A VLAN (Virtual Local Area Network) is a network technology used to logically segment a physical network into multiple distinct broadcast domains, even if they share the same hardware.
From the CompTIA A+ 220-1101 Official Study Guide, Objective 2.2 – Compare and contrast common networking hardware:
“VLANs allow network administrators to segment a network logically, isolating broadcast traffic and improving security and management, regardless of the physical network layout.”
Other options explained:
MAC (Media Access Control) is a hardware address, not a segmentation method.
NIC (Network Interface Card) is network hardware, not for logical segmentation.
DSL (Digital Subscriber Line) is an internet connection type.
Verified Source:
CompTIA A+ Core 1 (220-1101) Official Study Guide, Chapter 2: Networking Concepts
CompTIA Exam Objectives 220-1101, Domain 2.2
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