HTTP persistent connection, client-server connection schema
<a href="//commons.wikimedia.org/wiki/User:Helix84" title="User:Helix84">helix84</a>
2006-10-31
own work, based on <a rel="nofollow" class="external autonumber" href="http://www.dcs.bbk.ac.uk/~ptw/teaching/http/notes.html">[1]</a>