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Federal Internet Law & Policy
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Layered Model of Regulation

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  • Janet Abbate, Inventing the Internet (MIT Press 1999) Recounting how the layered model was adopted for ARPANET
    • P 66: "The initial division between subnet and host layers had simplified the work of the network's designers; now the [Network Control Center] NCC allowed the network's users to ignore much of the operational complexity of the subnet and to view the entire communications layer as a black box operated by Bolt, Beranek and Newman [BBN]. The NCC had become a managerial reinforcement of ARPA's layering scheme."
    • P 67: "Roberts suggested separating the host functions into two layers. The first, called the "host layer," would feature a general-purpose protocol to set up communications between a pair of hosts; the second, called the "application layer," would specify protocols for network applications such as remote login or file transfer. Having spearate host and application layers would simply the host protocol and lessen the burden on the host system's programmers. Also, eliminating the need for each application to duplicate the work of setting up a host-to-host connection would make it easier to create applications programs, thereby encouraging people to add to the pool of network resources. The ARPANet model now had three layers...." This model would be reflected in the Network Control Protocol (NCP)
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