Prague Instant

: 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

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

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

draft-briscoe-iccrg-prague-congestion-control-04 - IETF Datatracker : As of April 2026

The is a scalable congestion control mechanism designed for the L4S (Low Latency, Low Loss, and Scalable Throughput) architecture.

Prague is globally renowned for its history, architecture, and its foundational "draft" beer culture.

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