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N10-009 · Question #463

N10-009 Question #463: Real Exam Question with Answer & Explanation

The correct answer is C: Establish a trunk connection between Switch A and Switch B.. Both PCs reside in VLAN 1, but the only live link between the switches (Gi0/9) is currently in access VLAN 8, so VLAN 1 traffic never crosses. Turning the inter-switch port(s) into a trunk (allowing VLAN 1 across) will carry the users’ VLAN and restore end-to-end connectivity.

Submitted by tyler.j· Mar 6, 2026Network troubleshooting

Question

Computer A cannot reach Computer B in this network: Which of the following will resolve the issue?

Options

  • ASet up link aggregation between Switch A and Switch B on Gi0/9 and Gi0/10.
  • BConfigure spanning tree on Switch A and Switch B.
  • CEstablish a trunk connection between Switch A and Switch B.
  • DPut Computer A and Computer B in the same /24 subnet.

Explanation

Both PCs reside in VLAN 1, but the only live link between the switches (Gi0/9) is currently in access VLAN 8, so VLAN 1 traffic never crosses. Turning the inter-switch port(s) into a trunk (allowing VLAN 1 across) will carry the users’ VLAN and restore end-to-end connectivity.

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