CompTIA Network+ (N10-007) — Question 196

A VoIP system will require 23 concurrent voice channels and one signaling channel. Which of the following types of WAN service would provide the BEST connectivity to the PSTN?

Answer options

• A. PRI
• B. BRI
• C. E1/E3
• D. DSL

Correct answer: A

Explanation

The correct answer is A, PRI, as it supports multiple voice channels simultaneously, making it ideal for the requirement of 23 concurrent voice channels. BRI is designed for smaller setups, E1/E3 are more complex and not as commonly used for direct PSTN connectivity in this context, and DSL does not provide the necessary number of voice channels.