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BDC5eChapter8 - Chapter 8 Internet Operation Business Data...

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Chapter 8: Internet Operation Business Data Communications, 5e
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Network Classes Class A: Few networks, each with many hosts All addresses begin with binary 0 Class B: Medium networks, medium hosts All addresses begin with binary 10 Class C: Many networks, each with few hosts All addresses begin with binary 11
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Internet Addressing 32-bit global internet address Includes network and host identifiers Dotted decimal notation 11000000 11100100 00010001 00111001 (binary) 192.228.17.57 (decimal)
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Subnets & Subnet Masks Allows for subdivision of internets within an organization Each LAN can have a subnet number, allowing routing among networks Host portion is partitioned into subnet and host numbers
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Subnet Mask Calculations
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Internet Routing Protocols Responsible for receiving and forwarding packets between interconnected networks Must dynamically adapt to changing network conditions Two key concepts Routing information Routing algorithm
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Autonomous Systems Key characteristics Set of routers and networks managed by single organization group of routers exchanging information via a common routing protocol connected (in a graph-theoretic sense); that is, there is a path between any pair of nodes Interior Router Protocol (IRP) passes information between routers in an AP Exterior Router Protocol (ERP) passes information between routers in different Aps
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Border Grouping Protocol (BGP) Preferred ERP for the Internet Three functional procedures Neighbor acquisition Neighbor reachability Network reachability
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