What is a major benefit of using a firewall in an operating system?

A major benefit of using a firewall in an operating system is its ability to control incoming and outgoing network traffic. Firewalls serve as a barrier between your computer and the internet, allowing for the enforcement of security policies by monitoring and regulating the data packets that are permitted to enter or exit the network. This means that unauthorized access attempts can be blocked while legitimate communications are allowed, helping to protect sensitive information and improve overall network security.

While other options mention various benefits, they do not accurately represent the core function of a firewall. For instance, a firewall does not inherently enhance internet speed; in fact, its filtering processes could affect speed under certain conditions. Likewise, while a firewall can help defend against malware by blocking certain suspicious traffic, it is not a foolproof method to prevent all types of malware, as malicious software can still enter a system through means that a firewall does not inspect. Furthermore, a firewall cannot replace antivirus software since antivirus programs are designed to detect, quarantine, and remove malware that might have already infiltrated the system, whereas a firewall primarily focuses on regulating traffic. Thus, controlling network traffic is indeed the fundamental role and significant advantage of implementing a firewall in an operating system.