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IPv4 Address Shortage
Many ISPs are giving private addresses (192.168.x.x, 10.x.x.x) to their clients
- These clients can communicate with the Internet via Network Address Translation (NAT)
- Difficult to reach these computers directly
Communication technologies need permanent connection to the Internet
- Cellulars (UMTS will not work with IPv4)
- VoIP, Videoconferencing, Radio/TV
- Games, ...