Which benefit of digital transmission relates to carrying voice, video, and data on the same circuit?

• A. Integrating voice, video, and data on the same circuit is far simpler
• B. It limits the types of traffic
• C. It requires separate circuits for each service
• D. It increases latency dramatically

Answer: (A)

Digital transmission enables convergence, meaning voice, video, and data can be carried over one circuit by using multiplexing and common digital paths. By converting all types of traffic into a digital form and sharing bandwidth through techniques like time-division multiplexing, packet switching, or other multiplexing methods, a single physical link can support many streams simultaneously. This reduces the need to lay and manage separate circuits for each service, making the network simpler to provision, maintain, and scale as demand grows.

In practice, this convergence is what lets a phone call, a video conference, and a data transfer share the same backbone without needing distinct dedicated lines. It also allows bandwidth to be allocated where needed and supports quality-of-service mechanisms to keep voice and video performance acceptable. The other statements don’t fit because digital transmission actually enables more types of traffic to share a circuit, not fewer, and it is designed to reduce, not inherently increase, latency, rather than requiring separate circuits for each service.