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Chap1.
• Internet communication must continue despite loss of networks or gateways.
• The Internet must support multiple types of communication services.
• The Internet architecture must accommodate a variety of networks.
• The Internet architecture must permit distributed management of its resources.
• The Internet architecture must be cost-effective.
• The Internet architecture must permit host attachment with a low level of effort.
• The resources used in the Internet architecture must be accountable.