |title=drivers/net/slip/Kconfig |website=[[GitHub]] |url=https://github.com/torvalds/linux/blob/master/drivers/net/slip/Kconfig |date=13 May 2023}}</ref> The Linux slattach command (written independently) also has the ability to auto-detect CSLIP support.<ref>{{man|8|slattach|Linux}} "Other possible values are slip (normal SLIP), adaptive (adaptive CSLIP/SLIP)...</ref>