This paper is an overview of policy concerns for data networks and a discussion of the security issues that underlie them. It defines certain relevant terms, then establishes a partial taxonomy of data networks, characterizes them by various attributes, reviews security as a federal policy and standards issue, and finally suggests various policies that will be desirable, if not essential, to protect the networks that the United States will create as it moves into the age of a National Information Infrastructure (NII). The paper does not recommend specific policy positions or offer draft policy statements.
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