19What type of network traffic requires QoS?wikiemailon-line purchasingvideo conferencing

To understand what type of network traffic requires Quality of Service (QoS), we need to look at the characteristics of different types of network traffic and their sensitivity to latency, jitter, and packet loss.

1. Definition of QoS: Quality of Service refers to the control and management of the transmission of data across a network to ensure optimal performance for certain types of data types.

2. Types of Network Traffic:

   • Email: Email is typically not sensitive to delays. It can tolerate higher latencies largely due to its nature of being non-real-time communication.
   • Online Purchasing: While this traffic is important, it generally can handle delays and is less time-sensitive than other traffic types. Thus, it does not require strict QoS.
   • Video Conferencing: This type of traffic is highly sensitive to latency, jitter, and packet loss. Real-time communication demands a consistent flow of data to maintain audio and visual quality, making it a prime candidate for QoS.

3. Conclusion: Out of the options provided, video conferencing is the type of network traffic that requires QoS to function effectively, ensuring that calls are clear, stable, and uninterrupted.

In summary, QoS is critical for video conferencing due to its real-time requirements, whereas email and online purchasing can tolerate more variability in network performance without a significant impact.