A security tool is a software or hardware solution designed to protect computer systems, networks, and data from unauthorized access, attacks, or damage. These tools can include antivirus programs, firewalls, and intrusion detection systems, which help identify and mitigate potential threats. Organizations use security tools to ensure the confidentiality, integrity, and availability of their information. By implementing these tools, businesses can safeguard sensitive data, comply with regulations, and maintain trust with customers. Examples of popular security tools include Norton Antivirus, McAfee, and Cisco Firewalls.