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Make practice part of your routine//154翘儿当即心领神会，真出了事，搞坏了炮，千户怒起来老杨是压不住的，为今只能破财免灾了。一天當克雷斯來到父親米格爾創辦的劍道場時,遇到許久不見的德雷斯坦師父,此時米格爾告訴克雷斯,有關那條作為15歲生日禮物的項鍊上的寶石時,自幼與格雷斯一起長大的切斯塔來找格雷斯出外打獵,故事由此展開!Diao Shen Xia: This kind of person may not be limited to running a few demo. He has also made some adjustments to the parameters in the model. No matter whether the adjustment is good or not, he will try it first. Each one will try. If the learning rate is increased, the accuracy rate will decrease. Then he will reduce it. The parameter does not know what it means. Just change the value and measure the accuracy rate. This is the current situation of most junior in-depth learning engineers. Of course, it is not so bad. For Demo Xia, he has made a lot of progress, at least thinking. However, if you ask why the parameter you adjusted will have these effects on the accuracy of the model, and what effects the adjustment of the parameter will have on the results, you will not know again.转头问石头娘，你敢不敢进？石头娘立即会意，立即接道：我也不敢。急忙抖手掏出一小瓶药，折腾了半天也没倒出来——跟板栗相反，她见了这可怕的大家伙，已经吓得手软脚软，根本动不了了。SYN attack is a kind of DOS attack. It takes advantage of TCP protocol defects and consumes CPU and memory resources by sending a large number of semi-connection requests. SYN attacks can not only affect hosts, but also harm network systems such as routers and firewalls. In fact, SYN attacks can be implemented as long as these systems turn on TCP services no matter what systems are targeted. As can be seen from the above figure, the server receives the connection request (syn=j), adds this information to the unconnected queue, and sends the request packet to the client (syn=k, ack=j+1), then enters the SYN_RECV state. When the server does not receive an acknowledgement packet from the client, it retransmits the request packet and does not delete this entry from the non-connection queue until the timeout. With IP spoofing, SYN attacks can achieve good results, Typically, clients forge a large number of non-existent IP addresses in a short period of time, SYN packets are continuously sent to the server, and the server replies to the confirmation packets and waits for the confirmation of the customer. Since the source address does not exist, the server needs to continuously resend until it timeout. These forged SYN packets will occupy the unconnected queue for a long time, normal SYN requests will be discarded, the target system will run slowly, and in serious cases, the network will be blocked or even the system will be paralyzed.