Wireshark/Ethereal Retransmission

10 pts.
Tags:
Cabling
Ethereal
Network Packet
Wireshark
Can anyone explain the mechanisms for retransmission and fast retransmission in wireshark/ethereal?

Software/Hardware used:
Wireshark

Answer Wiki

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Per the <a href=”http://wiki.wireshark.org/TCP_Analyze_Sequence_Numbers”>Wireshark wiki</a>:

TCP Retransmission – Occurs when all the data in the packet has been seen in one or more previous packets.

TCP Fast Retransmission – Occurs when the sender retransmits a packet before the expiration of the acknowledgement timer. Senders should Fast Retransmit upon receipt of 3 duplicate ACKs.

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