Which statement best describes a key benefit of digital transmission over analog?

• A. Produces fewer errors, allows higher speeds, and simplifies integration of voice, video, and data
• B. Produces more errors and lower speeds
• C. Requires more power and is more difficult to encrypt
• D. Is generally more expensive to implement

Answer: (A)

Digital transmission delivers reliable performance by using discrete signals (bits) that can be regenerated, checked for errors, and encoded for high-speed transfer. Because repeaters can restore a clean version of the signal, noise and distortion have less impact, which means far fewer errors. That reliable signaling also enables higher data rates through advanced coding and modulation techniques, making efficient use of available bandwidth. At the same time, digital formats and protocols allow voice, video, and data to be carried together over the same infrastructure with standardized interfaces, easy multiplexing, routing, and quality-of-service management. Encryption is also more straightforward on digital streams, using well-established algorithms. In contrast, the other statements don’t align with how digital transmission handles noise, speed, integration, or cost, so they don’t describe the best overall advantage.