From: sangitachowdhary@gmail.com   
      
   Hi,   
      
   I have one question related to TCP keepalive timer. If keepalive timer   
   expires, then we send a probe packet, and client respond with ack. I want to   
   know where this ACK is processed.   
      
   When we get ack for probe packet, we reset the timer. Where resetting of timer   
   has been done?   
      
   When we get ACK for probe packet, do we increase the congestion window?   
   Looking forward to your response.   
      
   Regards,   
   Sangeeta   
      
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