Cambridge Ring
The Cambridge Ring was an experimental local area network architecture developed at the Cambridge University Computer Laboratory in the mid-late 1970s and early 1980s. It used a ring topology with a theoretical limit of 255 nodes (though such a large number would have badly affected performance), around which cycled a fixed number of packets. Free packets would be "loaded" with data by a machine wishing to send, marked as received by the destination machine, and "unloaded" on return to the sender; thus in principle there could be as many simultaneous senders as packets. The network ran over twin twisted-pair cabling (plus a fibre-optic section).
People associated with the project include Andy Hopper, David Wheeler, Maurice Wilkes, and Roger Needham.[1]
Apple Inc. copied most of the (unpatented) architecture and renamed it AppleTalk. [2]
In 2002 the Cambridge University Computer Laboratory launched a graduate society called the Cambridge Computer Lab Ring named after the Cambridge Ring.
[edit] See also
[edit] References
- ^ Andrew Hopper; Roger Needham. "The Cambridge Fast Ring Networking System". ORL-88-1. http://www.cl.cam.ac.uk/research/dtg/lce-pub/public/files/tr.88.1.pdf.
- ^ Missing The Big Time by Wendy Grossman in Personal Computer World Magazine (May 1993)
[edit] External links
- Cambridge Ring Hardware
- Cambridge Fast Ring
- Cambridge Backbone Ring Hardware
- Cambridge Computer Lab Ring
- "Ring PCB". Relic Archive. University of Cambridge Computer Laboratory. http://www.cl.cam.ac.uk/cgi-bin/relicd?name=&machine=any&class=any&uid=34/97. Retrieved 9 April 2011.
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