CompTIA N10-009 Physical Security Controls Guide

Physical-security questions are still network-security questions. CompTIA uses them to check whether you can see that closets, racks, branch offices, badge readers, cameras, and visitor controls all protect the devices and links that logical controls depend on. If someone can walk up to the hardware, your perfect ACL may not matter much.

Mantrap: A controlled entry space that restricts tailgating and enforces identity checks at physical boundaries.

Tailgating: An unauthorized person following an authorized person through a controlled entry point.

CCTV: Closed-circuit television, camera coverage used for monitoring and evidence collection in defined spaces.

What CompTIA is really testing

The strongest answers usually depend on whether you can separate:

• access deterrence from access detection
• facility controls from logical network controls
• evidence collection from actual prevention
• public office space from restricted infrastructure space

Match the control to the exposure

Physical security supports network security

    flowchart LR
	  A["Facility entry"] --> B["Room or closet boundary"]
	  B --> C["Rack or cabinet protection"]
	  C --> D["Device and cable integrity"]
	  D --> E["Logical controls can still be trusted"]

What to notice:

• physical access sits underneath the logical security stack
• the closer an attacker gets to the hardware, the more other controls can be bypassed
• branch closets and remote cabinets matter just as much as core data-center rooms

Small scenario example

1Branch office network closet:
2- unlocked utility room
3- patch panel exposed
4- firewall and switch on open shelf
5- no camera or access logging

What to notice:

• this is a real security weakness even if the firewall rules are strong
• physical exposure can lead to cable swaps, console access, theft, or simple disruption
• the fix is not only “add another ACL”

Common traps

• answering a physical-exposure question with a logical control only
• assuming cameras prevent attacks by themselves
• forgetting that branch offices, wiring closets, and patch panels are real attack surfaces
• focusing on doors but ignoring racks, consoles, and removable media or cables

What strong answers usually do

• identify when the problem is physical access rather than logical policy
• choose the control that directly limits or records access to the exposed asset
• remember that evidence controls and prevention controls are not the same
• treat network infrastructure spaces as security boundaries, not just facilities space

Decision order that usually wins

Treat physical-security questions as path-control questions. First, ask whether the scenario is about preventing entry, deterring tampering, or collecting evidence after the fact. Second, match the control to that goal: locks and badge access for prevention, barriers and mantraps for controlled entry, cameras for monitoring and evidence. The weak answer is usually a surveillance-only control when the main problem is that someone can still reach the hardware.

Quiz

Continue with 4.3 Deception Tech to keep the domain flow intact.