---
title: "What is L4S in the context of streaming?"
url: https://ireplay.tv/video-streaming-definitions/what-is-l4s-low-latency-low-loss-scalable-throughput/
markdown_url: https://ireplay.tv/video-streaming-definitions/what-is-l4s-low-latency-low-loss-scalable-throughput.md
description: "L4S (Low Latency, Low Loss, Scalable throughput) cuts queuing delay in internet packet delivery through active queue management, keeping latency low even under network congestion. Recognised in industry standards and part of UNEXT."
type: glossary-definition
site: iReplay.tv
author: "Sylvain Corvaisier"
date_published: 2025-02-12T07:04:02+01:00
date_modified: 2025-02-12T07:04:02+01:00
language: en
keywords:
  - "low latency delay packet network loss webrtc buffer buffering congestion"
---

# What is L4S in the context of streaming?

L4S stands for Low Latency, Low Loss, Scalable throughput. It is a technology that significantly reduces latency in internet packet delivery, targeting improvements in queuing delay by managing queues with active queue management techniques. It's intended to support a range of real-time applications by ensuring consistently low latency even during network congestion. L4S has been recognized in industry standards and is a component of UNEXT, aiming to create a more interactive, self-managing network system.

---

Source: [What is L4S in the context of streaming?](https://ireplay.tv/video-streaming-definitions/what-is-l4s-low-latency-low-loss-scalable-throughput/) on iReplay.tv. Free to quote and cite with attribution and a link to the source URL.
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