CCTV and chain link fences provide physical barriers that can discourage criminal activities by restricting access points and allowing business owners to monitor their property. The designs and features of physical barriers, such as the type of fencing material, should be considered when planning security systems to maximize effectiveness. There are four main types of fencing: chain link fencing, ornamental fences, welded wire mesh fabric fencing, and expanded metal fencing, each with different designs, materials, and purposes.