The principle is that syn messages are first responded to syn_ack by DDOS protection system. With a specific sequence number (recorded as a cookie). The real client returns an ack and the Acknowledge number is cookie+1. The fake client will not respond. In this way, we can know that the clients corresponding to those IP are real and add the real client IP to the white list. The next access passes directly, while other forged syn messages are intercepted. The following is a schematic diagram of protection:?咱们村，像这个天，早上还没亮的时候，雾气蒙蒙的，好些人背着粪筐子，跟鬼魂似的，就在房前屋后、村里村外转圈。20. Repeated work wastes more time. More time should be spent on work instead of just writing. Fortunately, it is not necessarily possible to do a good job. Regular organization and management personnel can hold seminars to summarize the work and raise some work problems and matters to be coordinated. The departments involved in the problems should keep records and complete the work within a time limit. Our department usually organizes seminars twice a week. Work plans, summaries and daily work logs are submitted weekly, Generally, problems are reported in a timely manner. In addition, the cashier foreman's work is rather complicated. While doing a good job in daily work, he has to deal with all kinds of emergencies, return of goods by customers and replacement of cashiers at the cashier's desk to avoid suspension of the cashier's desk. He also has to sum up the problems in the work and find out the improvement methods. There is not much time to write. I hope the company leaders can consider the time needs of each post and don't just let everyone write it. Each department will discuss it regularly and solve the problem within a time limit. Even if it saves time, it also has efficiency.嗯？庞夫人警觉起来。In the "Learning Massive Open Online Course" section, free video courses are divided into 5 categories, including social law, science, technology, agriculture and medicine, humanities and philosophy, politics and economy, and others, totaling nearly 200 courses. This includes 16 social law courses such as "Operations Research", "Tort Liability Theory" and "Communication Psychology". "Diagnostics of Traditional Chinese Medicine", "Antenna Principle", "Astronomical Exploration" and other 63 science, technology, agriculture and medicine courses, "Nine Lectures on the Essence of Marxist Philosophy Principles", "Guan Zhong's Management Thought of Chinese Famous Phase" and "Five Types of Poetic Life" and other 60 kinds of human history and philosophy courses, 15 kinds of political and economic courses such as "CPC Tax System", "Political Ethics" and "Corporate Finance" and 24 kinds of other courses that have not yet been classified, such as "Self-shaping: Five Elements of Success", "Gem Processing Technology" and "Cosmetic Appreciation and Application".10. Department Responsibilities, Job Descriptions and Work Flow Chart: Department Responsibilities shall be set by the Administrative Director within a time limit and revised by each department manager. The responsibilities, job descriptions and work flow charts of each post shall be set by the administrative personnel department within a time limit, and the personnel of each post shall draft them by themselves. The heads of each department shall collect and review the manuscripts and submit them to the administrative personnel department. The Company has set up a unified construction team for department responsibilities and job descriptions. The administrative and personnel department will conduct preliminary examination, review and final examination together with the team, and report to the board of directors of the Company for approval, filing, distribution and implementation.
