Comprehensive and Detailed Explanation From Exact Extract (Aligned With CompTIA A+ 220-1201 Study Guide)
CompTIA networking fundamentals describe VLANs (Virtual Local Area Networks) as a method to segment network traffic logically, even while using the same physical switch hardware.
A VLAN allows a company to:
Separate traffic by department
Improve security
Reduce broadcast domains
Control inter-department access
To separate accounting and customer service networks, VLANs are the industry-standard and the CompTIA-approved method.
Why the other options are incorrect
A. VPN – Used for secure remote connections, not internal LAN segmentation.
B. DNS – Resolves hostnames to IPs, not used for network separation.
D. DHCP – Assigns IP addresses; does not isolate network groups.
Final Answer: C
