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To: cs551@merlot.usc.edu
Subject: Re: Lecture 24 
Date: Fri, 04 May 2007 22:16:15 -0700
From: william@bourbon.usc.edu

Someone wrote:

  > Now In lecture 24 slide 24 when we add the ACK in link layer.
  > I am not seeing any " DS" here before A sends Data. 
  > Am I interpretting it wrongly???

DS (from slide 22) is there.  It's just not repeated here.
--
Bill Cheng // bill.cheng@usc.edu <URL:http://merlot.usc.edu/william/usc/>