75. A VoIP phone is plugged into a port but cannot receive calls. Which of the following needs to be done on the port to address the issue?
Answer: C
Tag the traffic to the voice VLAN.
For a VoIP phone to function properly and receive calls, it is essential to tag the traffic to the voice VLAN. This ensures that the phone is recognized on the correct network segment designated for voice communication, allowing it to receive incoming calls.
A) Trunk all VLANs on the port.
Trunking all VLANs on the port may not address the issue effectively. While it allows multiple VLANs to be carried over a single link, it does not specifically configure the VoIP traffic to be prioritized or recognized, which is critical for the phone's operation.
B) Configure the native VLAN.
Configuring the native VLAN is not sufficient to resolve the problem. The native VLAN is primarily used for untagged traffic, which does not apply to VoIP phones that require tagged traffic to identify and segregate voice traffic from other types of data traffic.
C) Tag the traffic to the voice VLAN.
Tagging the traffic to the voice VLAN is crucial as it ensures that the VoIP phone is placed in the correct VLAN for voice services. This allows the phone to communicate effectively with other devices on the voice network, enabling it to receive calls.
D) Disable the VLANs.
Disabling the VLANs would prevent any communication, including voice traffic, from reaching the VoIP phone. This would exacerbate the problem rather than resolve it, making it an ineffective solution.
Conclusion
Tagging the traffic to the voice VLAN is essential for the VoIP phone's functionality, facilitating its ability to receive calls. The other options either fail to address the specific requirements for VoIP traffic or would hinder communication altogether, making them unsuitable solutions. Therefore, option C is the definitive answer to the issue presented.