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Difficulty: MediumMobile Device Ports and Accessories

A mobile field technician is setting up a high-performance tablet for an engineer. The tablet must connect to a multi-port docking station using its single physical USB Type-C port to drive an external 4K monitor while simultaneously transferring large raw data files to an external PCIe NVMe storage drive at high speed. Which TWO of the following port features or protocol standards must the tablet's USB Type-C port support to fulfill these hardware requirements?

  1. DisplayPort Alternate Mode (DP Alt Mode) for video signal transmissionAnswer
  2. Thunderbolt 3 or Thunderbolt 4 protocol support for high-throughput PCIe tunnelingAnswer
  3. C
    Legacy USB 2.0 On-The-Go (OTG) host mode to multiplex video and PCIe signals across physical data pins
  4. D
    Exchange ActiveSync (EAS) hardware pass-through for display and peripheral bus mapping

Answer

The tablet's physical USB Type-C port must support DisplayPort Alternate Mode (DP Alt Mode) for external 4K video output and Thunderbolt 3 or Thunderbolt 4 protocol support for high-bandwidth PCIe NVMe storage access.
To drive an external 4K display and maintain high-speed external NVMe file transfers simultaneously over a single USB Type-C cable, the mobile device host port must support DisplayPort Alternate Mode (to transmit native video signals across dedicated physical lanes) and Thunderbolt 3 or Thunderbolt 4 (to tunnel PCIe data at up to 40 Gbps).

Step-by-Step Solution

1
Identify the video output requirement for the mobile tablet.
The tablet needs to transmit native video to an external 4K monitor via USB-C.
DisplayPort Alternate Mode allows non-USB protocols (like DisplayPort) to use the physical USB-C pins.
2
Identify the data bandwidth and storage interface requirement.
High-speed PCIe NVMe transfers require dedicated PCIe protocol tunneling and high throughput.
Thunderbolt 3/4 standards encapsulate PCIe data over the USB-C connector at up to 40 Gbps, enabling full NVMe speeds.
3
Evaluate and eliminate distractors based on protocol capabilities.
USB 2.0 OTG lacks bandwidth and video Alt Mode capabilities, while Exchange ActiveSync is a software email sync protocol.
Physical connector shape (USB-C) does not guarantee protocol capabilities unless specifically supported by host controllers.

Key Concept

Mobile Device Port Standards and Protocol Capabilities
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Topics

Mobile Device Ports and Accessories

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