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Strategic Deployment and Mission Critical (STEP 6): Business design and business plan need to be implemented layer by layer through annual strategic deployment (BP), and the design of strategic deployment plan needs to comply with the principle of equal responsibilities (mission critical), rights (resource budget) and benefits (KPI and bonus). The main reason why the strategy cannot fall to the ground or the implementation effect is poor is that there is no good balance among responsibilities, rights and benefits.In TCP implementation, when receiving the SYN request from the client, the server needs to reply the SYN + ACK packet to the client, and the client also needs to send the confirmation packet to the server. Usually, the initial serial number of the server is calculated by the server according to certain rules or adopts random numbers. However, in SYN cookies, the initial serial number of the server is obtained by hash operation and encryption of the client IP address, client port, server IP address, server port and other security values, which is called cookie. When the server suffers from SYN attack and makes the backlog queue full, the server does not reject the new SYN request, but replies the cookie (SYN serial number of the reply packet) to the client. If it receives the ACK packet from the client, the server subtracts 1 from the ACK serial number of the client to obtain the cookie comparison value, and performs a hash operation on the above elements to see if it is equal to the cookie. If equal, complete the three-way handshake directly (Note: At this time, you don't need to check whether this connection belongs to the backlog queue).1929年，身为东北军航空兵的高志航被张学良将军派往黑河，从土匪手中换回几天前被匪首于青山击落的日军飞机。高志航出色地完成了任务并在黑河邂逅了俄罗斯美女葛莉儿，葛莉儿被这个有留法背景的中国飞行员深深吸引，不顾一切地跟他来到了沈阳。物理天才李斯坦沉迷于穿越时空的研究，在自己的家做实验，成功的Disk shutdown!Reflection attack is also called amplification attack. This kind of attack is mainly based on UDP protocol. Common attack types include NTP, DNS, etc. Generally, the traffic of request response is much larger than the traffic of request itself. Attackers can create large-scale traffic sources with small traffic bandwidth through the characteristic that traffic is enlarged, thus launching attacks on targets. Reflective attacks are not strictly a kind of attacks. They only use the business characteristics of certain services to launch Flood attacks at a lower cost. The detailed schematic diagram is as follows: