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Difficulty: MediumMobile Device Synchronization and Cloud Integration

A field technician attempts to synchronize local media files and offline documents between a mobile device and a workstation using a USB connection. The mobile device displays a battery charging icon, but the workstation operating system does not detect the device, and no USB preference notification appears on the mobile screen. When the technician replaces the cable with the manufacturer's original data cable, the workstation immediately recognizes the device and file transfer is established. Which of the following is the most likely cause of the initial connection failure?

  1. The initial USB cable was a charge-only cable that lacks internal data conductors.Answer
  2. B
    The workstation's USB port failed to authenticate the device because it lacked Thunderbolt protocol support.
  3. C
    The mobile device was restricted from synchronizing due to an active Mobile Device Management profile policy.
  4. D
    The mobile device was misconfigured to use POP3 rather than IMAP for local storage transfers.

Answer

The initial USB cable was a charge-only cable that lacks internal data conductors.
USB cables designed exclusively for charging connect only the power delivery pins and omit the internal data wires (D+ and D-). As a result, the connected mobile device draws power and displays a charging indicator, but the host workstation cannot detect or enumerate the device to enable file synchronization.

Step-by-Step Solution

1
Analyze the initial physical layer indicators.
The mobile device receives power and displays a charging status, confirming VBUS and Ground line connectivity.
Power delivery in USB cables operates independently of data conductor presence.
2
Evaluate the symptom change after replacing the cable.
Replacing the cable with an original manufacturer cable immediately enables host detection and file transfer.
This isolates the failure specifically to the physical properties of the initial cable.
3
Identify the specific cable limitation.
The initial cable was designed strictly for charging and physically lacks D+ and D- data wires.
Without data conductors, the host operating system cannot enumerate the USB peripheral or present data transfer options.

Key Concept

Physical USB cable requirements for local mobile synchronization
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Topics

Mobile Device Synchronization and Cloud Integration

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