CompTIA Network+ (N10-007) — Question 177

A single PRI can deliver multiple voice calls simultaneously using which of the following Layer 1 technologies?

Answer options

• A. Time division multiplexing
• B. Analog circuit switching
• C. CSMA/CD
• D. Time division spread spectrum

Correct answer: A

Explanation

The correct answer is A, Time division multiplexing, as it efficiently allocates time slots for multiple calls over a single PRI line. The other options, such as B (Analog circuit switching) and C (CSMA/CD), do not provide the same level of efficiency for managing multiple voice calls, while D (Time division spread spectrum) is not relevant to PRI technology.