Final answer:
The Secure Area at an airport is the space where screened passengers wait after going through security checkpoints. This area is separated from non-passengers and includes access to gates, shops, and lounges.
Step-by-step explanation:
The area that segregates screened passengers from other persons at an airport is known as the Secure Area. This is the space beyond the security checkpoint where passengers have completed the screening process. These secure areas are typically where travelers find shops, restaurants, departure gates, and lounge areas, and they are only accessible to passengers who have a boarding pass and have been screened. The process of security screening, which usually involves standing in line for the body scanners, is vital to the safety of air travel, just as ticketing and boarding are essential steps in the travel process. All of these steps are considered rate-determining steps in the context of airport operations because they are necessary and can slow down the entire process of getting passengers on their plane due to their sequential and limited-service capacity.