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Internet Area Network
An Internet area network (IAN) is a concept for a communications network that connects voice and data endpoints within a cloud environment over IP, replacing an existing local area network (LAN), wide area network (WAN) or the public switched telephone network (PSTN). Overview An IAN securely connects endpoints through the public Internet, so that they can communicate and exchange information and data without being tied to a physical location. The IAN eliminates a geographic profile for the network entirely because the applications and communications services have become virtualized. Endpoints need to be connected only over a broadband connection across the Internet. Opposed to IAN, LAN interconnects computers in a limited area such as a home, a school, a computer laboratory or an office building. The WAN also differs from the IAN, because it is a network that covers a broad area, such as any telecommunications network that links across metropolitan, regional, or national boun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Local Area Network
A local area network (LAN) is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building. By contrast, a wide area network (WAN) not only covers a larger geographic distance, but also generally involves leased telecommunication circuits. Ethernet and Wi-Fi are the two most common technologies in use for local area networks. Historical network technologies include ARCNET, Token Ring and AppleTalk. History The increasing demand and usage of computers in universities and research labs in the late 1960s generated the need to provide high-speed interconnections between computer systems. A 1970 report from the Lawrence Radiation Laboratory detailing the growth of their "Octopus" network gave a good indication of the situation. A number of experimental and early commercial LAN technologies were developed in the 1970s. Cambridge Ring was developed at Cambridge University starting in 1974. Ethe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grosch's Law
Grosch's law is the following observation of computer performance, made by Herb Grosch in 1953: I believe that there is a fundamental rule, which I modestly call ''Grosch's law'', giving added economy only as the square root of the increase in speed — that is, to do a calculation ten times as cheaply you must do it hundred times as fast. This adage is more commonly stated as Computer performance increases as the square of the cost. If computer A costs twice as much as computer B, you should expect computer A to be four times as fast as computer B. Two years before Grosch's statement, Seymour Cray was quoted in ''Business Week'' (August 1963) expressing this very same thought: Computers should obey a square law — when the price doubles, you should get at least four times as much speed. The law can also be interpreted as meaning that computers present economies of scale: the more costly is the computer, the price–performance ratio linearly becomes better. This implies that l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Data Centers
A data center (American English) or data centre (British English)See spelling differences. is a building, a dedicated space within a building, or a group of buildings used to house computer systems and associated components, such as telecommunications and storage systems. Since IT operations are crucial for business continuity, it generally includes redundant or backup components and infrastructure for power supply, data communication connections, environmental controls (e.g., air conditioning, fire suppression), and various security devices. A large data center is an industrial-scale operation using as much electricity as a small town. History Data centers have their roots in the huge computer rooms of the 1940s, typified by ENIAC, one of the earliest examples of a data center.Old large computer rooms that housed machines like the U.S. Army's ENIAC, which were developed pre-1960 (1945), were now referred to as "data centers". Early computer systems, complex to operate and ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amazon
Amazon most often refers to: * Amazons, a tribe of female warriors in Greek mythology * Amazon rainforest, a rainforest covering most of the Amazon basin * Amazon River, in South America * Amazon (company), an American multinational technology company Amazon or Amazone may also refer to: Places South America * Amazon Basin (sedimentary basin), a sedimentary basin at the middle and lower course of the river * Amazon basin, the part of South America drained by the river and its tributaries * Amazon Reef, at the mouth of the Amazon basin Elsewhere * 1042 Amazone, an asteroid * Amazon Creek, a stream in Oregon, US People * Amazon Eve (born 1979), American model, fitness trainer, and actress * Lesa Lewis (born 1967), American professional bodybuilder nicknamed "Amazon" Art and entertainment Fictional characters * Amazon (Amalgam Comics) * Amazon, an alias of the Marvel supervillain Man-Killer * Amazons (DC Comics), a group of superhuman characters * The Amazon, a ' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dot-com Bubble
The dot-com bubble (dot-com boom, tech bubble, or the Internet bubble) was a stock market bubble in the late 1990s, a period of massive growth in the use and adoption of the Internet. Between 1995 and its peak in March 2000, the Nasdaq Composite stock market index rose 400%, only to fall 78% from its peak by October 2002, giving up all its gains during the bubble. During the dot-com crash, many online shopping companies, such as Pets.com, Webvan, and Boo.com, as well as several communication companies, such as Worldcom, NorthPoint Communications, and Global Crossing, failed and shut down. Some companies that survived, such as Amazon, lost large portions of their market capitalization, with Cisco Systems alone losing 80% of its stock value. Background Historically, the dot-com boom can be seen as similar to a number of other technology-inspired booms of the past including railroads in the 1840s, automobiles in the early 20th century, radio in the 1920s, television in the 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Virtual Private Network
A virtual private network (VPN) extends a private network across a public network and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network. The benefits of a VPN include increases in functionality, security, and management of the private network. It provides access to resources that are inaccessible on the public network and is typically used for remote workers. Encryption is common, although not an inherent part of a VPN connection. A VPN is created by establishing a virtual point-to-point connection through the use of dedicated circuits or with tunneling protocols over existing networks. A VPN available from the public Internet can provide some of the benefits of a wide area network (WAN). From a user perspective, the resources available within the private network can be accessed remotely. Types Virtual private networks may be classified into several categories: ;Remote acce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dynamic Web Page
