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好东西，ipv4协议收发实验说明及代码，是你理想中的实验模板，方便你的生活!-Good things, ipv4 protocol transceiver test instructions and code, is your ideal experimental templates to facilitate your life！

A polyalphabetic cipher is any cipher based on substitution, using multiple substitution alphabets. The Vigenère cipher is probably the best-known example of a polyalphabetic cipher, though it is a simplified special case.Polyalphabetic substitution

进程调度的实现包括进程的生命周期，优先级，id号的自动更改与实现，还有内存分配与进程调度的实现在此-Process scheduling implementation, including the process of life cycle, priority, ID number of automatic changes and implementation, as well as memory allocation and process scheduling in this realiza