title: What's the network namespace in Linux?
body: <p>Can you tell me What's the network namespace in Linux?</p>
  
  <p>And Why need network namespace in Linux?</p>
  
  <p>In Linux network driver, I do not find any related about network namespace.</p>
  
  <p>Is it related with network protocol in Linux?</p>
  
  <p>Thanks!</p>