Networking Intermediate

What is QoS (Quality of Service)?

A set of techniques for managing network traffic to prioritize certain types of data and ensure performance for critical applications.

QoS manages bandwidth, latency, jitter, and packet loss by classifying and prioritizing traffic. Voice and video traffic get higher priority than file downloads. Techniques include traffic shaping, policing, queuing, and marking.

Common QoS mechanisms include DiffServ (packet marking), DSCP (priority codes), and traffic policing (drop excess traffic). QoS is essential in enterprise networks for VoIP, video conferencing, and real-time applications that are sensitive to delays.

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