Question

Which of the following is the main task in Network Security?

• A. It contains new software that helps keep your computer current.
• B. It provides information on whether a device's ports are open, closed or filtered.
• C. It involves access control, activating antivirus software, application security, etc.
• D. It automatically updates the operating system.

Hint:

Network Security is a multi-layered discipline. It requires a combination of physical controls (lockable server racks), technical controls (firewalls, encryption, antivirus), and administrative controls (security policies and employee training).

Answer 1

The Correct Option is C

Step 1: Defining Network Security:
Network security consists of the policies, processes, and practices implemented to prevent, detect, and monitor unauthorized access, misuse, modification, or denial of a computer network and its accessible resources.

Step 2: Evaluating the Scope of Network Security:
Let's evaluate the given options:

• Option A and D: These represent system maintenance and operating system patch management, which are general IT operations rather than core network security practices.
• Option B: This is the specific function of a port scanner tool (like Nmap), which is a diagnostic utility used for network reconnaissance.
• Option C: This represents the comprehensive, multi-layered security approach of Network Security. It includes establishing Access Control (defining user permissions), deploying firewalls, activating antivirus software, enforcing application security, and deploying intrusion prevention systems (IPS) to secure the entire network perimeter.

Step 3: Conclusion:
Therefore, the statement that accurately describes the main task and scope of network security is option (C).