title: How long is an established SSL connection valid?
body: <p>Suppose I am sending &quot;hello&quot; to an api over ssl. My understanding is there would be a symmetric key exchange established over ssl and then the message &quot;hello&quot; will be encrypted using that symmetric key and sent over to the other server.</p>
  <p>Now my question is, the next time I send a &quot;hello 2&quot;, does the symmetric key exchange happen again? My guess would be that if it's a persistent connection, there would be no need for the key exchange again. Can someone confirm?</p>