A Measurement Study of Changes in Service-Level Reachability in the Global TCP/IP Internet

科罗拉多的网络资源发现项目 调查了一些与允许用户使用 互联网发现感兴趣的资源， 行政权力下放的环境，包括资源 例如文档、网络服务和人员。 隐含在这些 项目是假设互联网将继续增长 并发展为支持广域分布式的媒介 应用. 针对一些广为人知的问题， 许多网站都安装了机制，以限制他们的接触， 安全入侵。 虽然这些措施比 安全违规行为可能造成的损害， 他们可能会限制互联网的能力。 了解 这种情况的演变，研究人员建议进行 服务水平变化的纵向测量研究 在全球TCP/IP互联网的可达性。 他们收集的数据 将揭示网站如何解决支持问题的变化， 开放网络使用，同时确保合理的安全性。

The Networked Resource Discovery Project of Colorado has investigated a number of issues concerned with allowing users of the Internet to discover resources of interest in large administratively decentralized environments, including resources such as documents, network services, and people. Implicit in these projects is the assumption that the Internet will continue to grow and evolve as a medium for supporting wide area distributed applications. In response to a number of well publicized problems many sites have installed mechanisms to limit their exposure to security intrusions. While these measures are preferable to the damage that could occur from security violations, taken to extremes they could limit the capability of the Internet. To understand the evolution of this situation, the researchers propose to carry out a longitudinal measurement study of changes in service-level reachability in the global TCP/IP Internet. The data they gather will uncover changes in how sites resolve the problem of supporting open network usage while ensuring reasonable security.