Which of the following is listed as a countermeasure?

Which of the following is listed as a countermeasure?

• A. Conventional firewalls
• B. Physical security cameras
• C. Server racks
• D. Cable management

Answer: (A)

A countermeasure is anything put in place to reduce risk from a threat. In network security, conventional firewalls act as a countermeasure by controlling traffic between networks according to defined rules. They inspect data packets, enforce access policies, and block connections that don’t meet security criteria, helping to stop unauthorized access and support defense-in-depth at the network boundary. The other options relate to physical security or infrastructure (cameras for deterrence/monitoring, server racks for organization and cooling, cable management for neatness and reliability) and do not directly counter cyber threats in the way traffic filtering does. That makes conventional firewalls the listed countermeasure.

A countermeasure is anything put in place to reduce risk from a threat. In network security, conventional firewalls act as a countermeasure by controlling traffic between networks according to defined rules. They inspect data packets, enforce access policies, and block connections that don’t meet security criteria, helping to stop unauthorized access and support defense-in-depth at the network boundary. The other options relate to physical security or infrastructure (cameras for deterrence/monitoring, server racks for organization and cooling, cable management for neatness and reliability) and do not directly counter cyber threats in the way traffic filtering does. That makes conventional firewalls the listed countermeasure.