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Not all packets are created equal. ATM (Asynchronous Transfer Mode) cells have a fixed 48-byte payload, but IP (Internet Protocol) packets have longer headers a
by nayuki 6y ago
Not all packets are created equal. ATM (Asynchronous Transfer Mode) cells have a fixed 48-byte payload, but IP (Internet Protocol) packets have longer headers and variable-length payloads up to about 1500 bytes. ATM is designed for low latency audio transfer, whereas IP incentivizes using bigger packets to reduce overhead at the expense of more latency.
- comex 6y agoHistorically, sure. But at a realistic modern internet speed of, say, 15 MB/s, 1500 bytes takes 0.1ms to transfer. Even at 1.5 MB/s it takes 1ms. Typical VoIP call latency apparently ranges from 20ms to 200ms, so packet size is not a major contributor.