CCNA: Cisco Certified Network Associate — Question 468

Which Layer 2 switch function encapsulates packets for different VLANs so that the packets transverse the same port and maintain traffic separation between the
VLANs?

Answer options

• A. VLAN marking
• B. VLAN numbering
• C. VLAN DSCP
• D. VLAN tagging

Correct answer: D

Explanation

The correct answer is D, VLAN tagging, which is essential for distinguishing packets belonging to different VLANs as they traverse the same network link. Options A, B, and C do not provide the necessary encapsulation to maintain separation between VLAN traffic; thus, they are not suitable for this function.