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Handler: abstraction handlerAmplification attack is a special kind of reflection attack, Its special feature is that the reflector has an amplifying effect on network traffic, so we can also use this reflector as an amplifier, and the way of amplifying attack is basically the same as that of reflecting attack, except that the network service provided by the reflector (amplifier) needs to meet certain conditions.(2) The client side initiates a connection request to the server side, and the Reactor listens to the occurrence of the ACCEPT event and sends the ACCEPT event to the corresponding Acceptor processor for processing. The Acceptor processor obtains the connection (SocketChannel) corresponding to this client through the accept () method, and then registers the READ events that the connection is concerned about and the corresponding READ event handler with the Reactor, so that the Reactor will listen for the READ events of the connection. Or when you need to send data to the client, register the WRITE event for the connection and its processor with Reactor.我也不知道。Using proxy mode, the function can be divided more clearly, which is helpful for later maintenance!11. Os.getcwd ()--Get current work dir