CompTIA Cloud+ Practice Test

What is a benefit of using QoS in a network?

1. It prioritizes critical traffic during congestion.

2. It increases overall network speed.

3. It reduces the need for additional bandwidth.

4. It provides better security against attacks.

The correct answer is: It prioritizes critical traffic during congestion.

Using Quality of Service (QoS) in a network significantly enhances the management of data traffic by prioritizing critical traffic during times of congestion. This is especially important in environments where bandwidth is a limited resource and where various applications and services compete for that bandwidth. QoS enables network administrators to classify and prioritize traffic based on the needs of specific applications or services. For instance, voice over IP (VoIP) calls, video conferencing, and real-time data are often prioritized over less time-sensitive applications, like file downloads or streaming media. By ensuring that critical traffic experiences lower latency and reduced packet loss, QoS improves the overall performance of important applications, maintaining a consistent user experience even when the network is under strain. This functionality is essential for maintaining service levels and meeting the expectations of users who rely on timely data transmission. While other options touch on aspects of networking, they do not accurately describe the primary benefit provided by QoS. The assertion regarding increasing overall network speed is misleading, as QoS does not increase the physical speed of the network but rather optimizes the allocation of the existing bandwidth. The reduction of the need for additional bandwidth is also not a direct benefit of QoS, as it primarily focuses on traffic management rather than resource expansion. Lastly,