An engineer is implementing a network access control solution for a client. The client has separate data and voice VLANs and the deployment is now entering the testing phase. Which configuration…

The correct answer is B. Add TACACS+ as a failover backup solution. When implementing network access control solutions, such as 802.1X, for environments with separate data and voice VLANs, it is critical to ensure that the voice VLAN ID does not conflict with other configurations or settings that may cause authentication issues. Voice VLANs are…

Submitted by khalil_dz· Mar 30, 2026Secure Network Access, Visibility and Enforcement

Question

An engineer is implementing a network access control solution for a client. The client has separate data and voice VLANs and the deployment is now entering the testing phase. Which configuration must be made next to ensure there are no user authentication issues?

Options

AChange the ID of the voice VLAN
BAdd TACACS+ as a failover backup solution.
CRemove VRF settings from the client ports on the switch
DDelete the downloadable MAC access control lists

How the community answered

(33 responses)

A
12% (4)
B
79% (26)
C
6% (2)
D
3% (1)

Explanation

When implementing network access control solutions, such as 802.1X, for environments with separate data and voice VLANs, it is critical to ensure that the voice VLAN ID does not conflict with other configurations or settings that may cause authentication issues. Voice VLANs are often used for devices like IP phones that bypass certain user authentication steps to ensure uninterrupted service. A misconfigured or conflicting voice VLAN ID can lead to network disruptions or unexpected behavior during testing.

Topics

#NAC#User Authentication#TACACS+#Authentication Failover

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