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<!DOCTYPE html>
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<title>Chapter 3: Internetworking — Computer Networks: A Systems Approach Version 6.1-dev documentation</title>
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<p class="caption"><span class="caption-text">Table of Contents</span></p>
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<li class="toctree-l1"><a class="reference internal" href="preface.html">Preface</a></li>
<li class="toctree-l1"><a class="reference internal" href="foundation.html">Chapter 1: Foundation</a></li>
<li class="toctree-l1"><a class="reference internal" href="direct.html">Chapter 2: Direct Links</a></li>
<li class="toctree-l1 current"><a class="current reference internal" href="#">Chapter 3: Internetworking</a><ul>
<li class="toctree-l2"><a class="reference internal" href="internetworking/problem.html">Problem: Not All Networks are Directly Connected</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/switching.html">3.1 Switching and Bridging</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/basic-ip.html">3.2 Basic Interworking</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/routing.html">3.3 Routing</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/impl.html">3.4 Implementation</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/trend.html">Perspective: Virtual Networks All the Way Down</a></li>
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<li class="toctree-l1"><a class="reference internal" href="scaling.html">Chapter 4: Advanced Internetworking</a></li>
<li class="toctree-l1"><a class="reference internal" href="e2e.html">Chapter 5: End-to-End Protocols</a></li>
<li class="toctree-l1"><a class="reference internal" href="congestion.html">Chapter 6: Congestion Control</a></li>
<li class="toctree-l1"><a class="reference internal" href="data.html">Chapter 7: End-to-End Data</a></li>
<li class="toctree-l1"><a class="reference internal" href="security.html">Chapter 8: Network Security</a></li>
<li class="toctree-l1"><a class="reference internal" href="applications.html">Chapter 9: Applications</a></li>
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<h1>Chapter 3: Internetworking<a class="headerlink" href="#chapter-3-internetworking" title="Permalink to this headline">¶</a></h1>
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<div><p>Nature seems … to reach many of her ends by long circuitous routes.</p>
<p><em>—Rudolph Lotze</em></p>
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<li class="toctree-l1"><a class="reference internal" href="internetworking/problem.html">Problem: Not All Networks are Directly Connected</a></li>
<li class="toctree-l1"><a class="reference internal" href="internetworking/switching.html">3.1 Switching and Bridging</a><ul>
<li class="toctree-l2"><a class="reference internal" href="internetworking/switching.html#datagrams">Datagrams</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/switching.html#virtual-circuit-switching">Virtual Circuit Switching</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/switching.html#source-routing">Source Routing</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/switching.html#l2-switches-and-bridges">L2 Switches and Bridges</a></li>
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<li class="toctree-l1"><a class="reference internal" href="internetworking/basic-ip.html">3.2 Basic Interworking</a><ul>
<li class="toctree-l2"><a class="reference internal" href="internetworking/basic-ip.html#what-is-an-internetwork">What Is an Internetwork?</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/basic-ip.html#service-model">Service Model</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/basic-ip.html#global-addresses">Global Addresses</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/basic-ip.html#datagram-forwarding-in-ip">Datagram Forwarding in IP</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/basic-ip.html#subnetting-and-classless-addressing">Subnetting and Classless Addressing</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/basic-ip.html#address-translation-arp">Address Translation (ARP)</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/basic-ip.html#host-configuration-dhcp">Host Configuration (DHCP)</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/basic-ip.html#error-reporting-icmp">Error Reporting (ICMP)</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/basic-ip.html#virtual-networks-and-tunnels">Virtual Networks and Tunnels</a></li>
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<li class="toctree-l1"><a class="reference internal" href="internetworking/routing.html">3.3 Routing</a><ul>
<li class="toctree-l2"><a class="reference internal" href="internetworking/routing.html#network-as-a-graph">Network as a Graph</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/routing.html#distance-vector-rip">Distance-Vector (RIP)</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/routing.html#link-state-ospf">Link State (OSPF)</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/routing.html#metrics">Metrics</a></li>
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<li class="toctree-l1"><a class="reference internal" href="internetworking/impl.html">3.4 Implementation</a><ul>
<li class="toctree-l2"><a class="reference internal" href="internetworking/impl.html#software-switch">Software Switch</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/impl.html#hardware-switch">Hardware Switch</a></li>
<li class="toctree-l2"><a class="reference internal" href="internetworking/impl.html#software-defined-networks">Software Defined Networks</a></li>
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<li class="toctree-l1"><a class="reference internal" href="internetworking/trend.html">Perspective: Virtual Networks All the Way Down</a></li>
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