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Compared with SYN cache method, SYN? Cookies technology does not need to allocate space at all when receiving a SYN. Because the most basic data that make up the connection state are encoded and compressed into the sequence number bits of SYN-ACK. For a legitimate connection, the server will receive an ACK message segment with a serial number (actually the serial number has been added by 1), then the basic TCB data will be regenerated, and a complete TCB will confirm that the data will be safely instantiated through decompression. This decompression can be successful even under severe attacks, because there is no storage load at all on the host side, only the load that calculates the encoded data into the ACK sequence number. The disadvantage is that not all TCB data can be added to the 32-bit sequence number segment, so some TCP options required for high performance cannot be encoded. Another problem is that such SYN-ACK message segments will not be forwarded (because forwarding requires complete state data).1. At the beginning of Apple's establishment, it mainly developed and sold personal computers. As of 2014, it was committed to designing, developing and selling consumer electronics, computer software, online services and personal computers.可即便如此，依然屡禁不绝，昨日老丁在的时候，大家敬老丁三分，还不进杨家的海田，可现在单靠杨长帆，完全镇不住，吓走几个转头又回来了，过去吼又赶紧出去了，然后再回来，实在叫苦不迭，杨长帆单是轰这堆人都轰不过来，别提干正事儿了。黑得理直气壮。《喜新不厌旧》创作人推出全新喜剧《#blackAF》，请到肯亚·贝瑞斯与罗希达·琼斯联袂演出，2020 年 4 月 17 日在 Netflix 上线。《沉默不语的顾小姐》讲述的是顾轻舟改名换姓为了给哥哥洗清冤屈而精心布置了一系列计划，以为一切尽在掌握，没想却陷入了一场局中局，变成了别人的棋子，面对亲情、友情和爱情，在坚守和放弃中，她最终拨开了迷雾，找出了真相，也找回了真实的自己。一个女声道：你跟我进去瞧瞧就晓得了。Modules in Node.js run as singletons after loading and follow the principle of value passing: if it is an object, it is equivalent to a reference to this object.