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Difficulty: MediumNetwork and Peripheral Cables and Connectors

A technician is attempting to connect an external hard drive enclosure to a workstation using an external SATA (eSATA) interface. The technician tries to use a standard internal SATA data cable for this connection, but notices that the plug will not physically fit into the workstation's eSATA port. Which of the following best explains why the internal SATA cable cannot be inserted into the eSATA port?

  1. Internal SATA connectors use an L-shaped keying mechanism, whereas eSATA connectors feature a straight, flat shape with side insertion grooves to prevent improper cable usage.Answer
  2. B
    Internal SATA cables use a USB Type-C physical pinout structure that requires a active Thunderbolt adapter for external peripheral housing connection.
  3. C
    The eSATA interface uses an 8P8C (RJ45) wiring pattern that is only compatible with twisted-pair network patch cables.
  4. D
    eSATA ports require a DisplayPort Alternate Mode signal path to transmit data over external peripheral cables.

Answer

Internal SATA connectors use an L-shaped keying mechanism, whereas eSATA connectors feature a straight, flat shape with side insertion grooves to prevent improper cable usage.
eSATA connectors were intentionally designed with physical keying differences compared to internal SATA connectors. Internal SATA connectors feature a distinct L-shape key, whereas eSATA connectors have a straight, flat shape with side alignment slots. This physical mismatch prevents internal SATA cables (which lack shielding required for external run limits) from being plugged into external eSATA ports.

Step-by-Step Solution

1
Identify the physical interface types being compared.
The scenario compares an internal SATA cable with an external SATA (eSATA) port.
Understanding physical form factor differences is key to peripheral connector troubleshooting.
2
Analyze the physical keying and design differences between internal SATA and eSATA connectors.
Internal SATA cables feature an L-shaped connector design meant for internal drive bays (up to 1m cable length). eSATA connectors use a straight rectangular design with side notches, additional shielding, and deeper insertion depths designed for external peripherals (up to 2m cable length).
Physical keying prevents users from plugging unshielded internal cables into external ports.

Key Concept

Physical Keying and Connector Characteristics of SATA vs. eSATA Cables
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Topics

Network and Peripheral Cables and Connectors

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