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Memcached reflection attacks exploit authentication and design flaws in a large number of memcached servers (a distributed caching system) exposed on the Internet, By sending a specific instruction UDP packet that forges the victim's IP address to the default port 11211 of the memcached server's IP address, the attacker causes the memcached server to return data several times larger than the requested packet to the victim's IP address, thus carrying out a reflection attack.Log.info ("% # x= >% s"% (address, (data or ''). Encode ('hex '))Information Theory: I forget which publishing house it was. It is a very thin book and it is very good. There is a good talk about the measurement of information, the understanding of entropy and the Markov process (there is no such thing in the company now, I'll go back and find it and make it up). Mastering this knowledge, it is good for you to understand the cross entropy and relative entropy, which look similar but easy to confuse. At least you know why many machine learning algorithms like to use cross entropy as cost function ~More than 1mm around components, more than 3.2 mm around the annular shape of mechanical positioning holes and optical positioning holes, and more than 5mm away from PCB edges.The specific test process is as follows这姜二小姐也忒霸道了。Original Title: Revealing the Love Game of Plants