{HEAD ~ The browser} assembles the file one byte at a time on the users computer so that the user has a modified copy of {TAIL ~ the original file} 
{ HEAD ~ The browser } assembles the file one byte at a time on the users computer so that the user has a modified copy of { TAIL ~ the original file }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL