ITM 350 Chapter 3 Notes.docx

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Ryerson University
Information Technology Management
ITM 350
Franklyn Prescod

ITM 350 Chapter 3 Notes Evolution and Applications of the Internet Introduction The internet connects uniquely numbered computing devices that relay information from point to point using Internet Protocol IP which is a protocol that uses a set of rules to send and receive messages at the internet address level The most common protocol is Transmission Control Protocol TCP which is a protocol that uses a set of rules to exchange messages with other internet points at data packet level History of the Internet The first network was called ARPANET The computers were able to communicate with any other computer on the network using an IP Address which is a method of addressing every physical device on the internet to enable any device to communicate with any other device An IP Address consists of four 8bit segments of data People could not remember the IP addresses of all devices to they created a Domain Name System which was a method of translating names into IP addresses Domain Name Services DNS are an internet site that provides a table for translating domain names into IP addresses Excom net org etc Packet Switching is a method of transmitting data by breaking it up into small segments or packets and sending the packets individually in a stream The packets are not necessarily sent together but rather are disassembled transmitted separately and then reassembled when they arrive at their destination Protocol is a special set of rules that the sending and receiving points in a telecommunication connection use when they communicate TCPIP are a set of protocols based on the Transmission Control Protocol TCP and the Internet Protocol IP The Canadian Internet The purpose of CA net was to provide internet connectivity between universities and research organizations in Canada through a unified highspeed network Internet Backbone is an organized and managed communications system often based on fibreoptic cables that forms the central connection for a section of internet Asynchronous Transfer Mode ATM is a switching technology that organizes digital data into 53byte cell units and transmits them using digital signaling technology A cell is processes asynchronously relative to other related cellsIn other words not necessarily in prespecified sequence
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