7babd35b   
   From: barmar@alum.mit.edu   
      
   In article   
   <872b8763-1670-48a6-aa2f-e1749e4cb0d1@x3g2000yqa.googlegroups.com>,   
    vl_  wrote:   
      
   > Hi,   
   > How's the TCP limit the number of retransmission attempts? What's   
   > happen when TCP runs over that limit - does the packet data get lost?   
      
   If you hit the retansmission limit, the connection is aborted.  TCP   
   assumes that the network is down or the other system has crashed.   
      
   > In general, I am trying to understand why TCP is not good choice for   
   > the links with low link availability.   
   > The way it's explained: if the link is down, TCP congestion control   
   > slows down transmission rate.   
      
   I think they're talking about the link being up, but very lossy.  TCP   
   assumes that intermittent lost packets are due to an overloaded router   
   or link in the path, so it slows down to reduce the load.   
      
   > Can someone explain why that is the problem? That would only reduce   
   > the number of retransmission attempts...   
   > Thank y   
      
   It doesn't just reduce the rate of retransmissions, it also reduces the   
   rate of original transmissions.   
      
   --   
   Barry Margolin, barmar@alum.mit.edu   
   Arlington, MA   
   *** PLEASE don't copy me on replies, I'll read them in the group ***   
      
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