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Allow rate limiting of Version Negotiation #1891

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5 changes: 5 additions & 0 deletions draft-ietf-quic-transport.md
Expand Up @@ -1105,6 +1105,11 @@ retaining state. Though either the Initial packet or the Version Negotiation
packet that is sent in response could be lost, the client will send new packets
until it successfully receives a response or it abandons the connection attempt.

A server MAY limit the number of Version Negotiation packets it sends. For
instance, a server that is able to recognize packets as 0-RTT might choose not
to send Version Negotiation packets in response to 0-RTT packets with the
expectation that it will eventually receive an Initial packet.


## Handling Version Negotiation Packets {#handle-vn}

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