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Summary

Course information

Network: nodes -> interconnected

Protocol: format and the order of messages exchanged, as well as the actions taken

Internet: The past:

started as ARPANET: late 1960s

initial link bandwidth: 50 kbps

number of hosts: 4

Internet: Current:

number of hosts: grows  at an exponential speed

                              July 2002 was about 162 millions

backbone speed: 10 Gbps

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