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Leonard Kleinrock

Last Edit: 10/01/17

Leonard Kleinrock was born on the 13th of June, 1934 in New York City, in the United States of America. Kleinrock studied for his degree in New York (City College), and then later studied for a master's degree and PH.d (M.I.T) from 1957-1963. Kleinrock studied engineering, and specifically it's application to electronics and computing. Kleinrock taught as a Professor of Computer Science at UCLA from 1963 to the present day (2014).

Leonard Kleinrock is a computer scientist who is viewed as one of the pioneers of the Internet. Leonard Kleinrock developed queueing theory in the 1960's; queueing theory played a crucial role in implementing packet switching into ARPANET. ARPANET was one of the first computer networks to use packet switching - ARPANET inspired the creation of the Internet - and Leonard Kleinrock was a prominent computer scientist in the creation of ARPANET.

The UCLA laboratory became the first node (location) of ARPANET; it had an IMP (Interface Message Processor) installed; which was built by Bolt, Beranek and Newman technologies. The second node was located at SRI (Stanford Research Institute) International. Kleinrock directed (to one of his students: Charles S. Kline) the sending of the first message from UCLA to SRI. UCLA would become a "backbone" node of ARPANET.

While at UCLA, Kleinrock developed two theories which made "key" contributions to how the modern day Internet functions. Kleinrock, in the 1960's, developed queueing theory, and in the 1970's, developed a theory for hierarchical routing. Hierarchical routing was implemented into TCP/IP (core Internet protocols); the IP protocol uses a two-level hierarchical address routing system.

Kleinrock's immense contribution to computer science, computer networking, and the Internet is without question. Likewise his academic loyalty: spent exclusively at UCLA. Kleinrock has been awarded numerous prestigious prizes and awards for engineering and computing, and has been inducted as a fellow into many important academic societies.