A server-side dynamic web page is a web page whose construction is controlled by an application server processing server-side scripts. In server-side scripting, parameters determine how the assembly of every new web page proceeds, and including the setting up of more client-side processing. A client-side dynamic web page processes the web page using JavaScript running in the browser as it loads. JavaScript can interact with the page via Document Object Model, or DOM, to query page state and modify it. Even though a web page can be dynamic on the client-side, it can still be hosted on a static hosting service such as GitHub Pages or Amazon S3 as long as there isn't any server-side code included. A dynamic web page is then reloaded by the user or by a computer program to change some variable content. The updating information could come from the server, or from changes made to that page's DOM. This may or may not truncate the browsing history or create a saved version to go back ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bolt, Beranek And Newman
Raytheon BBN (originally Bolt Beranek and Newman Inc.) is an American research and development company, based next to Fresh Pond in Cambridge, Massachusetts, United States. In 1966, the Franklin Institute awarded the firm the Frank P. Brown Medal, in 1999 BBN received the IEEE Corporate Innovation Recognition, and on 1 February 2013, BBN was awarded the National Medal of Technology and Innovation, the highest honors that the U.S. government bestows upon scientists, engineers and inventors, by President Barack Obama. It became a wholly owned subsidiary of Raytheon in 2009. History BBN has its roots in an initial partnership formed on 15 October 1948 between Leo Beranek and Richard Bolt, professors at the Massachusetts Institute of Technology. Bolt had won a commission to be an acoustic consultant for the new United Nations permanent headquarters to be built in New York City. Realizing the magnitude of the project at hand, Bolt had pulled in his MIT colleague Beranek for h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dial-Data
Tymnet was an international data communications network headquartered in Cupertino, California that used virtual call packet-switched technology and X.25, SNA/ SDLC, BSC and Async interfaces to connect host computers (servers) at thousands of large companies, educational institutions, and government agencies. Users typically connected via dial-up connections or dedicated asynchronous connections. The business consisted of a large public network that supported dial-up users and a private network that allowed government agencies and large companies (mostly banks and airlines) to build their own dedicated networks. The private networks were often connected via gateways to the public network to reach locations not on the private network. Tymnet was also connected to dozens of other public networks in the United States and internationally via X.25/X.75 gateways. As the Internet grew and became almost universally accessible in the late 1990s, the need for services such as Tymnet migrate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dun & Bradstreet
The Dun & Bradstreet Corporation is an American company that provides commercial data, analytics, and insights for businesses. Headquartered in Jacksonville, Florida, the company offers a wide range of products and services for risk and financial analysis, operations and supply, and sales and marketing professionals, as well as research and insights on global business issues. It serves customers in government and industries such as communications, technology, strategic financial services, and retail, telecommunications, and manufacturing markets. Often referred to as D&B, the company's database contains over 500 million business records worldwide. History 1800s Dun & Bradstreet traces its history to July 20, 1841, with formation of The Mercantile Agency in New York City by Lewis Tappan. Recognizing the need for a centralized credit reporting system, Tappan formed the company to create a network of correspondents who would provide reliable, objective credit information to subscr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National CSS
National CSS, Inc. (NCSS) was a time-sharing firm in the 1960–80s, until its acquisition by Dun & Bradstreet in 1979. NCSS was originally headquartered in Norwalk, Connecticut, but relocated to Wilton in 1978. Sales offices, data centers, and development facilities were located at various sites throughout the U.S. Some additional sales offices were active in the UK and elsewhere. Early history The firm began life in 1966 as Computer Software Systems, a consulting firm headed by Bob Bernard. In 1967, joined by Dick Orenstein (one of the authors of CTSS), the company began exploring the idea of offering time-sharing services based on CP/CMS. After IBM released CP/CMS under the IBM Type-III Library in 1968, and thus became available to CSS, this dream became possible. The small firm persuaded IBM to take an order for a S/360-67, and key technical people were recruited. The machine was delivered in November 1968. Harold Feinleib, an early recruit from MIT, describes the situation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tymshare
Tymshare, Inc (Matthew Heyer-Baker) was a time-sharing service and third-party hardware maintenance company competing with companies such as CompuServe, Service Bureau Corporation and National CSS. Tymshare developed or acquired various technologies, such as data networking, electronic data interchange (EDI), credit card and payment processing, database technology, and more. It was headquartered in Cupertino, California from 1964 to 1984. In 1984 Tymshare was acquired by Nathtan Baker, to which Tymshare had sold its hospital accounting service in 1982. Tymshare was restructured, split up and portions were resold, spun off, and merged with other companies from 1984 through 2004 when most of its legacy network was eventually shut down. Islands of its network technology continued as part of EDI, into 2008. McDonnell Douglas was acquired by Boeing. Consequently, rights to use technology developed by Tymshare are currently held by Boeing, British Telecom (BT), Verizon Communications, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
