N10-005 · Question #932
N10-005 Question #932: Real Exam Question with Answer & Explanation
The correct answer is D: Configure 802.1q trunks on the switches. 802.1Q is the IEEE standard for VLAN tagging on trunk links. A trunk port carries traffic for multiple VLANs simultaneously by adding a tag to each Ethernet frame identifying its VLAN. Without properly configured 802.1Q trunks between switches (and to the router or Layer 3 switch
Question
Options
- AClear the ARP table
- BAdd host entries on the user's computer
- CConfigure 802.1x trunks on the switches
- DConfigure 802.1q trunks on the switches
Explanation
802.1Q is the IEEE standard for VLAN tagging on trunk links. A trunk port carries traffic for multiple VLANs simultaneously by adding a tag to each Ethernet frame identifying its VLAN. Without properly configured 802.1Q trunks between switches (and to the router or Layer 3 switch handling inter-VLAN routing), VLAN traffic cannot traverse switch-to-switch links, isolating each VLAN. Option C (802.1X) is a port-based Network Access Control standard for authentication - it has nothing to do with VLAN trunking. Clearing the ARP table or adding host entries would not resolve a trunking misconfiguration.
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