Information Technology Specialist (ITS) Cybersecurity Practice Exam

Why is it important to block certain IP addresses from entering your network?

1. They are used for legitimate data transfer.

2. These addresses are easier to use for IP spoofing attacks.

3. They enhance network speed.

4. They prevent unauthorized physical access.

The correct answer is: These addresses are easier to use for IP spoofing attacks.

Blocking certain IP addresses from entering your network is critical primarily due to the potential for those addresses to be involved in malicious activities, such as IP spoofing attacks. IP spoofing occurs when an attacker sends messages to a computer with an IP address that indicates the message is coming from a trusted source. By preventing access from known problematic IP addresses, you can significantly reduce the risk of unauthorized access and data breaches. Knowing the reputation of an IP address is essential in cybersecurity. Some IPs are well-documented as being associated with malicious actors, whether through past attacks or participation in botnets. By implementing rules to block these addresses, organizations can fortify their defenses, protect sensitive information, and uphold the integrity of their network systems. The other options are less relevant to the necessity of blocking IP addresses. For instance, blocking addresses used for legitimate data transfer would counterproductively hinder network operations. Enhanced network speed is not directly related to blocking specific IPs, as unoptimized configurations and bandwidth limitations are typically to blame for performance issues. Lastly, preventing unauthorized physical access pertains more to physical security measures rather than network-level security adjustments involving IP address blocking.