Information about Metcalfe's Law
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Metcalfe's law states that the value of a telecommunications network is proportional to the square of the number of users
of the system (n2). First formulated by Robert Metcalfe in regard to Ethernet, Metcalfe's law explains many of the network effects of communication technologies and networks such as the Internet, social networking, and the World Wide Web. The number of unique connections in a network of a number of nodes (n) can be expressed mathematically as n*(n-1)/2.
The law has often been illustrated using the example of fax machines: A single fax machine is useless, but the value of every fax machine increases with the total number of fax machines in the network, because the total number of people with whom each user may send and receive documents increases.
See also
- The generalized Network effect of microeconomics.
- Reed's law
External links
- Metcalfe's Law: More Misunderstood Than Wrong?. A co-worker of Bob Metcalfe puts the IEEE Spectrum critique in perspective. Republished in Web 2.0 Journal here.
- Metcalfe's Law is Wrong. Bob Briscoe, Andrew Odlyzko, and Benjamin Tilly, July 2006 IEEE Spectrum. Points out that Metcalfe's Law is wrong, that the value is closer to n log(n)
- Metcalfe’s Law Recurses Down the Long Tail of Social Networking by Bob Metcalfe
- ZDNet: Metcalfe's Law overshoots the mark
- Andrew Odlyzko and Benjamin Tilly paper
- Metcalfe's Law in Reverse, applying Metcalfe's law to form an argument in favour of large, unified networks.
- George Church. The Personal Genome Project. Molecular Systems Biology. 13 December 2005
A telecommunications network is a of telecommunications links and nodes arranged so that messages may be passed from one part of the network to another over multiple links and through various nodes.
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Robert Melancton Metcalfe (born April 7[1], 1946 in Brooklyn, New York) is an American technology pioneer who co-invented Ethernet with David Boggs, founded 3Com and formulated Metcalfe's Law. As of January 2006, he is a general partner of Polaris Venture Partners.
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Ethernet is a family of frame-based computer networking technologies for local area networks (LANs). The name comes from the physical concept of the ether. It defines a number of wiring and signaling standards for the physical layer, through means of network access at the Media
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A network effect is a characteristic that causes a good or service to have a value to a potential customer which depends on the number of other customers who own the good or are users of the service.
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Internet is a worldwide, publicly accessible series of interconnected computer networks that transmit data by packet switching using the standard Internet Protocol (IP). It is a "network of networks" that consists of millions of smaller domestic, academic, business, and government
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A social network service focuses on the building and verifying of online social networks for communities of people who share interests and activities, or who are interested in exploring the interests and activities of others, and which necessitates the use of software.
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World Wide Web (commonly shortened to the Web) is a system of interlinked, hypertext documents accessed via the Internet. With a web browser, a user views web pages that may contain text, images, videos, and other multimedia and navigates between them using hyperlinks.
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Fax (short for facsimile, from Latin fac simile, "make similar", i.e. "make a copy") is a telecommunications technology used to transfer copies (facsimiles) of documents, especially using affordable devices operating over the telephone network.
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A network effect is a characteristic that causes a good or service to have a value to a potential customer which depends on the number of other customers who own the good or are users of the service.
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Reed's law is the assertion of David P. Reed that the utility of large , particularly social networks, can scale exponentially with the size of the network.
The reason for this is that the number of possible sub-groups of network participants is , where is the number of
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The reason for this is that the number of possible sub-groups of network participants is , where is the number of
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