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| Detecting
Packet Loss Using Dupacks |
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| Fast Retransmit Mechanism |
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| n | Dupacks
may be generated due to |
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| – | packet
loss, or |
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| – | out-of-order
packet delivery |
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| n | TCP
sender assumes that a packet loss has |
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| occurred
if it receives three dupacks |
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| consecutively |
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