title: When to use -ComputerName and when -ConnectionUri?
body: <p>In my quest of learning PowerShell I stumbled across something that confuse me.
  I don't really understand why sometime I have to use</p>
  
  <pre><code>New-PSSession -ComputerName "servername" 
  </code></pre>
  
  <p>and sometime instead</p>
  
  <pre><code>New-PSSession -ConnectionUri "http://FQDN/powershell" etc...
  </code></pre>
  
  <p>I couldn't find a clear explanation of the two approaches. What is exactly the difference?</p>