![]() ![]() But for User Datagram Protocol (UDP) based services like Voice over IP (VoIP) and video streaming, a steady stream of data packets is crucial. Slight variations in network parameters like jitter, packet loss, or packet delay variation (PDV) usually have only little effect on Transmission Control Protocol (TCP) based services (for example, HTTP and Simple Mail Transfer Protocol (SMTP)). PRTG can monitor the Quality of Service (QoS) in a network with dedicated QoS sensors, as well as Cisco IP service level agreement (SLA) and Cisco Class Based Quality of Service (CBQoS). PRTG Manual: Monitoring Quality of Service
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