What type of networks does a VoIP system take advantage of?

What type of networks does a VoIP system take advantage of?

• A. IP networks, such as the Internet and/or Intranets
• B. Cellular networks only
• C. PSTN networks only
• D. Proprietary networks only

Answer: (A)

VoIP delivers voice by sending it as data packets over IP networks. This means the communication rides over the Internet or a private intranet, not the old circuit-switched telephone networks. Signaling and media use standard IP protocols (such as SIP for call setup and RTP for the voice stream), typically over UDP. While VoIP can interconnect with the traditional telephone system via gateways, the actual transport is still IP. It isn’t restricted to cellular or proprietary networks, though those can carry IP traffic if they provide IP connectivity. So the networks VoIP takes advantage of are IP networks like the Internet and intranets.

VoIP delivers voice by sending it as data packets over IP networks. This means the communication rides over the Internet or a private intranet, not the old circuit-switched telephone networks. Signaling and media use standard IP protocols (such as SIP for call setup and RTP for the voice stream), typically over UDP. While VoIP can interconnect with the traditional telephone system via gateways, the actual transport is still IP. It isn’t restricted to cellular or proprietary networks, though those can carry IP traffic if they provide IP connectivity. So the networks VoIP takes advantage of are IP networks like the Internet and intranets.