Which of the following statements is true according to QoS basics?

• A. QoS allows you to control bandwidth.
• B. QoS can automatically detect and remove malware.
• C. QoS can act as a firewall.
• D. QoS can render IPv6 obsolete.

Answer: (A)

Quality of Service basics focus on managing network performance by prioritizing certain traffic and controlling how much bandwidth different applications can use. By classifying traffic (such as voice or video versus bulk data) and applying appropriate queuing and bandwidth allocation, QoS ensures that high-priority applications get the bandwidth they need and networks don’t become congested. That’s why the statement about controlling bandwidth is the true reflection of QoS concepts.

QoS does not detect or remove malware—that’s the realm of security tools like antivirus software or IDS/IPS. It also isn’t a firewall, which inspects and filters traffic based on security rules. And it doesn’t make IPv6 obsolete; QoS operates over networks using IPv4 or IPv6, helping manage performance regardless of the IP version.