Vint Cerf: A Brief History of Packets

TCP/IP evolved from 20 years' research that sought a way to move from a telephone-style circuit-switched infrastructure to a packet-switched infrastructure. The first Web extra at http://youtu.be/B2-NhlmkDMo is a video interview with Vint Cerf about how TCP/IP evolved from ARPANET, an earlier small-scale research network. The second Web extra at http://youtu.be/awOa4Pk82Kg is an audio recording of Charles Severanceís Computing Conversations column, in which he discusses his interview with Vint Cerf about the history of packets.