In data center security, which statement best describes the role of perimeter defense mechanisms such as firewalls and IPS?

• A. They provide perimeter security to block unauthorized access to network elements
• B. They primarily manage user accounts
• C. They store backups
• D. They monitor internal performance

Answer: (A)

At the boundary of a network, perimeter defense mechanisms act as the first line of defense. Firewalls enforce access control rules to allow or block traffic entering or leaving the data center, while intrusion prevention systems inspect traffic for malicious activity and can drop or block threatening connections. Together, they provide perimeter security to prevent unauthorized access to network elements and services at the network edge. They aren’t meant for managing user accounts, storing backups, or monitoring internal performance, which fall into identity management, data protection/disaster recovery, and network performance monitoring, respectively.