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Flow PowerPoint Presentation

Flow

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Flow

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  1. Internet Flow Data Andrew Touchstone ISDS 4120 Assignment 1 Kari Walters

  2. URL User types URL in Internet browser

  3. OSI Model (see notes below) Each Computer has: IP Customer Computer (Client) Application Layer: provides tool for programs to use to access the network (and the lower layers) Internet Service Provider (ISP) MACAddress Given by NIC card Presentation Layer: (encryption) hides the differences among variouscomputer systems Each subscriber has an uniqueIPassigned by ISP Computer is connected to an Internet Service Provider (ISP) SessionLayer: manages connections between machines Also known as hardware/physical address IPAddress Transport Layer: breaks data down into manageable chunks DHCPserver assigns IP to clients on network (not unique) URL is sent to DNS Server DNS Server returns IP Address Network Layer: moves packets between computers on different networks IP Data Link Layer: identifies devices on the Physical layer Physical Layer: hardware and turns binary code into pulses

  4. Internet WAN – Wide Area Networks LAN – Local Area Networks IP enters switches/routersto be directed to web server IP Internet: an electronic communications network that connects networks and organizational computer facilities around the world -http://www.merriam-webster.com/dictionary/internet Switch – a device that filters and forwardstraffic based on some criteria. A bridge and a router are both switches IP

  5. OSI Model (return of webpage to user) YourCompany.comServer IP finds specific port Server returns webpage using Application Layer: provides tool for programs to use to access the network (and the lower layers) Presentation Layer: (encryption) hides the differences among variouscomputer systems TCP/IP – a set of communication protocols developed by the U.S. Department of Defense that enables dissimilar computers to share information over a network HTTP – extremely fast protocol used for network file transfers on the World Wide Web SessionLayer: manages connections between machines IP Transport Layer: breaks data down into manageable chunks Network Layer: moves packets between computers on different networks Data Link Layer: identifies devices on the Physical layer Physical Layer: hardware and turns binary code into pulses

  6. The End