N10-005 · Question #932
The network technician has recently implemented VLANs on the company network. Ever since this implementation, sections within the company can no longer share information. While troubleshooting, the…
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…
Question
The network technician has recently implemented VLANs on the company network. Ever since this implementation, sections within the company can no longer share information. While troubleshooting, the technician realizes they are unable to ping a device from another VLAN. Which of the following needs to be configured to fix this problem?
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
How the community answered
(57 responses)- A7% (4)
- B2% (1)
- C14% (8)
- D77% (44)
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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