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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).韩信疑问道：越王认为我比周勃、曹参强吗？是的。于是对王管家道：不瞒王管家，在下军务紧急，实在不敢耽搁——眼见王管家脸色沉了下来，赶紧加快语速——如今倒有个主意，说出来王管家看可行否：在下留十个军士并虎王寨的人，听候王管家调遣。艺术品商人兼收藏家马淑湘（邓萃雯 饰）与丈夫孙逸（陈锦鸿 饰）结婚二十周年，决定委托插画师许或然（谈善言 饰）将她和孙逸共同走过的这些年画成十幅画作，以作纪念。筹备期间，孙逸及许或然渐生情愫。马淑湘发现二人关系后，找回多年没有联络的妹妹马淑媛（廖碧儿 饰）协助自己力挽狂澜。另一方面，马淑湘与一直暗恋她的主诊医生林若德（林德信 饰）也发展出一段亲密关系。香港九龙区旺角混混阿杰做事利落重情义，颇有老大风范，为了照顾做事冲动又好面子的小弟乌蝇，他不停地在各种大小麻烦中周旋，甚至不惜为乌蝇与黑道狠角色结仇。阿杰表妹阿娥前来旺角看病暂住他家，两人慢慢互生情愫，但因为担心自己的身份最终会给阿娥带来伤害，阿杰选择了将心事埋藏。待阿杰明白真情抑压不住想对命运做抵抗时，乌蝇却再次因好面子面临生命危险，于是一道友情与爱情必选其一的难题重又摆在阿杰面前。2018-03-09 10:33:30