9781423901402_PPT_Ch14 - Information Technology in Theory...

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Chapter 14 Internet Architecture Information Technology in Theory By Pelin Aksoy and Laura DeNardis
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2 Objectives Become familiar with important Internet technology milestones Understand fundamental Internet architectural features such as Internet exchange points, the Domain Name System, IP addresses, and Uniform Resource Locators Understand the technology underlying popular Internet applications Information Technology in Theory
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3 Objectives (continued) Examine the centralized administrative functions that keep the Internet running, including management of domain names and Internet addresses Contemplate economic and social issues associated with the Internet Information Technology in Theory
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4 Internet History The cold war Launch of Sputnik in 1957 ARPA founded within the Department of Defense (DoD) ARPANET Packet switching by Paul Baran TCP/IP by Vinton Cerf and Robert Kahn The World Wide Web Information Technology in Theory
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5 Internet History (continued) Web browser Mosaic by Marc Andreessen Wireless access Etc. Information Technology in Theory
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6 Internet History (continued) Information Technology in Theory
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7 Internet Architectural Components The Internet includes the following important technological systems and components: Internet backbone and routers Internet exchange points (IXPs) The Internet Protocol (IP) The Domain Name System (DNS) Uniform Resource Locators (URLs) Information Technology in Theory
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8 Internet Backbone and Routers Internet backbone : the global collection of high- capacity trunks Is not owned and operated by any single company or government Rather, it is a collection of high-speed, interconnected networks run by large network service providers such as AT&T, British Telecom, France Telecom, Qwest, and Verizon, etc. Information Technology in Theory
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9 Internet Backbone and Routers (continued) The foundation of the Internet’s architecture is an enormous number of routers The router reads the destination IP address and uses a routing table to look up information for how to forward the packet A routing table is essentially a database on the router that provides information for how destinations can be reached most efficiently Information Technology in Theory
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10 Internet Backbone and Routers (continued) The routers in one service provider’s networks can communicate with routers in other such networks because they adhere to the same routing protocols These protocols enable routers to share network changes that are reflected in updates to router tables An example of a routing protocol that provides this service is Border Gateway Protocol (BGP) Information Technology in Theory
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11 Internet Backbone and Routers (continued) Information Technology in Theory
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12 Internet Exchange Points Traffic from one network flows seamlessly to other networks across the Internet through interconnection locations called Internet exchange points
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9781423901402_PPT_Ch14 - Information Technology in Theory...

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