8 - Internet

8 - Internet - Chapter9 TheEvolving Internet Slide 1...

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Chapter 9 The Evolving  Internet  Slide 1 (Cartoon by Peter Steiner. The New Yorker, July 5, 1993 issue [Vol.69 no. 20] page 61)
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   Inside the Internet Counting Connections The Internet: an interconnected network of  thousands of networks  Links academic, research, government, and  commercial institutions Connects computers to about every country  in the world  Growing too fast to measure its growth Internet is decentralized Internet doesn’t have hard boundaries Slide 2
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Internet Protocols Transmission Control Protocol/Internet  Protocol, TCP/IP… At the heart of the Internet Allows cross-network communication TCP breaks messages into packets. Each packet has all the information needed to  travel from network to network. Host systems called routers determine how to  route transmissions. Packet-switching is flexible and robust. Slide 4
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Internet Protocols IP is the address for the packets. Each Internet host computer has a unique IP  address.  Each address is comprised of four sets of  numbers separated by periods, such as  123.23.168.22. Each set of numbers is called an octet. 4.3 billion possible combinations Slide 5
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Internet Addresses The host is named using DNS (domain name  system), which translates IP addresses into a  string of names. The Internet utilizes DNS servers to translate 
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8 - Internet - Chapter9 TheEvolving Internet Slide 1...

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