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Business Innovation Design (STEP 4): To make up for the opportunity gap, business design innovation is required, including developing new products, implementing new business models, adopting new competitive strategies, etc. Business design can help us to design a business model that can seize market opportunities to achieve strategic objectives and the product mix strategy that should be adopted.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).到了十月，这消息就证实了：靖国同西北的元国（虚构）开战，且是大战，双方都出动了几十万军队。唐朝乾符年间，立志成为大诗人的寒门学子骆秋迟，通过诗词比赛，进入竹岫书院学习。竹岫书院乃当时为培养年轻诗人而在都城开办的学习机构。骆秋迟入学后，与排名书院第一的付远之产生了作诗风格上的分歧，最终骆秋迟凭借“飞花令”战胜付远之，并带领同学走朴实的诗词文风。在之后的丛林遇险、寿宴真假字画、上元灯节灯谜赛等事件后，骆秋迟与书院学子共同成长。在“祈雨诗赛”上，骆秋迟拔得头筹。安南国使团与大唐学子的学术交流中，骆秋迟更是带领学生赢得了马球比赛和赋诗比赛的胜利，文体两开花，为国添光增彩。最终骆秋迟参加科举，高中状元，造福一方。生长于伊豆小镇的小日向光，以及从东京搬来的大木双叶。一同进入梦丘高中的两人，在呼吸器潜水以及日常的平凡事件当中，找到了很多的幸福。曾经对任何事都很消极的双叶，在总是开朗乐观的光的影响下，经历了很多向前踏出一步的喜悦。不止如此，双叶还在期盼已久的开放水域潜水员实习中合格，接下来将要以进阶开放水域潜水员为目标。仅此一次、无可替代的高中生活，现在才正要开始。美妙的日子仍未结束，两人一同走过的日子还要一直继续。背景设定在一个平均水准酒店中的104号房间，剧集将讲述每集该房间的不同房客，他们形形色色的故事。