Answer-What is 'QoS' (Quality of Service) in networking?

QoS classifies and prioritizes network traffic to ensure critical applications receive sufficient bandwidth and low latency. Techniques traffic classification DSCP markings, queuing priority queuing, weighted fair queuing, traffic shaping, and policing. In banks, QoS ensures that core banking transactions RTGS, NEFT, CBS get higher priority than email or web browsing on the same network link. Without QoS, a large file download could saturate a branch WAN link and delay transaction processing.