title: MAC address of source and destination field in a packet
body: <p>I was always curious about the following:</p>
  
  <p>suppose that there is a PC connected to the Switch A which is again connected to the Router B. This router is again connected to the Router C. Now, the Router C is connected to the Switch D, which is connected to the Server E.</p>
  
  <p>So, if the PC sends a packet that has destination as Server E, what will be the MAC address area of the destination and source field in the packet?</p>