What is the primary function of a bollard in security implementations?

The primary function of a bollard in security implementations is to stop vehicles from entering a restricted area. Bollards are physical barriers typically made of sturdy materials designed to deter unauthorized vehicle access while still allowing pedestrian movement. They are strategically placed to protect critical infrastructure, ensure the safety of individuals in a specific vicinity, and prevent vehicular attacks, especially in locations where security is of utmost importance, such as government buildings, airports, and event venues.

Bollards effectively control traffic without obstructing the view or accessibility for pedestrians. Their design can range from removable to fixed, and they can be designed to withstand various impact forces, enhancing their effectiveness as a security measure. In contrast, the other options relate to different security concepts, such as data encryption or network monitoring, which do not pertain to the physical barrier purpose of bollards.