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In my opinion, some variants of SYN cache technology should be embedded into the server operating system as a curing function, and these variants can be deployed together with other solutions (address-based filtering, ACK camouflage firewall, IP security protocol, etc.) when appropriate. At present, many experts are also working on more robust TCP protocols and hope that these supplementary protocols can be deployed as soon as possible.Shandong Province有人喊道：范老先生，您这么说就不断了，项元帅不也接受了陈王的诏命，担任上柱国吗？范增肃容道：项元帅这么做是为抗秦的权宜之计，再者说，这上柱国项元帅也当得起。The main purpose is to save a state of an object, In order to restore the object at an appropriate time, I think it is more vivid to call the backup mode. Generally speaking, assuming that there are various attributes in the original class A and A, A can decide the attributes to be backed up, memo class B is used to store some internal states of A, and class C is used to store memos and can only store, not modify and other operations. Make a picture to analyze it:Click "New Rules Purchase" to buy Manaka ~