What Type of Network Traffic Requires QoS?

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Are you interested in knowing the answer to what type of network traffic requires QoS? If so, then you are on the right page. Feel relaxed and make sure you read the post to the end.

what type of network traffic requires QoS

What is QoS in Networking?

Quality of service (QoS) is the use of mechanisms or technologies that work on a network to control traffic and ensure the performance of critical applications with limited network capacity. It enables organizations to adjust their overall network traffic by prioritizing specific high-performance applications.

QoS is typically applied to networks that carry traffic for resource-intensive systems. Common services for which it is required include internet protocol television (IPTV), online gaming, streaming media, videoconferencing, video on demand (VOD), and Voice over IP (VoIP).

Using QoS in networking, organizations have the ability to optimize the performance of multiple applications on their network and gain visibility into the bit rate, delay, jitter, and packet rate of their network. This ensures they can engineer the traffic on their network and change the way that packets are routed to the internet or other networks to avoid transmission delay. This also ensures that the organization achieves the expected service quality for applications and delivers expected user experiences.

As per the QoS meaning, the key goal is to enable networks and organizations to prioritize traffic, which includes offering dedicated bandwidth, controlled jitter, and lower latency. The technologies used to ensure this are vital to enhancing the performance of business applications, wide-area networks (WANs), and service provider networks.
How Does QoS Work?


QoS networking technology works by marking packets to identify service types, then configuring routers to create separate virtual queues for each application, based on their priority. As a result, bandwidth is reserved for critical applications or websites that have been assigned priority access.

QoS technologies provide capacity and handling allocation to specific flows in network traffic. This enables the network administrator to assign the order in which packets are handled and provide the appropriate amount of bandwidth to each application or traffic flow.
Types of Network Traffic

Understanding how QoS network software works is reliant on defining the various types of traffic that it measures. These are:

Bandwidth: The speed of a link. QoS can tell a router how to use bandwidth. For example, assigning a certain amount of bandwidth to different queues for different traffic types.
Delay: The time it takes for a packet to go from its source to its end destination. This can often be affected by queuing delay, which occurs during times of congestion and a packet waits in a queue before being transmitted. QoS enables organizations to avoid this by creating a priority queue for certain types of traffic.
Loss: The amount of data lost as a result of packet loss, which typically occurs due to network congestion. QoS enables organizations to decide which packets to drop in this event.
Jitter: The irregular speed of packets on a network as a result of congestion, which can result in packets arriving late and out of sequence. This can cause distortion or gaps in audio and video being delivered.


After understanding and knowing the meaning of QoS networking let look at the importance of the QoS networking.

Why is QoS Important?

Traditional business networks operated as separate entities. Phone calls and teleconferences were handled by one network, while laptops, desktops, servers and other devices connected to another. They rarely crossed paths, unless a computer used a telephone line to access the internet.

When networks only carried data, speed was not overly critical. But now, interactive applications carrying audio and video content need to be delivered at high speed, without packet loss or variations in delivery speed.

What Type of Network Traffic Requires QoS?

QoS is particularly important to guarantee the high performance of critical applications that require high bandwidth for real-time traffic. For example, it helps businesses to prioritize the performance of “inelastic” applications that often have minimum bandwidth requirements, maximum latency limits, and high sensitivity to jitter and latency, such as VoIP and videoconferencing.

QoS helps businesses prevent the delay of these sensitive applications, ensuring they perform to the level that users require. For example, lost packets could cause a delay to the stream, which results in the sound and video quality of a videoconference call to become choppy and indecipherable.

QoS is increasingly important as network performance requirements adapt to the growing number of people using them. The latest online applications and services require vast amounts of bandwidth and network performance, and users demand they offer high performance at all times. Organizations, therefore, need to deploy techniques and technologies that guarantee the best possible service.


QoS is also becoming increasingly important as the Internet of Things (IoT) continues to come to maturity. For example, in the manufacturing sector, machines now leverage networks to provide real-time status updates on any potential issues. Therefore, any delay in feedback could cause highly costly mistakes in IoT networking. QoS enables the data stream to take priority in the network and ensures that the information flows as quickly as possible.

Cities are now filled with smart sensors that are vital to running large-scale IoT projects such as smart buildings. The data collected and analyzed, such as humidity and temperature data, is often highly time-sensitive and needs to be identified, marked, and queued appropriately.

What Type of Network Traffic Requires QoS?

  • email
  • on-line purchasing
  • video conferencing
  • wiki

The correct answer is: video conferencing


Explanation: Real-time audio and video communications are used in video conferencing. Both of these types of communication are time-sensitive and bandwidth-intensive, necessitating the presence of quality of service on the network. QoS will guarantee a consistent user experience.

Answers Explanation & Hints: 

Video conferencing utilizes real-time audio and video communications. Both of these are time-sensitive and bandwidth-intensive forms of communication that require quality of service to be active on the network. QoS will ensure an uninterrupted user experience.

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