Editing Chaosnet (section)

==Origin==
The Chaosnet protocol originally used an implementation over [[CATV]] coaxial cable modeled on the early [[Xerox PARC]] {{nowrap|3 megabit/second}} [[Ethernet]],<ref>{{harvnb|Moon|1981|p=2}}</ref> the early [[ARPANET]], and [[Transmission Control Protocol]] (TCP). It was a contention-based system intended to work over a {{nowrap|0–1000 meter}} range,<ref>{{harvnb|Moon|1981|p=3}}</ref> that included a pseudo-slotted feature intended to reduce collisions, which worked by passing a virtual token of permission from host to host; successful packet transmissions updated each host's knowledge of which host had the token at that time. Collisions caused a host to fall silent for a duration depending on the distance from the host it collided with.<ref>{{harvnb|Moon|1981|pp=6–8}}</ref> Collisions were never a real problem, and the pseudo-slotting fell into disuse.

Chaosnet's network topology was usually a series of linear (not circular) cables, each up to a maximum of a kilometer and roughly 12 clients. The individual segments were interconnected by "bridges" (much in the ARPANET mold), generally older computers like [[PDP-11]]s with two network interfaces.<ref>{{harvnb|Moon|1981|p=3, 14}}</ref>

The protocols were also later implemented as a payload that could be carried over Ethernet (usually the later {{nowrap|10 megabit/second}} variety). Chaosnet was specifically for LANs; features to support [[Wide area network|WANs]] were left out for the sake of simplicity.<ref>{{harvnb|Moon|1981|p=1}}</ref>

Chaosnet can be regarded as a contemporary of both the [[PARC Universal Packet|PUP]] protocols invented by PARC, and the [[Internet Protocol]] (IP), and was recognized as one of the other network classes (other than "[[Internet|IN]]" and "[[Hesiod (name_service)|HS]]") in the [[Domain Name System]].{{Ref RFC|1034|rsection=3.6}} [[BIND]] uses a built-in pseudo-top-level-domain in the "CHAOS class" for retrieving information about a running DNS server.<ref>{{Cite web |url=http://www.bind9.net/manual/bind/9.3.2/Bv9ARM.ch06.html#builtin |title=BIND 9 version 9.3.2 Manual / User Guide |access-date=2009-10-28 |archive-date=2006-07-18 |archive-url=https://web.archive.org/web/20060718215648/http://www.bind9.net/manual/bind/9.3.2/Bv9ARM.ch06.html#builtin |url-status=dead }}</ref>