Which of the following actions best addresses a vulnerability found on a company's web server?

Patching is the most direct and effective action to address a vulnerability. It involves applying updates or fixes released by the software vendor to close security loopholes, thereby eliminating the vulnerability itself. Segmentation isolates the web server from other network segments, which can limit the impact of an exploit but does not remove the vulnerability. Decommissioning removes the server from service, which eliminates the vulnerability but is not a practical solution for an active, necessary web server. Monitoring detects exploitation attempts or unusual activity but does not prevent or fix the underlying vulnerability.