A Cisco IP phone receive untagged data traffic from an attached PC. Which action is taken by the phone?

The correct answer is A. It allows the traffic to pass through unchanged. Untagged traffic from the device attached to the Cisco IP Phone passes through the phone unchanged, regardless of the trust state of the access port on the phone. 2_40_se/ configuration/guide/scg/swvoip.pdf

Submitted by brentm· Mar 5, 2026Network Access

Question

A Cisco IP phone receive untagged data traffic from an attached PC. Which action is taken by the phone?

Options

AIt allows the traffic to pass through unchanged
BIt drops the traffic
CIt tags the traffic with the default VLAN
DIt tags the traffic with the native VLAN

How the community answered

(30 responses)

A
93% (28)
B
3% (1)
D
3% (1)

Explanation

Untagged traffic from the device attached to the Cisco IP Phone passes through the phone unchanged, regardless of the trust state of the access port on the phone. 2_40_se/ configuration/guide/scg/swvoip.pdf

Topics

#IP phone#voice VLAN#untagged traffic#access port

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