server/client structure, the client can search commodities prices.

读者需要首先启动聊天服务器程序后方可利用客户端来登录聊天-Readers need to first start the chat server program before it can use the client to log in to chat

asp课件及源代码这个课件及试题都不错,我是非常喜欢他的-asp electric materials is very good I is very like

计算校验和 校验和算法描述：为保证网络上传输的数据的可靠性，在许多协议中都设置了校验和项，例如：IPv4、ICMPv4、IGMPV4、ICMPv6、UDP和TCP 等等。计算这些校验和的算法称为网际校验和算法，简单来说就是：把被校验的数据１６位进行累加，然后取反码，若数据字节长度为奇数，则数据尾部补一个字节的０以凑成偶数。 由于从输入文件读入的数据不能直接满足计算校验和的条件，所以首先对从文件读入缓冲区的数据进行预处理，即读入缓冲区时忽略空格。由于累加是按16位进行的，所以每次从缓冲区中读出4个字符，并将字符转换成对应的16进制数字，如此依次累加，直至数据全部读完。 还有一种情况，即如果数据长度为奇数个字节，则需要判断，并补0累加。程序中利用的是缓冲区长度计数器i和当前读取到计数器j判断数据长度是否为奇数。即如果数据长度为偶数，则读完数据时当前读取到计数器j的值应与缓冲区长度i相等，而如果数据长度为奇数，则读完数据时，当前读取到计数器j>缓冲区长度i，此时需将缓冲区中剩余的两个字符读出，并补0，转换成相应16进制数以后参与累加。 当累加结束后，将累加和的16位以上数据位移下再进行一次累加，并对最后累加和取反即得所求校验和。 -calculated checksum checksum algorithm Description : To ensure the network transmission of data reliability, in many of the agreements are set up and calibration, for example : IPv4, ICMPv4, IGMPV4, ICMPv6. UDP and TCP so on. Calculating checksum algorithm called the Internet checksum algorithm, the simple answer is : as has been the calibration data for 16 cumulative, and then take the anti-code, if the data byte length of the odd, data will make up the tai

端口扫描(含源代码)-port scanning (including source code)

2000下调试 成功-2000 under the successful commissioning

这是一个简单的小程序！可以实现用http协议将Web上的文件下载到本机的Windows文件夹！-This is a simple little procedure! Http can be used to achieve agreement on the Web to download the document for the Windows folder!

网络高性能服务器编写时采用的完成例程模型的讲解代码-High-performance network servers used in the preparation of the completion of routine model to explain the code

一个网络多播的源代码- A network broadcasts much source code

采用了DOM实现了客户端和服务器端的通讯.-used to achieve the client and server communications.

一个很好的聊天工具，你可以从中学到很多东西，通过这个软件的学习，你一定会提高不少-a good chat tools, you will be able to learn a lot of things, the software through the study, You would certainly raise a lot of