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<h1>Introduction<a class="headerlink" href="#introduction" title="Permalink to this headline">ΒΆ</a></h1>
<p>Traffic Control is a control plane for a CDN, which includes all of the components mentioned in the CDN Basics section, except for the Log File Analysis System. The caching software chosen for Traffic Control is <a class="reference external" href="http://trafficserver.apache.org/">Apache Traffic Server</a> (ATS). Although the current release only supports ATS as a cache, this may change with future releases.</p>
<p>Traffic Control was first developed at Comcast for internal use and released to Open Source in April of 2015.</p>
<p>Traffic Control implements the blue boxes in the architecture diagram below.</p>
<img alt="../_images/traffic_control_overview_3.png" class="align-center" src="../_images/traffic_control_overview_3.png" />
<p>In the next sections each of these components will be explained further.</p>
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