Description: 目的：
构造帧对于理解网络协议的概念、协议执行过程，以及网络问题处理的一般方法具有重要的意义。本次练习的目的是通过数据链路层与介质访问控制层的学习，根据数据链路层的基本原理，针对普遍应用的Ethernet帧，通过构造一个具体的帧，引导同学深入理解网络协议的基本概念与网络问题处理的一般方法。
要求：
1、编写程序，根据给出的原始数据，组装一个IEEE802.3格式的帧。题目附带的文件为二进制原始数据(文件名分别为input1和input2)，要求程序为命令行程序，比如可执行文件名为framer.exe，则命令行形式如下：
framer inputfile outputfile
inputfile为原始数据文件，outputfile为输出结果。
操作系统、使用语言和编译环境不限，但在交作业同时要求注明。
2、输出：对应input1和input2的结果分别为output1和output2
3、要有良好的编程规范和注释
4、写文档
-purpose : structural frame for understanding the concept of network protocol, the implementation of an agreement, network issues and the general approach has important significance. The purpose of the exercise through the data link layer and the MAC layer of learning, according to the data link layer to the basic principles against the universal application of the Ethernet frames, by constructing a concrete frame, to guide students in-depth understanding of network protocols and the basic concepts of network issues to deal with the general approach. Requirements : a preparation procedures, given the raw data, assembled an IEEE802.3 frame format. Accompanying documents subject to the original binary data (file name for Input1 and input2) ordering procedures for the command line program, suc Platform: |
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Description: 本书第二部分讲述的是在Wi n 3 2平台上的Wi n s o c k编程。对于众多的基层网络协议，
Wi n s o c k是访问它们的首选接口。而且在每个Wi n 3 2平台上，Wi n s o c k都以不同的形式存在着。
Wi n s o c k是网络编程接口，而不是协议。它从U n i x平台的B e r k e l e y（B S D）套接字方案借鉴了
许多东西，后者能访问多种网络协议。在Wi n 3 2环境中，Wi n s o c k接口最终成为一个真正的
“与协议无关”接口，尤其是在Winsock 2发布之后。-book on the second part of the Wi n 3 2 on the platform's Wi n o c k programming. To many of the grass-roots network protocol, Wi n s o c k is to visit their preferred interface. But in each Wi n 3 2 platform, Wi n o c k's in different forms exist. Wi n s o c k network programming interface, rather than agreement. From U n i x platform B e r k e l e y (S B D) socket program draws many things, The latter would be able to visit a variety of network protocols. In Wi n 3 2 environment, Wi n o c k s interface will eventually become a real "agreement has nothing to do with the" interface, especially in the Winsock 2 was released. Platform: |
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Description: There are two reasons that urged me to create one more string class, in spite of the fact that so many of them already exist. Let s consider the following scenarios:
TCHAR-based application extensively using COM, the functions/interface methods of which are WCHAR-based.
TCHAR-based application working with network protocols, which normally make use of ASCII.
Passing strings across module borders (between an executable and a DLL or between DLLs). In this situation, strings are required to use some global memory allocator (such as GlobalAlloc, CoTaskMemAlloc, or VirtualAlloc).
Necessity to have strings that are compared case-insensitively by default. Sometimes, it is desirable as well to compare case-sensitive strings in a case-insensitive manner and vice versa.
Any combination of the previous scenarios or any situation when different kinds of strings must be used jointly.
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Description: FTP（File Transfer Protocol）即文件传输协议，是一种被广泛应用的网络协议。该协议建立在TCP/IP基础之上，能够保证高可靠性的文件传输。本程序是FTP客户端软件的开发实例。-FTP (File Transfer Protocol) file transfer protocol that is a widely used network protocols. The agreement builds on a TCP/IP based, to ensure high reliability of file transfer. This procedure is FTP client software development examples. Platform: |
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Description: When starting with protocols that work at the upper layers of the network models, each set of data is wrapped inside the next lower layer protocol, similar to wrapping letters inside an envelope. The application creates the data, then the transport layer wraps that data inside its format, then the network layer wraps the data, and finally the link (Ethernet) layer encapsulates the data and transmits it. Each network layer either encapsulates the data stream with additional information, or manages data handling or come part of the connection Platform: |
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Description: 计算校验和
命令行：check_sum infile
其中check_sum是程序名，infile是数据文件名
输出：数据文件的校验和。
目的是通过数据链路层与介质访问控制层的学习，根据数据链路层的基本原理，针对普遍应用的Ethernet帧，通过构造一个具体的帧，深入理解网络协议的基本概念与网络问题处理的一般方法。-calculated checksum command line : check_sum infile which check_sum procedures, and infile data output file name : data files, the checksum. The purpose of the data link layer and the MAC layer of learning, according to the data link layer to the basic principles of universal application against the Ethernet frame, and by constructing a concrete frames, in-depth understanding of network protocols and the basic concepts of network issues to deal with the general approach. Platform: |
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