What are three techniques for mitigating VLAN hopping attacks? (Choose three.)

What are three techniques for mitigating VLAN hopping attacks? (Choose three.)

• Disable DTP.
• Enable trunking manually.
• Set the native VLAN to an unused VLAN.
• Enable BPDU guard.
• Enable Source Guard.
• Use private VLANs.
  

  Answers Explanation & Hints: Mitigating a VLAN hopping attack can be done by disabling Dynamic Trunking Protocol (DTP), manually setting ports to trunking mode, and by setting the native VLAN of trunk links to VLANs not in use.