The Internet :The Internet How did the internet develop?


How did the internet develop? :How did the internet develop? The internet as we know it today is actually a very large wide area network (WAN) connecting computers and networks around the world. It makes it possible for millions of computer users to connect to one another via telephone lines, cable lines, and statellites


Internet was “born” in the late 1960s :Internet was “born” in the late 1960s Advanced Research Projects Agency (ARPA) or the US Department of Defense linked together mainframe computers to form a communications network.


The Agency’s main objectives :The Agency’s main objectives Create a communication system that could survive a nuclear attack or natural disaster Provide communication links to its users in remote locations


ARPANet :ARPANet Early version of the internet was known as ARPANet Backbone Is a term used to describe a structure that handles the major traffic in a networked system– much like a major highway Network Backbone is a “cyberspace highway” made up of high-speed cables and switching stations


internetworking :internetworking The process of linking a collection of networks is called internetworking This term is where the internet got its name The term internet was officially adopted in 1983. More commonly referred to as the Net


ARPANet :ARPANet Users originally used the internet to share Scientific and engineering information Other uses discovered Email most popular Expansion into Europe in 1970s


ARPANet splits into two parts :ARPANet splits into two parts ARPANet and MILNet MILNet Various defence agencies and the military ARPANet Research and development network International communication tool for the academic community


Mid 1980s :Mid 1980s Speed of ARPANet backbone no longer sufficient National Science Foundation (NSF) created a new high-speed network NSFNet


NSFNet :NSFNet Two main objectives To interconnect supercomputing centres so they could access one another’s recources To give academic and research centres access to one another for purposes of exchanging information


ARPANet and NSFNet :ARPANet and NSFNet Linked together but NSFNet had a faster backbone By early 1990s NSFNet fully replaced ARPANet


Growth of Internet :Growth of Internet Fueled by purchase of personal computers Growing demand for “anytime, anywhere” NSFNet academics only Bell, AT&T and Nortel built high-speed backbones and new networks that used the same protocols


TCP/IP (Transmission Control Protocol/Internet Protocol :TCP/IP (Transmission Control Protocol/Internet Protocol Accepted means of communication Protocol Is an agreed upon format for transmitting data between two or more devices A set of formal rules for transmitting data


TCIP/IP :TCIP/IP Available for free Rapid growth of the internet Set up internet accounts with telecommunications companies and Internet service providers (ISPs) Internet - most popular use Email and file sharing