Which technique targets network resources on a VLAN to gain access to traffic in other VLANs?

Which technique targets network resources on a VLAN to gain access to traffic in other VLANs?

• A. Switch Spoofing
• B. double tagging
• C. VLAN hopping
• D. Spanning Tree Protocol (STP) attack

Answer: (C)

VLANs separate traffic at the data link layer, so devices in one VLAN shouldn’t see traffic from another. VLAN hopping is the technique attackers use to cross those boundaries and access traffic in other VLANs by abusing how VLAN tags and trunk links are processed on switches. This makes it the best fit for the scenario because it directly describes moving between VLANs to reach resources on a different VLAN. In real networks, methods like double tagging or switch spoofing enable this crossover, while an STP (Spanning Tree Protocol) attack targets the topology itself and doesn’t inherently bypass VLAN isolation to reach other VLANs.

VLANs separate traffic at the data link layer, so devices in one VLAN shouldn’t see traffic from another. VLAN hopping is the technique attackers use to cross those boundaries and access traffic in other VLANs by abusing how VLAN tags and trunk links are processed on switches. This makes it the best fit for the scenario because it directly describes moving between VLANs to reach resources on a different VLAN. In real networks, methods like double tagging or switch spoofing enable this crossover, while an STP (Spanning Tree Protocol) attack targets the topology itself and doesn’t inherently bypass VLAN isolation to reach other VLANs.