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(4) Instructor's License (applicable to flight instructors)For spoofing attacks, the first thing to consider is to choose the address. For the attack to succeed, the host on the spoofed IP address must not respond to any SYN-ACK packets sent to them. A very simple method that an attacker can use is to disguise only one source IP address, and this IP address will not respond to SYN-ACK packets, perhaps because there is no host on this IP address at all, or because some configuration has been made to the address or network properties of the host. Another option is to disguise many source addresses, and attackers will assume that hosts on some of these disguised addresses will not respond to SYN-ACK packets. To implement this method, you need to recycle the addresses on the list of source IP addresses that the server wants to connect to, or make the same modifications to hosts in a subnet.这样焚琴煮鹤的事，也就你能干得出来。两列火车发生了对撞的惨剧，131名乘客不幸遇难。唯一的幸存者大卫醒来后发现自己在费城医院的急诊室中，更奇怪的是他不仅得以生还，而且全身上下一点儿伤也没有。这次事件引起一个名叫伊利亚的黑人的注意，伊利亚天生手脚残废，命运多舛的他认定大卫身上有某种超自然的力量。男主角大卫能如此幸运地躲过劫难，究竟是老天的恩宠，还是冥冥中有不可思议的邪恶力量在控制著他？在伊利亚的引导下，大卫逐渐发现了其中的秘密…… 　　布鲁斯威利斯扮演的大卫是一位遭遇家庭危机的中年男人，在大学体育馆从事保卫工作，以前曾是美式橄榄球运动员。在一次从纽约返回费城的路上，大卫乘坐的列车发生事故。车上的乘客除了大卫全部遇难，而大卫却毫发未伤。当地媒体报道了这一事故，并特别提到了唯一的幸存者大卫。 　　Introduction to the Unpacking of AnchorChef Low Temperature Slow Cooking Machine　　Noel Clarke将主演制片公司Tiger Aspect Productions制作的ITV剧《观点Viewpoint》，这部剧来自《伦敦生活 Fleabag》的导演Harry Bradbeer及爱伦•坡奖得主编剧Ed Whitmore，这部5集剧讲述警方在曼彻斯特进行严密的监视调查行动，而剧情会探讨观察他人时是否存在真正的「客观」以及影响。　　Noel Clarke饰演Martin King总警司，他在单亲母亲Zoe Sterling（Alexandra Roach饰）家里设立监视点，因为这儿可以清楚观察到韦斯特伯里广场及失踪小学教师Gemma Hillman（Amy Wren饰）的家。Gemma Hillman失踪前与男友Greg Sullivan（Fehinti Balogun饰）同住，而他亦是主要嫌疑犯。　　其他演员包括Catherine Tyldesley﹑Bronagh Waugh﹑Sarah Niles﹑Shannon Murray ﹑Phil Davis﹑Ian Puleston-Davies﹑Dominic Allburn﹑Marcus Garvey﹑Carlyss Peer及Erin Shanagher。Well, that's him,