Serial vs. parallel data transmission: “In a serial data system, data is transmitted along a group of conductors simultaneously.” Determine whether this statement applies.

Introduction / Context:
Understanding the difference between serial and parallel data transmission is essential for interface design and troubleshooting. Serial interfaces dominate long-distance and high-speed links; parallel interfaces are common on short buses where many conductors are practical.

Given Data / Assumptions:

• Serial transmission sends bits sequentially over one (or a pair of) conductor(s).
• Parallel transmission sends multiple bits at the same time across multiple conductors.
• We assume standard definitions used in communications and computer buses.

Concept / Approach:
The provided statement actually describes parallel transmission, where a “group of conductors” carries multiple bits concurrently. In serial systems, only one bit per symbol interval travels over the link (per lane), even if the physical layer uses a differential pair.

Step-by-Step Solution:

Verification / Alternative check:
Textbook definitions and standards documents consistently define serial as sequential bit transfer over a narrow link and parallel as simultaneous multi-bit transfer over a wide link.

Why Other Options Are Wrong:

• Applies: Inverts the definitions.
• Differential serial links: Still serial; differential signaling uses two conductors for one bit stream.
• Speed- or frame-dependent options: Transmission type is not determined by speed or framing alone.

Common Pitfalls:
Confusing differential pairs (two wires) with parallel multi-bit buses; “two wires” does not mean “parallel words.”

Final Answer:
Does not apply (this describes parallel transmission)