220-1201 Practice Question: A small office has a multifunction device that…

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✗

  The fax line is plugged into the wrong port on the MFP.

  Why it's wrong here

  If the fax line were plugged into the wrong port on the Multifunction Printer (MFP), neither incoming nor outgoing faxes would typically function. The physical connection is fundamental for any fax communication. Since outgoing faxes are working, it indicates the physical line connection to the appropriate fax port on the MFP is correctly established, making this an unlikely cause for only incoming fax failures.

• ✗

  The MFP's fax memory is full.

  Why it's wrong here

  A full fax memory on the MFP would prevent the device from storing any new fax data, regardless of direction. This would manifest as failures for both incoming faxes, as there's no space to buffer them, and potentially outgoing faxes if the MFP needs to spool them before transmission. Since only incoming faxes are failing, the MFP's memory capacity is not the root cause.

• ✓

  The VoIP system is not configured for T.38 fax protocol.

  Why this is correct

  The T.38 protocol is specifically designed to transmit fax data reliably over IP networks by converting analog fax tones into digital packets, mitigating the effects of packet loss and latency inherent in VoIP. Without T.38, standard VoIP codecs compress and decompress the analog fax tones, often corrupting the precise timing and frequency required for successful fax reception. While outgoing faxes might occasionally succeed due to the sending MFP's ability to adapt, incoming faxes are far more susceptible to these distortions, leading to consistent failures.

• ✗

  The MFP's firmware is outdated.

  Why it's wrong here

  Outdated firmware on a Multifunction Printer (MFP) can indeed lead to a range of operational problems, including general instability, compatibility issues, or specific feature malfunctions. However, it is less likely to cause a highly specific failure mode where only incoming faxes consistently fail while outgoing faxes work perfectly. Such a precise symptom strongly suggests a protocol-level incompatibility or misconfiguration within the VoIP system rather than a broad firmware defect affecting only one direction of a specific function.

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