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### Instruction:
How have network applications and traffic evolved since the early days of data networking?
### Response:
Since the 1980s, network applications have expanded dramatically to include video conferencing, instant messaging, IPTV, telepresence, telemedicine, peer-to-peer sharing, video surveillance, online banking, online shopping and countless others. Internet users have grown from 16 million in 1995 to 1.46 billion in 2008, with a corresponding increase in per-user bandwidth consumption.
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