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Mechanisms that enforce bounds on packet lifetimes

机译：强制限制数据包寿命的机制

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摘要

SIGCOMM '83 is the first symposium to be sponsored solely by the ACM Special Interest Group on Data Communication (SIGCOMM). The symposium builds on the momentum of the Computer Network Performance Symposium cosponsored last year with SIGMETRICS and SIGOPS. An annual SIGCOMM symposium is intended to complement SIGCOMM 's quarterly newsletter, the Computer Communication Review, now in its thirteenth year, in serving the almost 5000 members of SIGCOMM. >The tremendous amount of current development activity in computer communications architectures and protocols is reflected in the large number of papers submitted to the symposium. The eleven sessions of refereed papers are complemented by the opening panel and three other panel sessions on the current status of network architectures and protocol implementation experience. It is an international symposium, with about one third of the papers from outside the United States, about the same ratio as with the SIGCOMM membership. >In conjunction with the symposium, two tutorials are being presented, Richard desJardins surveys the international standards for open systems interconnection. David Clark reviews practical considerations of protocol implementation. >The ACM SIGCOMM '83 Symposium provides a forum for the presentation and discussion of state-of-the-art network architectures and protocols for data communications. All aspects of work, both theoretical and practical, pertaining to the entire life cycle of developing protocol systems and networks are of interest to the symposium: theory, systems analysis, architecture, design, implementation, standardization, etc. The symposium is epitomized by the title of the opening panel: Putting Protocols to Work. We are very fortunate to have three experts in the opening panel who will discuss the issues of putting protocols to work in the real world. They are: Vinton Cerf of MCI Communications Corporation, Louis Pouzin of CNET in France, and John Shoch of Xerox Corporation. All of them havehad extensive experience and personal involvement in the design and implementation of operational networks and communication protocols. They will speak from their unique perspectives about the many difficulties that are encountered in deploying real networks and protocols, touching upon not only technical issues but also issues of standardization, user needs in various sectors of the marketplace, etc. >Following the opening panel, the symposium is organized into two tracks of parallel sessions, one primarily on design and implementation issues and the other primarily on verification and performance analysis issues. >On the practical side, the symposium's technical program has placed a strong emphasis on implementation experience. This is the primary concern of panel discussions in Session 3A and Session 4A. Session 6A is devoted to the development and implementation experience of a specific network, the computer science research network project (CSNET) sponsored by the National Science Foundation. Other sessions on practical issues include a panel on the current status of the development of protocol architectures and relevant standardization activities (Session 2A). Internet-working and issues of protocol compatibility are addressed in Session 8A. Session 7A is concerned with issues in the design of network operating systems. Some new ideas on network architectures and algorithms are presented in Session 5A. >On the theoretical side, the sessions may be classified into two categories. The first category includes sessions on analytical models and methods as well as empirical studies to evaluate the performance of new strategies and algorithms for various protocol functions (Session 2B on analysis of network routing, Session 6B on performance studies, Session 713 on local network access protocols, and Session 8B on queueing models of protocols). The second category is concerned with formal models and techniques on the specification and verification of protocol systems. The logical correctness properties of such protocol systems are of interest. This category includes Sessions 3B and 4B on protocol verification methods. Session 5B on specification, testing and performance analysis of protocols is concerned with both the performance and logical behavior of protocols that can be specified using a layered model.
机译：SIGCOMM '83是第一个完全由ACM数据通信特别兴趣小组（SIGCOMM）赞助的研讨会。该研讨会建立在去年与SIGMETRICS和SIGOPS共同发起的计算机网络性能研讨会的势头之上。一年一度的SIGCOMM座谈会旨在补充SIGCOMM的季度通讯《计算机通信评论》（现在已经十三年），为SIGCOMM的近5000名成员提供服务。

当前在计算机领域的大量开发活动通信体系结构和协议反映在提交给研讨会的大量论文中。开幕式小组讨论会补充了十一篇推荐论文，另外三篇小组讨论会涉及网络体系结构的现状和协议实施经验。这是一次国际研讨会，约有三分之一的论文来自美国以外，与SIGCOMM成员的比例大致相同。

与该研讨会一起，正在介绍两个教程，Richard desJardins调查开放系统互连的国际标准。 David Clark回顾了协议实现的实际考虑。

ACM SIGCOMM '83研讨会为介绍和讨论最新的数据通信网络体系结构和协议提供了一个论坛。与开发协议系统和网络的整个生命周期有关的所有工作，无论是理论上的还是实践上的，都是本次研讨会的兴趣所在：理论，系统分析，体系结构，设计，实现，标准化等。开幕面板的标题：使协议生效。我们很幸运在开幕小组中有三位专家，他们将讨论使协议在现实世界中发挥作用的问题。他们是：MCI Communications Corporation的Vinton Cerf，法国CNET的Louis Pouzin和Xerox Corporation的John Shoch。他们都在运营网络和通信协议的设计和实施方面拥有丰富的经验和个人参与。他们将以独特的视角谈论部署实际网络和协议时遇到的许多困难，不仅涉及技术问题，还涉及标准化问题，市场各个部门的用户需求等。

在开幕小组之后，座谈会分为两个平行会议，一个主要涉及设计和实施问题，另一个主要涉及验证和性能分析问题。

在实践方面，该座谈会的技术该计划非常重视实施经验。这是会议3A和会议4A中小组讨论的主要关注点。会议6A专门讨论特定网络的开发和实施经验，这是由美国国家科学基金会赞助的计算机科学研究网络项目（CSNET）。其他有关实际问题的会议包括一个关于协议体系结构和相关标准化活动的当前发展状态的小组会议（会议2A）。会话8A中讨论了Internet工作和协议兼容性问题。会议7A与网络操作系统设计中的问题有关。会议5A中提出了一些有关网络体系结构和算法的新思想。

从理论上讲，这些会议可以分为两类。第一类包括有关分析模型和方法的会议以及评估各种协议功能的新策略和算法性能的实证研究（关于网络路由分析的会议2B，关于性能研究的会议6B，关于本地网络访问协议的会议713） ，以及关于协议排队模型的会议8B）。第二类涉及协议系统规范和验证的形式化模型和技术。这种协议系统的逻辑正确性是令人关注的。此类别包括有关协议验证方法的会议3B和4B。关于协议的规范，测试和性能分析的会议5B与可以使用分层模型指定的协议的性能和逻辑行为有关。

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