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以太网知多少 - 鼻祖-客家人

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发表于 2007-12-13 09:44:48 | 显示全部楼层 |阅读模式
以太网知多少
以太网鼻祖-客家人
話說卅七年前在火魯奴如島有一台灣來的博士生正在研發如何把夏威夷的電腦和美國大陸電腦群聯結運作-美DOD的ARPA网絡。

今曰有線以太网是MIT博士后-Metcalfe從這客家博士論文的阿樓哈(ALOHA)計劃原理開發出來的。無線以太网更接進阿樓哈計劃原理了。以太网在今日已是無孔不入了。

我們今天是生活在互聯网中的以太連結网絡中。消息論原理和無線网絡通訊是當年夏威夷大学強項。有兩大師在此任教和研發。

所以我說以太网鼻祖是一客家人-是台灣新竹玻璃厂一公子,也是我夏大的同學。

名子讓大家猜一猜吧!
Metcalfe 生平:
Metcalfe graduated from MIT in 1969 with two S.B. degrees, one in Electrical Engineering and the other in management from the MIT Sloan School of Management. He then went to Harvard for graduate school, earning his M.S. in 1970.

While pursuing a doctorate in computer science, Metcalfe took a job with MIT's Project MAC after Harvard refused to let him be responsible for connecting the school to the brand-new Arpanet. At MIT's Project MAC, Metcalfe was responsible for building some of the hardware that would link MIT's minicomputers with the Arpanet. Metcalfe was so enamored with Arpanet, he made it the topic of his doctoral dissertation. However, Harvard flunked him. His inspiration for a new dissertation came while working at Xerox PARC where he read a paper about the ALOHA network at the University of Hawaii. He identified and fixed some of the bugs in the AlohaNet model and made his analysis part of a revised thesis, which finally earned him his Harvard PhD in 1973.[2]

Metcalfe was working at Xerox PARC in 1973 when he co-invented Ethernet, a standard for connecting computers over short distances, with David Boggs. Metcalfe pegs the exact day Ethernet was born: May 22, 1973, the day he circulated a memo titled "Alto Ethernet" which contained a rough schematic of how Ethernet would work. "That is the first time ethernet appears as a word, as does the idea of using coax as ether, where the participating stations, like in AlohaNet or Arpanet, would inject their packets of data, they'd travel around at megabits per second, there would be collisions, and retransmissions, and back-off," Metcalfe explains. David Boggs offers another date as the genesis of Ethernet: November 11, 1973, the first day the system actually functioned.[3]

In 1979, Metcalfe departed PARC and founded 3Com, a manufacturer of computer networking equipment. In 1980 he received the Association for Computing Machinery Grace Murray Hopper Award for his contributions to the development of local networks, specifically Ethernet. In 1990 Metcalfe lost a boardroom skirmish at 3Com in the contest to succeed Bill Krause as CEO. The board of directors chose Eric Benhamou to run the networking company Metcalfe had founded in his Palo Alto apartment in 1979. Metcalfe left 3Com and began a 10 year stint as a publisher and pundit, writing an Internet column for InfoWorld. He became a venture capitalist in 2001 and is now a General Partner at Polaris Venture Partners. He is a director of Pop!Tech, an executive technology conference he cofounded in 1997.

[ 本帖最后由 namlow 于 2008-7-9 20:10 编辑 ]
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 楼主| 发表于 2008-7-9 20:05:51 | 显示全部楼层

第一个使用无线电广播来...

http://www.ee.zsu.edu.cn/network/newpage26.htm
第一个使用无线电广播来代替点到点连接线路作为通信设施的计算机系统是夏威夷大学的ALOHA系统。它始建于1971年,这个系统所采用的技术是地面无线电广播技术,采用的协议就是有名的ALOHA协议,叫做纯ALOHA(Pure ALOHA)。以后,在此基础上,又有了许多改进过的ALOHA协议被用于卫星广播网和其它广播网络。
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是今天的互联网技术的一大突破!
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发表于 2008-7-24 14:54:10 | 显示全部楼层
呼呼   路过  支持了
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