Which of the following is a common duty of a security guard?

Monitoring surveillance equipment is indeed a common duty of a security guard. This task is essential for ensuring the safety and security of the environment they are assigned to protect. By observing real-time footage from cameras, security guards can detect any suspicious activities, respond promptly to incidents, and provide crucial evidence if necessary. Their vigilance through surveillance plays a key role in deterring crime and maintaining order.

The other options listed encompass responsibilities that typically fall outside the standard duties of a security guard. For instance, verifying employee schedules is usually a human resources function, participating in corporate meetings involves strategic planning and business discussions, and providing legal counsel requires specific legal expertise that security guards do not possess. Therefore, monitoring surveillance equipment stands out as a primary responsibility inherent to the security profession.