What is considered a primary tool for access control in secure areas?

Keypad entries serve as a primary tool for access control in secure areas because they require users to enter a code or password to gain entry. This mechanism restricts access to authorized personnel only, ensuring that individuals must possess the correct credentials to enter restricted areas. The use of keypad entries enhances security by providing a clear method for verifying identity before granting access, making it a widely adopted solution in securing sensitive environments.

In contrast, visitor logs, while useful for tracking individuals who visit secure areas, do not inherently prevent unauthorized access; they simply record who has entered after the fact. Open gates signify a lack of access control, allowing anyone to enter without verification. Free access, similarly, indicates no barriers to entry, making secure areas vulnerable to unauthorized personnel. Therefore, keypad entries are vital in maintaining the integrity and security of restricted spaces.