<h1 id="transportlayer">Transportlayer<a aria-hidden="true" class="anchor-heading icon-link" href="#transportlayer"></a></h1>
<h1 id="transport-layer">transport layer<a aria-hidden="true" class="anchor-heading icon-link" href="#transport-layer"></a></h1>
<p>tcp/udp</p>
<ul>
<li>end-to-end, broke whole messages to segments</li>
<li>connection-oriented service: reliable delivery, error detection, congestion control, flow control</li>
<li>connectionless service: best effort delivery</li>
</ul>
<p><img src="/assets/images/2021-03-25-16-41-46.png"></p>
<ul>
<li>mission: <strong>Logical</strong> connection, between applications running on different hosts</li>
<li>Logical communication = as if the applications were directly connected
<ul>
<li>scope: between applications</li>
<li>addressing mechanism: multiplex, port numbers bound to an application, 16-bit unsigned number</li>
<li>data types: segment</li>
</ul>
</li>
<li>responsibilities: 
<ul>
<li><strong>multiplex</strong> messages/de..  end host run <strong>mulitple</strong> applications -> addressing</li>
<li>break data to segments and re-assembly
<ul>
<li>segmentation, broken into segments</li>
</ul>
</li>
<li>connection setup and state management and tear down</li>
<li>TCP: reliability guarantee</li>
<li>Transport layer adds header with additional information (port numbers, ...)</li>
</ul>
</li>
</ul>
<hr>
<strong>Children</strong>
<ol>
<li><a href="/notes/29ec6e3f-8b45-44b1-95c0-69042790897a">Tcp</a></li>
<li><a href="/notes/9717a6f8-21da-477c-9258-5c53ec050f27">Udp</a></li>
</ol>
<hr>
<strong>Backlinks</strong>
<ul>
<li><a href="/notes/92917ea3-452e-48dc-875e-5cd0002041db">Network (my_note)</a></li>
</ul>