title: Why does Mongo open at least 5 connections?
body: <p>Using mongoose-Plugin within an node.js-app will openes more than just one connection, even if im only calling <code>mongoose.connect(...);</code> just one single time. How could that be?</p>
  
  <p>Heres my terminal output from <em>mongod</em> which proves that more than one connection are incomming</p>
  
  <pre><code>NETWORK  [initandlisten] connection accepted from 127.0.0.1:51515 #1 (1 connection now open)
  NETWORK  [initandlisten] connection accepted from 127.0.0.1:51516 #2 (2 connections now open)
  NETWORK  [initandlisten] connection accepted from 127.0.0.1:51517 #3 (3 connections now open)
  NETWORK  [initandlisten] connection accepted from 127.0.0.1:51518 #4 (4 connections now open)
  NETWORK  [initandlisten] connection accepted from 127.0.0.1:51519 #5 (5 connections now open)
  </code></pre>