title: Computer networking: During what transmission round is the 70th segment sent?
body: <p>While practicing some exercises I came across the following exercises that I just can't wrap my head around. Looking at the solution, I don't get how they reach to the conclusion that packet 32 to 63 are sent in the 6th transmission round. How was 63 computed?</p>
  
  <p><a href="https://i.stack.imgur.com/R4GSU.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/R4GSU.png" alt="enter image description here"></a></p>
  
  <p><strong>During what transmission round is the 70th segment sent?</strong></p>
  
  <p><strong>Solution:</strong> </p>
  
  <pre><code>During the 1st transmission round, packet 1 is sent; 
  packet 2-3 are sent in the 2nd transmission round; 
  packets 4-7 are sent in the 3rd transmission round; 
  packets 8-15 are sent in the 4th transmission round;
  packets 16 to 31 are sent in the 5th transmission round; 
  packets 32 to 63 are sent in the 6th transmission round; 
  packets 64 to 96 are sent in the 7th transmission round. 
  Thus packet 70 is sent in the 7th transmission round.
  </code></pre>