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2007-02-26 02:49:36 · 3 answers · asked by bob_smith_6666 1 in Science & Mathematics Engineering

3 answers

IBM company developed the token ring protocol.

Token-Ring has been a bit of a mystery for many people. This is due to the fact that Ethernet, and other Carrier Sense Multi Access - Collision Detection (CSMA/CD) networks, are the most widely installed network topology.
This is because most network designers cannot look past the initial cost of Token-Ring. While Token-Ring does cost more per port to install, it offers vast benefits over Ethernet and other CSMA/CD topologies.

Both Ethernet and Token-Ring have their strengths and weaknesses and each is suited for a particular environment. Before an analyst can choose either, both systems must be completely understood. This article will examine the Token-Ring network and its specifications and characteristics.

For those of you who have a Token-Ring presence in your network, these articles may fill a few blanks and offer some insight into its operation. Either way, this is intended to provide you with a reference on the operation of the Token-Ring networks operation.

IEEE 802.5 describes a network developed commercially by IBM. In fact, IBM had a big hand in the definition of the standard. Wouldn't you if there was a chance that your pet technology could become a networking standard?
IEEE 802.5 is made up of two sections: one describing the Physical Layer standards on the OSI model and the other specifying the Medial Access Control (MAC) sublayer of the OSI Data Link layer. (see graphic) As a review, the Physical Layer of the OSI model describes the electrical signals, wiring, connectors, and other physical properties of the network. The MAC sublayer resides in the second level of the OSI model, the Data Link Layer. This layer describes how data is grouped into logical frames, errors are detected, data flow control is handled and how individual computers are identified on the network.

The second Token-Ring standard is the one that is constantly being improved by IBM. Since they, in essence, developed the Token-Ring network technology, IBM is considered the major proponent of Token-Ring. IBM's standard include all the specifications of the IEEE 802.5 standard, while adding more features to make Token-Ring more appealing to potential customers and compatible with IBM products.

http://66.218.69.11/search/cache?ei=UTF-8&fr=slv8-msgr&p=data+transfer+rate+for+token+ring+technology&u=www.bralyn.net/techpages/papers/token.ring.html&w=data+transfer+rate+token+ring+rings+technology+technologies&d=OwllYuxsOSE5&icp=1&.intl=us
http://computer.howstuffworks.com/ethernet17.htm

2007-02-26 03:15:18 · answer #1 · answered by Anonymous · 3 1

IBM (International Business Machines , "Big Blue") in 1981

Token ring local area network (LAN) technology was conceived by Olof Söderblom in the late 1960s, then working for IBM. US Patents were awarded in 1981 and Token-Ring was developed and promoted by IBM in the early 1980s and standardized as IEEE 802.5 by the Institute of Electrical and Electronics Engineers.

IBM no longer uses or promotes token ring. Madge Networks, a one time competitor to IBM, is now considered to be the market leader in token ring.

2007-02-26 04:36:17 · answer #2 · answered by kanchis 3 · 0 0

It was IBM

http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/tokenrng.htm

2007-02-26 02:55:18 · answer #3 · answered by Gene 7 · 1 1

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