BIT 4554 Lecture Notes - Lecture 3: Packet Loss, Arpanet, Darpa
27 Jan 2017
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Document Summary
Sharing centralized facilities leads to fully distributed information systems. Resource sharing was the main motivation behind early computer networks. 1960s - department of defense for advanced research projects. Agency (arpa) became interested in finding ways to share resources. Researchers needed powerful computers to interconnect all computers with a network and devise software to allow a researcher to use whichever computer was best suited to perform a given task. Arpanet was the prototype for the eventual internet. Since 2007, more than 2 computers added to the internet per second. Estimates based on analyses by automated tools which probe computer addresses stored in large on-line databases (dns) Ping - sends message that is echoed by some remote computer. Trace route - reports path to remote computer. 1. communication speeds increased dramatically: new applications arose that appealed to a broad cross-section of society higher communication speeds enabled applications to transfer large volumes of data quickly.
