To prevent unauthorized access, businesses must implement a layered security approach. This includes surveillance systems, access control badges, visitor logs, and trained security personnel. Cybersecurity measures, such as strong passwords and two-factor authentication, are also vital. Physical barriers such as gates or secure entry points further enhance protection. Regular audits and employee awareness programs help identify security gaps. Utilizing technology in conjunction with human vigilance is crucial for maintaining control and preventing potential breaches. Every organization should assess its risk level and adopt preventive strategies accordingly to prevent unauthorized access before incidents occur.