title: What is the difference between packet and payload
body: <p>I got this defitiniton below is it true and what is the difference between packet and payload?</p>
  
  <p>The ESP (Encapsulation Security Payload) protocol is a member of IPSec suite. Its
      purpose is to guarantee payload's (message) integrity, data origin authentication of IP
      packets and confidentially of the payload.
      It does provide protection for the entire packet, not only to the payload.</p>