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Local area network

  • US 4,847,834 A
  • Filed: 01/07/1988
  • Issued: 07/11/1989
  • Est. Priority Date: 11/14/1984
  • Status: Expired due to Fees
First Claim
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1. A local network comprising:

  • a controller connected to a transmission medium, said controller assigning an address to a terminal connected to said transmission medium in response to a received address request accompanied by a random number over said transmission medium, and transmitting said assigned address with said random number over said transmission medium;

    a plurality of terminals connected to said transmission medium, each of said terminals including;

    means for locally generating and storing a random number to be transmitted with an address request over said medium each time a specific interactive operation is performed by a human at said terminal, whereby the likelihood of generating the same random number at different terminals is reduced;

    means for transmitting an address request with said locally stored random number over said transmission medium;

    means for receiving from said controller over said transmission medium a random number appended to an assigned address; and

    means for comparing said received random number with said stored locally generated random number, whereby said appended address is identified as to whether it is the address assigned to a requesting terminal; and

    means comprised in said controller for interrogating each terminal at regular intervals to log the address and random number of each terminal.

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