What is the Internet?
The Internet is a global open internetwork based on the afore described Internet architecture
Internet used to be publicly funded for the benefit of research and education
In the old days there was one totally open Internet backbone network that accepted all transit traffic free of charge
Now there are a number of global commercial Internet back-bones operated by large telcos and serving paying customers
Internet still is an open network but routing has become increasingly complex (policy routing etc.)
Types of Internet operators:
- Internet Access Provider (IAP)
- Internet Service Provider (ISP)