An administrator issues the show vlan brief command on a Cisco switch and the output shows that all ports are currently assigned to the default VLAN. What conclusion can be drawn?
- Layer 2 control traffic is not associated with any VLAN.
- The switch cannot be remotely managed using Telnet or SSH until a management VLAN has been created.
- All user data traffic will be separated and secured from other users.
- There is a security risk because the management VLAN and the native VLAN are the same.
Explanation: In the show vlan brief output, if all ports are currently assigned to the default VLAN 1, then no native VLAN is explicitly assigned and no other VLANs are active. Therefore, the network is designed with the native VLAN the same as the management VLAN. This is considered a security risk. By default, all Layer 2 control traffic is associated with VLAN 1.
Related exam: CCNA (200-301) Certification Practice Exam (ENSA v7.0)
