Which technology has replaced the conventional PSTN in many corporate and home environments?

Which technology has replaced the conventional PSTN in many corporate and home environments?

• A. DNSSEC Zone Walking
• B. VoIP
• C. LDNS
• D. IKE-scan

Answer: (B)

VoIP replaces the conventional PSTN by delivering voice over IP networks instead of through traditional circuit-switched telephone lines. This shifts voice communication from dedicated copper circuits to packets traveling over data networks, which enables significant cost savings, easier scalability, and better integration with other digital services. In the PSTN, calls occupy a fixed circuit for duration of the conversation, which can be costly and less flexible, especially for long-distance or international use. VoIP, on the other hand, converts voice into data packets, routes them over local networks or the internet, and uses standard signaling protocols to establish and manage calls. This makes it cheaper, easier to scale, and more adaptable for features like remote work, integrated messaging, video, voicemail-to-email, and presence. The other options refer to DNS-related topics or VPN scanning tools, which are not about voice communication technology. They don’t explain why voice services have moved away from the traditional PSTN in many environments.

VoIP replaces the conventional PSTN by delivering voice over IP networks instead of through traditional circuit-switched telephone lines. This shifts voice communication from dedicated copper circuits to packets traveling over data networks, which enables significant cost savings, easier scalability, and better integration with other digital services.

In the PSTN, calls occupy a fixed circuit for duration of the conversation, which can be costly and less flexible, especially for long-distance or international use. VoIP, on the other hand, converts voice into data packets, routes them over local networks or the internet, and uses standard signaling protocols to establish and manage calls. This makes it cheaper, easier to scale, and more adaptable for features like remote work, integrated messaging, video, voicemail-to-email, and presence.

The other options refer to DNS-related topics or VPN scanning tools, which are not about voice communication technology. They don’t explain why voice services have moved away from the traditional PSTN in many environments.