Day 26 – Quality of Service (QoS): Prioritizing Critical Network Traffic | networking in 30 days

In Day 26 of our networking series, we dive into Quality of Service (QoS) — the set of techniques used to manage and prioritize different types of network traffic. Not all traffic is equally important: a VoIP call or online game is far more sensitive to delay than an email or file download.

In this lesson, you’ll learn:

Why traditional “best-effort” networking is not enough.

The core metrics of QoS: bandwidth, latency, jitter, and packet loss.

Which applications need higher QoS (VoIP, video conferencing, gaming) vs. those that can tolerate delay (email, downloads).

How QoS works through classification & marking, queuing & scheduling, and congestion avoidance.

Real-world examples of QoS in action, from home routers to enterprise networks.

By the end of this session, you’ll understand how QoS ensures a smoother user experience, even when networks are congested.


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