title: What is MIME? What is it for exactly?
body: <p>I was reading an article on COMET recently I have came across many times the word MIME? I googled it found that MIME is Multipurpose Internet Mail Extension. And also i came across the sentence</p>
  
  <blockquote>
    <p>multipart/x-mixed-replace" feature of
    the MIME standard . .</p>
  </blockquote>
  
  <p>What does <strong>multipart/x-mixed-replace</strong> means in terms of MIME? And even what is MIME used for? And why?</p>