Voice over Internet Protocol

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/voice-over-internet-protocol

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. Who invented Voice over Internet Protocol?Conceptualized in the 1970s, commercialized in the mid-1990s
2. What is the technology category?Packet-switched real-time communication
3. What is the key protocols?SIP (Session Initiation Protocol), RTP (Real-time Transport Protocol), H.323
4. What is Voice over Internet Protocol (VoIP)?VoIP lets you talk to people using the internet instead of old telephone lines. It turns your voice into digital data, sends it in small packets, and reassembles it at the other end so you can hear each other.
5. How does VoIP send my voice over the internet?Your voice is first captured by a microphone, turned into digital bits, compressed by a codec, put into RTP packets, and sent over the internet. The packets travel separately and are put back together on the other side, then turned back into sound.

Circuit Switching: A method where a dedicated physical connection is established for the duration of a call.
Packet Switching: Data is broken into packets, routed independently, and reassembled at the destination.
Codec (Coder-Decoder): Software or hardware that compresses and decompresses digital audio data.
Jitter Buffer: A buffer that stores incoming data packets to smooth out variations in arrival times.