Which of the following is a boundary security measure?

• A. Physical or network
• B. Malware and virus protection
• C. Boundary firewall
• D. Patch management

Answer: (C)

Boundary security is about protecting the edge where networks meet. A boundary firewall sits right at that edge and filters traffic between networks, enforcing rules about who can access what. It monitors inbound and outbound connections, blocks potentially harmful or unauthorized activity, and often logs events for monitoring. Because it directly controls traffic crossing the network boundary, it’s the classic example of a boundary security measure.

The other options aren’t boundary controls. A vague phrase like physical or network isn’t a specific protective device. Malware and virus protection targets end-user devices and software, not the network edge. Patch management is about keeping software up to date to reduce vulnerabilities, not about controlling traffic between networks at the boundary.