一级理论和二级理论的区别

5 No sign, no light, no police intersection, according to the order of let the right-let the left turn-let the straight ahead.In addition to solving the port problem of A, the serial number problem also needs to be paid attention to. The serial number corresponds to the sliding window. The fake TCP packet needs to be filled with the serial number. If the value of the serial number is not in the sliding window of B when it is sent to B before A, B will actively discard it. So we need to find the serial number that can fall into the sliding window between AB at that time. This can be solved violently, because the length of a sequence is 32 bits, and the value range is 0-4294967296. If the window size is like 65535 under Windows I caught in the above figure, I only need to divide, and I know that at most I only need to send 65537 (4294967296/65535=65537) packets to have a sequence number fall into the sliding window. The desired value can be calculated quickly by exhaustion on multiple control hosts.唐小顺（张卫健 饰）虽然患有精神恍惚症，但却是一名武林高手，自幼跟姐姐大顺（吴君如 饰）学习谭腿，已到了炉火纯青的境界。唐小顺做梦也没想到，他的武功有一天竟然派上了大用场。这天，前著名足球运动员林中虎（黄秋生 饰）无意中看到了小顺和姐姐在较量，谭腿里的一招一式竟然让他联想到了踢球的动作，于是一个前所未有的想法诞生了，中虎决定遍寻民间高手，组成一支功夫足球队，这样定能将中国足球发扬光大。于是，中虎开始游说大顺让小顺加入他的足球队，一起发扬中国足球。经过一番死缠烂打，中虎终于成功说服大顺。中虎再接再厉，继续四出找寻埋没人间的武林高手，经过一番努力，终于组建起一支功夫足球队。然而，各种困难与打击也接踵而来。Once dry, the green becomes very alive.今儿是十六，元宵灯会尚未结束，街面上照样彩灯如画、热闹非凡。九岁的小女孩Katie和父亲一起开始自己美国公路的旅行，在整个旅行的过程中，Katie遭遇到不同的情况，也发现了生活的酸甜苦辣。尽管他们遇到一些困难，但Katie和父亲之间感情却是十分美好。直到他们被卷进一个绑架儿童的案件中后，事情发展越来越恶化，Katie又会遭遇什么呢？　　(*^◎^*)