CompTIA Server+ SK0-005 Practice Question

Industry references for critical-facility perimeters call for a minimum fence height of about 8 ft (2.4 m) so that most people cannot easily reach the top. Adding three strands of barbed wire angled 45° outward further discourages climbing while adding only modest cost. Chain-link fabric preserves line-of-sight for guards and cameras and is less expensive than high-end privacy or palisade systems, meeting the "good security at reasonable cost" criterion.

The 6-ft chain-link option is too low and can be scaled quickly. A 12-ft solid vinyl fence is expensive, hinders surveillance, and may violate fire-code sight-line rules. A 4-ft ornamental fence, even with lighting and CCTV, provides little physical barrier because it can be stepped over or vaulted.