Prague Link

: As of April 2026, it remains an active Internet-Draft within the IETF, with reference implementations available for Linux (TCP) and Apple (QUIC). 2. Prague, Czech Republic: Travel & Culture

: Implements a "virtual RTT" to prevent flows with very low Round-Trip Times from dominating others. Prague

: Sources must set the ECT(1) codepoint in the IP header to identify as L4S-capable. : As of April 2026, it remains an

The is a scalable congestion control mechanism designed for the L4S (Low Latency, Low Loss, and Scalable Throughput) architecture. : Sources must set the ECT(1) codepoint in

: To maintain consistently low queuing delay (on the order of milliseconds) while fully utilizing network capacity. Key Features :

: Requires a more granular feedback mechanism than standard TCP to react to the extent of congestion rather than just its existence .