Cheatsheet: Difference between revisions
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* Both consider RTO and Duplicate ACKs as packet loss events.
* Behavior of Tahoe and Reno differ primarily in how they react to duplicate ACKs.
Reno:
If three duplicate ACKs are received, Reno will
Skip the slow start phase by instead halving the congestion window (instead of setting it to 1 MSS like Tahoe),
Setting the slow start threshold equal to the new congestion window
Line 250 ⟶ 244:
* In both Tahoe and Reno, if an ACK times out (RTO timeout), slow start is used, and both algorithms reduce congestion window to 1 MSS.
* Four ACKs acknowledging the same packet, which are not piggybacked on data and do not change the receiver's advertised window.
{| class="wikitable"
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! Event !! Tahoe !! Reno
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| 3 Dup Acks || performs a fast retransmit<br> Sets the slow start threshold to half of the current congestion window<br>Reduces the congestion window to 1 MSS<br>Resets to slow start state|| perform a fast retransmit
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| RTOs || Example || Example
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| Example || Example || Example
|}
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