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Chapter 6

Chapter 6. The Internet. Chapter Contents. Section A: Internet Technology Section B: Fixed Internet Access Section C: Portable and Mobile Internet Access Section D: Internet Services Section E: Internet Security. Internet Technology. Background Internet Infrastructure

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Chapter 6

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  1. Chapter 6 The Internet

  2. Chapter Contents • Section A: Internet Technology • Section B: Fixed Internet Access • Section C: Portable and Mobile Internet Access • Section D: Internet Services • Section E: Internet Security Chapter 6: The Internet

  3. Internet Technology • Background • Internet Infrastructure • Internet Protocols, Addresses, and Domains • Connection Speed Chapter 6: The Internet

  4. Background • The ARPANET, created in 1969, connected computers at UCLA, Stanford Research Institute, University of Utah, and University of California at Santa Barbara • Today, the Internet connects computers all over the globe and supplies information to people of all ages and interests • With an estimated 200 million nodes and 1 billion users, the Internet is huge Chapter 6: The Internet

  5. Background Chapter 6: The Internet

  6. Background • Today, the Internet connects computers all over the globe and supplies information to people of all ages and interests • With an estimated 200 million nodes and 1 billion users, the Internet is huge Graphical visualization of a small part of the Internet today. Chapter 6: The Internet

  7. Internet Infrastructure • The Internet is not owned or operated by any single corporation or government • The Internet backbone is a network of high-capacity communications links that provides the main routes for data traffic across the Internet • Backbone links and routers are maintained by network service providers (NSPs) • NSP equipment and links are tied together by network access points (NAPs – now IXPs) • An Internet service provider (ISP) is a company that offers Internet access to individuals, businesses, and smaller ISPs Chapter 6: The Internet

  8. Internet Infrastructure Typical ISP Equipment Chapter 6: The Internet

  9. Internet Infrastructure • To communicate with an ISP, your computer uses some type of communications device, such as a modem Chapter 6: The Internet

  10. Internet Protocols, Addresses, and Domains Chapter 6: The Internet

  11. Internet Protocols, Addresses, and Domains • A domain name is a key component of Web addresses, e-mail addresses, and addresses on the Web called URLs Chapter 6: The Internet

  12. Internet Protocols, Addresses, and Domains Chapter 6: The Internet

  13. Internet Protocols, Addresses, and Domains The first step in registering a domain name is to find out whether the name is currently in use or reserved for future use. If a domain name is not available, consider using a different top-level domain, such as biz instead of com. After you’ve found an available domain name, you can continue the registration process by filling out a simple online form. See ICANN list of registrars. Chapter 6: The Internet

  14. Connection Speed • Data travels over the Internet at an incredible speed • The elapsed time for data to make a round trip from point A to point B and back to point A is referred to as latency • Ping • Traceroute • Upstream vs. downstream speed Chapter 6: The Internet

  15. Connection Speed • When upstream speeds differ from downstream speeds, you have an asymmetric Internet connection • When upstream and downstream speeds are the same, you have a symmetric Internet connection • Internet connection options • Fixed Internet access • Portable Internet access • Mobile Internet access Chapter 6: The Internet

  16. Fixed Internet Access • Dial-up Connections • DSL, ISDN, and Dedicated Lines • Cable Internet Service • Satellite Internet Service • Fixed Wireless Service • Fixed Internet Connection Roundup Chapter 6: The Internet

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