Fa0/2 is a trunk link to another switch. All other ports are unused. Which security best practice did the administrator forget to configure?

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dynamic-routing

#1

Refer to the exhibit. Interface Fa0/1 is connected to a PC. Fa0/2 is a trunk link to another switch. All other ports are unused. Which security best practice did the administrator forget to configure?

  1. Configure all unused ports to a ‘black-hole’ VLAN that is not used for anything on the network.
  2. Disable autonegotiation and set ports to either static access or static trunk.
  3. Change the native VLAN to a fixed VLAN that is distinct from all user VLANs and to a VLAN number that is not VLAN 1.
  4. All user ports are associated with VLANs distinct from VLAN 1 and distinct from the ‘black-hole’ VLAN.