文件名称:
ASN.1 Communication between Heterogeneous Systems
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文件大小: 6mb
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上传时间: 2013-01-12
详细说明： Abstract Syntax Notation One (ASN.1) is a notation that is used in describing messages to be exchanged between communicating application programs. It provides a high level description of messages that frees protocol designers from having to focus on the bits and bytes layout of messages. Initially used to describe email messages within the Open Systems Interconnection protocols, ASN.1 has since been adopted for use by a wide range of other applications, such as in network management, secure email, cellular telephony, air tra±c c ontrol, and voice and video over the Internet. Closely associated with ASN.1 are sets of standardized encoding rules that describe the bits and bytes layout of messages as they are in transit between communicating application programs. Neither ASN.1 nor its encoding rules are tied to any particular computer architecture, operating system, language or application program structure, and are used in a range of programming languages, including Java, C++, C or COBOL. The formal standards documents on ASN.1 and its encoding rules are published by the International Telecommunications Union-Telecommunications Sector (ITU-T), by the International Organization for Standardization (ISO) and by the International Electrotechnical Commission (IEC). Though the standards are very thorough and precise in their definitions, they are not easy to read. The purpose of this book is to explain ASN.1 and its encoding rules in easy to understand terms. It addresses the subject at both an introductory level that is suitable for beginners, and at a more detailed level that is meant for those who seek a deeper understanding of ASN.1 and the encoding rules. Application protocol designers who need a solid understanding of ASN.1, and computer programmers who desire a clear and full understanding of the standardized encoding rules of ASN.1, will bene¯t from reading this book. ...展开收缩
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