Which component provides the plug-in interface for different authentication methods in Linux systems?

Which component provides the plug-in interface for different authentication methods in Linux systems?

• A. Pluggable authentication module (PAM)
• B. Pluggable Access Module (PAM)
• C. Privileged Access Management (PAM)
• D. Policy Authentication Module (PAM)

Answer: (A)

Pluggable Authentication Module is a framework that provides the plug-in interface for authentication methods. It lets the system use a variety of authentication mechanisms by loading modular components rather than hard-coding methods into applications. Applications such as login, ssh, or sudo rely on PAM to handle authentication, delegating to a stack of modules that can be added, removed, or reordered through configuration (for example in /etc/pam.d). This design makes it easy to support passwords, biometrics, smart cards, or one-time passwords by simply selecting and sequencing modules, without changing the programs themselves. Other terms mentioned aren’t standard Linux authentication infrastructure, so they don’t describe the plug-in interface that PAM provides.

Pluggable Authentication Module is a framework that provides the plug-in interface for authentication methods. It lets the system use a variety of authentication mechanisms by loading modular components rather than hard-coding methods into applications. Applications such as login, ssh, or sudo rely on PAM to handle authentication, delegating to a stack of modules that can be added, removed, or reordered through configuration (for example in /etc/pam.d). This design makes it easy to support passwords, biometrics, smart cards, or one-time passwords by simply selecting and sequencing modules, without changing the programs themselves. Other terms mentioned aren’t standard Linux authentication infrastructure, so they don’t describe the plug-in interface that PAM provides.