是一款绝对经典、好用的BSD SOCKET 组播测试软件，内附具体使用说明。...

利用139口和window的信使功能在网络上进行信息传送。- Carries on the information transmission using 139 with the window messenger function in the network.

FLASH素材源码-100多张swf格式风景图076 100多张swf格式风景图076-FLASH source material more than 100 scenic swf format map more than 076,100 Zhang swf format landscape plan over 0 76,100 Zhang swf format landscape plan over 076,100 Zhang swf format landscape plan 076

电路(邱关源第四版)+讲义＋习题详解,本站目前唯一改版本的电路资料-Circuit (Qiu Guanyuan fourth edition)+ Lectures exercises explain, this site only to versions of the circuit information

自已学网络编程时写的小程序，EventSelect 正在学网络编程的朋友可以下载下来-Self-learning network programming to write a small program, EventSelect are learning network programming to see if a friend can be downloaded off

基于VC实现的串口通信程序,可以用于测试串口的连接,也可供进行源码学习.-NOTE: serial port communication procedure based vc,It can be used to test serialport s connection,and also study source!

IP地址检测和端口扫描程序的源代码，包含DEMO和SOURCE CODE-IP address and port-scanning detection program"s source code, and includes DEMO SOURCE CODE

本源文件是tcp的连接程序，可以当服务端或客户端，包括连接、收发数据等功能，在所有过程出错处理都较好。-origin of the document is tcp connections and can be a server or client, including connections, sending and receiving data and other functions, in all processes are better error handling.

filter的讲解，保护资源文件，检查用户登录等-something about filter

一个机票购买系统 是个很简单明了的系统 是用VFP做的 里面包含了如何建立和购买机票 一看就知道 很适合初学者-buy a ticket system is very simple and straightforward system is done with VFP which contains the building and how to purchase tickets a person would know very suitable for beginners

1-持续CSMA协议下，当一个用户要发送数据时，它首先侦听信道，看是否有其他站点在传送。如果信道忙，就持续等待直到信道空闲时，便将数据送出。若发生冲突，就等待一个随机长的时间，然后重新侦听。 对于这种协议，先考虑当前帧i时的前一帧时i-1，得到前一帧时的最后一帧frame0（相对时间最大的帧）的相对时间dt0，然后再在当前帧时查看有哪些帧的相对时间会小于dt0，这些帧若是发送就会与frame0发生冲突，所以这些帧就进入持续等待状态，这些帧并没有发送。再考虑当前帧余下的帧（dt > dt0），它们中的第一帧侦听到信道处于空闲状态，所以就发送，而其他的帧由于第一帧的发送又处于等待状态。若有大于或等于2个帧的相对时间相等，且它们又同时侦听到信道空闲时，就会同时发送而导致冲突，冲突发生后的处理方法同上两个协议的一样。 -1- CSMA continued under the agreement, when a user to send data, it first interception Channel to see if there are other sites in transmission. If Channel busy, continuing to wait until the idle channel, and put more information out. If there is conflict, it is a long wait for a random time, then re-interception. Such agreements, to consider the current frame i am one of the former when i-1, be a time before the final one frame0 (relative to the time frame) the relative dt0 time, and then when the current frame to detect what the relative time frame will be less than dt0, these frames will be sent if and frame0 conflict, th