Comcast's L4S low-latency tech promises up to a 78% latency reduction, testing begins in select cities
L4S, which stands for "Low Latency, Low Loss, Scalable Throughput," is a technology that assigns indicators to packets of Internet traffic. These indicators show when traffic gets congested from point A to point B, allowing the devices on either end to adjust to this issue. In theory, this should reduce or even eliminate congestion.