How many keypads are generally required for a residential intrusion detection system?

In a residential intrusion detection system, the standard practice is to have a minimum of one keypad. This keypad serves as the primary user interface for arming and disarming the system, as well as for accessing its various functions. Having at least one keypad ensures that residents can easily manage their security settings.

In smaller homes or apartments, one keypad is usually sufficient to provide full control over the security system. In larger homes, additional keypads might be desirable for convenience, allowing residents to access the system from different locations. However, the fundamental requirement is satisfied with just one keypad.

Options that suggest more keypads or reliance solely on mobile applications may not cater to every user preference or ease of access, especially in scenarios where mobile connectivity might be unreliable. Therefore, the correct answer reflects the essential requirement for effective system management in a residential setting.