CompTIA Updated N10-009 Exam Questions and Answers by harun

VLANs (Virtual Local Area Networks) segment network traffic by department, allowing ACLs (Access Control Lists) to be applied based on VLAN membership, improving security and resource isolation.

Breakdown of Options:

A. VLAN – Correct answer. VLANs enable logical network segmentation, allowing ACLs per department.

B. DHCP – Assigns IP addresses but does not control access.

C. VPN – Provides remote access, not segmentation within a network.

D. STP – Prevents switching loops, not related to ACL implementation.

In a data center that uses hot aisle/cold aisle ventilation, equipment is typically installed so that cool air enters from the cold aisle (front) and hot air is exhausted to the hot aisle (rear). This configuration maximizes cooling efficiency.

The netstat output shows that multiple ports are open, including Telnet (23), FTP (20), and TFTP (69), which are potential security risks. Disabling unused ports minimizes the attack surface, reducing security vulnerabilities.

Breakdown of Options:

A. Disable the unused ports – Correct answer. Unused ports should be closed to prevent unauthorized access.

B. Enforce access control lists – ACLs help control access but do not disable unnecessary services.

C. Perform content filtering – Content filtering controls web traffic, not port security.

D. Set up a screened subnet – A DMZ (screened subnet) improves security but does not address open ports.