title: What is the meaning of "per route basis" in PoolingClientConnectionManager?
body: <p><a href="http://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/org/apache/http/impl/conn/tsccm/ThreadSafeClientConnManager.html" rel="noreferrer">ThreadSafeClientConnManager</a> is deprecated and a new method is introduced <a href="http://hc.apache.org/httpcomponents-client-ga/httpclient/apidocs/org/apache/http/impl/conn/PoolingClientConnectionManager.html" rel="noreferrer">PoolingClientConnectionManager</a>.</p>
  
  <p>The documentation of PoolingClientConnectionManager says </p>
  
  <blockquote>
    <p>Manages a pool of client connections and is able to service connection
    requests from multiple execution threads. Connections are pooled on a
    per route basis.</p>
  </blockquote>
  
  <p><strong>My Question</strong></p>
  
  <p>What is the meaning of <em>per route basis</em> here?</p>